A shock-absorbing energy-absorbing composite board and a preparation method thereof

Abstract

The application discloses a kind of vibration-absorbing energy-absorbing composite board and preparation method thereof, comprising: preparation metal cavity and two different metal material metal filling block;Coating release agent on the inner wall of metal cavity;Different metal material metal filling block is alternately stacked and filled in metal cavity along the thickness direction of metal cavity, and vacuumizing and sealing welding treatment are carried out to metal cavity, to obtain first composite blank;First composite blank is heated to first preset temperature and is kept warm in first preset heating time;First composite blank is rolled, to obtain second composite blank;Remove the metal cavity outside second composite blank, to obtain vibration-absorbing energy-absorbing composite board.The prepared vibration-absorbing energy-absorbing composite board is high-strength metallurgical bonding different structure gradient vibration-absorbing energy-absorbing composite board, so that the vibration-absorbing energy-absorbing composite board has higher loss factor, improves damping efficiency, reduces weight, and the combination form is various, significantly improves the economic benefit of product.

Description

Technical Field

[0001] This invention relates to the field of metal composite plate processing technology, and in particular to a vibration damping and energy-absorbing composite plate and its preparation method. Background Technology

[0002] Vibration damping and energy-absorbing panels are functional materials widely used in construction, transportation, aerospace, and military protection. Their core function is to absorb and dissipate external impact energy, thereby reducing structural vibration or impact damage, and thus improving safety and durability. They have broad application prospects.

[0003] Existing vibration-damping and energy-absorbing single-metal plates are engineering materials composed of a single homogeneous metal (such as cast iron, mild steel, or chromium steel), which convert mechanical vibration energy into heat energy through the material's own damping mechanism. However, they have low loss factors, generally poor damping efficiency, high density, and poor frequency band adaptability. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration-damping and energy-absorbing composite plate and its preparation method. The preparation method of the vibration-damping and energy-absorbing composite plate provided by this invention is used to prepare a vibration-damping and energy-absorbing composite plate with structural gradients of different metal materials, which improves the loss factor and damping efficiency and enhances the frequency band adaptability.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a method for preparing a vibration-damping and energy-absorbing composite plate, comprising:

[0007] Prepare a metal cavity and two metal filler blocks made of different metal materials;

[0008] A release agent is coated on the inner wall of the metal cavity;

[0009] The metal filler blocks of different metal materials are alternately stacked and filled into the metal cavity along the thickness direction of the metal cavity, and the metal cavity is vacuum sealed and welded to obtain the first composite plate blank.

[0010] The first composite plate blank is heated to a first preset temperature and kept at that temperature for a first preset heating time.

[0011] The first composite plate blank is rolled to obtain the second composite plate blank;

[0012] Remove the metal cavity on the outside of the second composite plate blank to obtain a vibration-damping and energy-absorbing composite plate.

[0013] Optionally, in the above-mentioned method for preparing the vibration-damping and energy-absorbing composite plate, after preparing the metal cavity and the two metal filler blocks of different metal materials, and before coating the inner wall of the metal cavity with a release agent, the preparation method includes:

[0014] The inner surface of the metal cavity and / or the outer surface of the metal filling block are polished to remove the oxide layer on the surface.

[0015] Optionally, in the above method for preparing the vibration damping and energy-absorbing composite plate, both of the metal filler blocks made of different metal materials are solid metal filler blocks;

[0016] Alternatively, one of the two metal filler blocks of different metal materials may be a cavity structure with a receiving cavity, and the receiving cavity is filled with metal powder and foaming agent, while the other metal filler blocks may be solid metal filler blocks.

[0017] Optionally, in the above-mentioned method for preparing the vibration-damping and energy-absorbing composite panel,

[0018] After rolling the first composite plate blank, and before removing the metal cavity on the outside of the second composite plate blank, the preparation method further includes:

[0019] The second composite board blank is subjected to heating and foaming treatment at a second preset temperature and for a second preset heating time, so that the metal filler block containing the metal powder and the foaming agent is foamed, shaped and cured.

[0020] Optionally, in the above-mentioned method for preparing the vibration-damping and energy-absorbing composite plate, the step of alternately layering and filling the metal cavity with metal filler blocks of different metal materials along the thickness direction of the metal cavity further includes:

[0021] The metal filling blocks of different metal materials are alternately filled into the metal cavity along the length and / or width direction.

[0022] Optionally, in the above-mentioned method for preparing the vibration-damping and energy-absorbing composite plate, the composite reduction rate for rolling the second composite plate blank is 30%-70%.

[0023] Optionally, in the above method for preparing the vibration-damping and energy-absorbing composite panel, the number of alternating layers is 2-50.

[0024] Optionally, in the above-mentioned method for preparing the vibration-damping and energy-absorbing composite plate, the metal cavity is characterized by being prepared from stainless steel or carbon structural steel, and the metal cavity is alternately filled with metal filler blocks made of any two different metal materials selected from aluminum, stainless steel and titanium.

[0025] Optionally, in the above method for preparing the vibration damping and energy-absorbing composite plate, when the materials of the two metal filler blocks are aluminum and stainless steel, the first preset temperature range is 280℃-580℃, and the first preset heating time is 2h-4h.

[0026] When the two types of metal filler blocks are made of stainless steel and titanium, the first preset temperature range is 650℃-950℃, and the first preset heating time is 1h-3h.

[0027] In a second aspect, the present invention also discloses a vibration damping and energy absorbing composite plate, which is prepared by the method for preparing a vibration damping and energy absorbing composite plate as described in any of the preceding claims, and the vibration damping and energy absorbing composite plate includes metal layers of different materials that are alternately stacked along the thickness direction.

[0028] Alternatively, the vibration damping and energy-absorbing composite panel may include multiple metal layers stacked along the thickness direction, each metal layer comprising metal blocks of different materials arranged alternately along the width direction and / or length direction, and adjacent metal blocks in the thickness direction being of different materials.

[0029] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0030] In the method for preparing the vibration-damping and energy-absorbing composite plate provided by the present invention, a metal cavity with a cavity structure is prepared, and two different metal filler blocks are prepared. A release agent is coated on the inner wall of the metal cavity. Then, the metal filler blocks of different metal materials are alternately stacked along the thickness direction of the metal cavity to fill the entire metal cavity. After the metal filler blocks are filled, the metal cavity is evacuated and sealed. The metal filler blocks are sealed in the metal cavity, thereby obtaining a first composite plate blank. Then, the prepared first composite plate blank is heated and kept warm at a first preset temperature for a first preset heating time. Then, the heated first composite plate blank is transported to a rolling mill for rolling to obtain a second composite plate blank. Finally, the outermost metal cavity of the second composite plate blank is removed to obtain the vibration-damping and energy-absorbing composite plate. Compared with existing single-metal damping and energy-absorbing plates made of a single homogeneous metal material, the damping and energy-absorbing composite plate prepared by the method of this invention has different types of component metals stacked alternately. Under the action of rolling deformation, the contact interface of different types of component metals undergoes severe plastic deformation, which improves the bonding strength. This results in a high-strength metallurgically bonded damping and energy-absorbing composite plate with different structural gradients. This makes the damping and energy-absorbing composite plate have a higher loss factor, improves damping efficiency, reduces weight, and has diverse combination forms, significantly improving the economic benefits of the product.

[0031] The vibration damping and energy-absorbing composite plate provided by the present invention is prepared by the above-described method for preparing vibration damping and energy-absorbing composite plates, and therefore possesses all the technical effects of the above-described method for preparing vibration damping and energy-absorbing composite plates, which will not be elaborated further here. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0033] Figure 1 This is a flowchart illustrating a method for preparing a vibration-damping and energy-absorbing composite plate according to an embodiment of the present invention;

[0034] Figure 2 This is a flowchart of a method for preparing a second vibration-damping and energy-absorbing composite plate disclosed in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the metal filling block filling the metal cavity in step 300 of the preparation method disclosed in the embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of the first composite plate blank placed in the heating device in step 400 of the preparation method disclosed in the embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the first composite plate blank being rolled in a rolling mill in step 500 of the preparation method disclosed in this embodiment of the invention.

[0038] Figure 6 This is a schematic diagram of the structure of the second composite plate blank obtained in step 500 of the preparation method disclosed in the embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the vibration-damping and energy-absorbing composite plate obtained by removing the metal cavity in step 600 of the preparation method disclosed in the embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of a metal filler block containing foaming agent and metal powder filling a metal cavity according to the second preparation method disclosed in the embodiments of the present invention.

[0041] Figure 9 This is a schematic diagram of the structure of the vibration-damping and energy-absorbing composite plate prepared by the second preparation method disclosed in the embodiments of the present invention;

[0042] Figure 10 This is a schematic diagram of another vibration-damping and energy-absorbing composite plate disclosed in an embodiment of the present invention, in which metal layers of different materials are stacked along the thickness direction.

[0043] Figure label:

[0044] 10 is a metal cavity, 20 is a metal filler block, 21 is a foaming agent, 22 is a metal powder, 23 is a release agent, 30 is the first composite plate blank, 40 is the second composite plate blank, 50 is a vibration damping and energy absorbing composite plate, 51 is a metal layer, 511 is a metal block, 60 is a heating device, and 70 is a rolling device. Detailed Implementation

[0045] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0048] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] like Figure 1 , Figures 3-7 As shown in the figure, an embodiment of the present invention discloses a method for preparing a vibration-damping and energy-absorbing composite plate, comprising the following steps:

[0051] Step 100: Prepare the metal cavity 10 and the metal filling blocks 20 made of two different metal materials.

[0052] After determining the metal material, the metal sheet is processed according to the preset size to prepare a metal cavity 10 with an opening. The specific size of the metal cavity 10 can be set according to actual needs. The required metal material is determined, and there are at least two different metal materials. Each metal material is processed to prepare a metal filling block 20. Similarly, the specific size of the metal filling block 20 can be set according to actual needs.

[0053] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is evenly distributed on the inner wall of the metal cavity 10, with a thickness of less than 0.1 mm. The release agent 23 can be calcium carbonate or silicon dioxide. The release agent 23 can block the direct contact between the metal cavity 10 and the metal filler block 20, preventing the metal cavity 10 and the metal filler block 20 from sticking together during heating and rolling, and facilitating the subsequent removal of the metal cavity 10.

[0054] Step 300: As Figure 3 As shown, metal filler blocks 20 of different metal materials are alternately stacked and filled into the metal cavity 10 along the thickness direction, and the metal cavity 10 is vacuum sealed and welded to obtain the first composite plate blank 30.

[0055] Metal filler blocks 20 are placed into the metal cavity 10 through the opening of the metal cavity 10. During the placement process, metal filler blocks 20 of different metal materials are laid in an alternating layered manner along the thickness direction of the metal cavity 10 until multiple layers of metal filler blocks 20 fill the entire metal cavity 10. Then, the metal cavity 10 is vacuumed using a vacuuming device to remove the air in the metal cavity 10 and prevent moisture and oxygen in the air from corroding and oxidizing the internal metal. After the vacuuming process is completed, the metal cavity 10 is sealed using a sealing welding device to completely seal each metal block inside the metal cavity 10 and isolate it from contact with the outside air, thus obtaining the first composite plate blank 30.

[0056] Step 400: Heat the first composite board blank 30 to a first preset temperature and hold it at that temperature for a first preset heating time;

[0057] like Figure 4 As shown, after confirming that the metal cavity 10 is properly sealed, the first composite plate blank 30 is placed in the heating device 60 and heated to the first preset temperature, and then kept warm for a first preset heating time at the first preset temperature.

[0058] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40;

[0059] like Figure 5 As shown, the heated first composite plate blank 30 is fed to the rolling mill 70 for rolling, thereby finally obtaining the second composite plate blank 40, as follows. Figure 6 As shown; in a specific embodiment, the rolling equipment 70 may be a two-roll mill, a four-roll mill or a six-roll mill, and those skilled in the art can select according to actual needs.

[0060] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain the vibration damping and energy absorption composite plate 50.

[0061] like Figure 6 and Figure 7 As shown, by removing the outermost metal cavity 10 and retaining only the inner filling layer, a vibration damping and energy absorbing composite plate 50 with different structural gradients is obtained by removing the metal cavity 10. This not only further reduces the overall weight of the vibration damping and energy absorbing composite plate 50, but also enables energy to be dissipated directly through plastic deformation and cavity resonance, resulting in higher energy absorption efficiency.

[0062] Compared with existing single-metal damping and energy-absorbing plates made of a single homogeneous metal material, the damping and energy-absorbing composite plate 50 prepared by the method of this invention has different types of component metals stacked alternately. Under the action of rolling deformation, the contact interface of different types of component metals undergoes severe plastic deformation, resulting in better bonding strength. This yields a high-strength metallurgically bonded damping and energy-absorbing composite plate 50 with different structural gradients. Broadband energy absorption is achieved through the shear deformation and cavity resonance of the alternately stacked different metal materials in the metal cavity 10. This results in a higher loss factor for the damping and energy-absorbing composite plate 50, improved damping efficiency, and reduced weight. The variety of metal materials creates diverse combination forms, allowing for customized structures. Furthermore, the different metal filler blocks are directly and alternately stacked and filled in the metal cavity, followed by heating and rolling operations. The operation is simple, the rolling technology is mature and low-cost, and it enables the large-scale production of damping and energy-absorbing composite plates with different structural gradients, significantly improving the economic benefits of the product.

[0063] In one specific embodiment, such as Figure 2 As shown, after preparing the metal cavity 10 and the two metal filling blocks 20 of different metal materials in step 100, and before coating the inner wall of the metal cavity 10 with the release agent 23 in step 200, the preparation method further includes step 101: polishing the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface.

[0064] For example, a wire brush, grinding wheel, or diamond grinding disc can be used to polish the inner surface of the metal cavity 10 or the outer surface of the metal filling block 20, thereby removing the oxide layer on the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20. This prevents the oxide layer from oxidizing and eroding the interior of the vibration damping and energy absorbing composite plate 50, enhances the bonding strength of each metal layer, and improves the overall performance of the vibration damping and energy absorbing composite plate 50.

[0065] like Figures 3-7 As shown, both types of metal filler blocks 20 are solid metal filler blocks. That is, each solid metal filler block is a solid single metal material, and the metal filler block 20 can be a solid metal plate, a solid metal strip, a solid metal ingot, etc.

[0066] In another specific embodiment, such as Figure 8 and Figure 9 As shown, in addition to the two different metal filler blocks 20 being solid metal filler blocks, one of the two different metal filler blocks 20 can be configured as a cavity structure with a receiving cavity. Then, metal powder 22 and foaming agent 21 of a different metal material than the other metal filler blocks 20 are filled into the receiving cavity, thus forming a combination of different types of component metals and foam metals. This creates a cavity structure inside the composite plate, thereby achieving broadband energy absorption through shear deformation and cavity resonance of the component metals and foam metals, resulting in a higher loss factor. The structural gradient between the metal filler block 20 and the foam metal relies on the topological deformation of the foam metal and the plastic dissipation of the dense metal to achieve the energy absorption effect. This allows for the use of vibration damping and energy absorption composite plates 50 with different structural gradients in different application scenarios. The vibration damping and energy absorption composite plate 50 with structural gradients of different types of metals is suitable for application scenarios with high compressive strength, long-term stability, and extreme environments, while the vibration damping and energy absorption composite plate 50 with structural gradients of metal and foam metal is suitable for application scenarios with high-frequency vibration, lightweight, and collision buffering, thus improving the applicability of the vibration damping and energy absorption composite plate.

[0067] like Figure 2 As shown, when the metal filler block 20 is a cavity structure with a receiving cavity and filled with metal powder 22 and foaming agent 21, the method for preparing the vibration damping and energy-absorbing composite plate provided in this embodiment, after rolling the first composite plate blank 30 in step 500 to obtain the second composite plate blank 40, and before removing the metal cavity on the outside of the second composite plate blank in step 600, further includes step 501:

[0068] The second composite board blank 40 is subjected to heating and foaming treatment at a second preset temperature and for a second preset heating time, so that the metal filler block 20 containing metal powder 22 and foaming agent 21 is foamed, formed and cured.

[0069] In this process, the first composite plate blank 30, filled with metal powder 22 and foaming agent 21, is heated and then conveyed to the rolling mill 70 for rolling to obtain the second composite plate blank 40. The second composite plate blank 40 is then placed back into the heating mill 60 and heated to a second preset temperature. It is then continuously heated and kept at the second preset temperature for a second preset heating time to perform a heat foaming process until it foams and solidifies. This results in a more compact internal structure and a more stable overall structure for the final vibration-damping and energy-absorbing composite plate 50. The method for preparing the vibration-damping and energy-absorbing composite plate provided in this embodiment simultaneously controls the assembly, rolling temperature, pressure, foaming temperature, and time for different structures. This allows for efficient, continuous, and stable forming of vibration-damping and energy-absorbing composite plates 50 with different structural gradients and metallurgical bonding at the composite interface. It offers advantages such as high production efficiency, short process flow, high interface bonding strength, and a wide range of size specifications. Ultimately, it achieves controllable structure and customized vibration-damping and energy-absorbing performance, thus meeting the needs of various applications in different environments.

[0070] In one specific embodiment, such as Figure 3 , Figure 8 and Figure 10 As shown, the process of alternately stacking and filling metal filler blocks 20 of different metal materials into the metal cavity 10 along the thickness direction further includes: alternately filling the metal cavity 10 along the length direction and / or along the width direction of the first composite plate blank 30, that is, in the same thickness layer in the thickness direction, two adjacent metal filler blocks along the length direction are of different metal materials, or, two adjacent metal filler blocks 20 in the same thickness layer along the width direction are of different metal materials, or, two adjacent metal filler blocks 20 along the length direction and two adjacent metal filler blocks along the width direction in the same thickness layer are both of different metal materials. Wherein, the length direction of the first composite plate blank 30 is parallel to the rolling conveying direction of the first composite plate blank 30. Figure 3 (As shown in the left and right directions), the width direction of the first composite plate blank 30 is the direction perpendicular to the rolling conveying direction in the horizontal plane.

[0071] When the metal filler block 20 is a solid metal plate, solid metal plates of different materials are alternately stacked along the thickness direction, and each solid metal plate eventually forms a metal layer 51. The final processed vibration damping and energy-absorbing composite plate 50 is as follows: Figure 10 As shown, the materials of two adjacent metal layers 51 in the thickness direction are different. When the metal filling block 20 is a solid metal strip or solid metal ingot, multiple solid metal strips or solid metal ingots of different materials located in the same layer are alternately arranged along the length direction and / or width direction, resulting in two adjacent metal blocks 511 in each metal layer 51 having different materials along the length direction and / or width direction, such as... Figure 7 and Figure 9As shown, at this time, the materials of two adjacent metal blocks 511 in the thickness direction are also different.

[0072] in, Figure 3 and Figure 8 In the first composite plate blank 30, metal filler blocks 20 of different metal materials are arranged alternately along the length direction on the same thickness layer, that is, the left and right directions of a certain metal filler block 20 are different metal materials. Figure 8 The metal filler blocks 20 of different metal materials are distributed on the left and right (side by side) in a way that has good coordinated deformation through lateral constraint strength and interface shear strength. The high-stiffness metal filler blocks 20 are used to bear the main load, while the low-stiffness foam metal can share the deformation through interface shear force, reducing local stress concentration. Adjacent metal filler blocks 20 achieve load transfer through strong bonding interface.

[0073] In the method for preparing the vibration-damping and energy-absorbing composite plate provided in this embodiment, during the rolling process of the heated first composite plate blank 30 by the rolling equipment 70, the rolling composite reduction rate is 30%-70%, thereby ensuring that the composite interface of the second composite plate blank 40 achieves metallurgical bonding, while ensuring that the metal powder 22 and foaming agent 21 are compacted, thus ensuring that the second composite plate blank 40 has high structural strength.

[0074] In another specific embodiment, metal filler blocks 20 of different metal materials are alternately stacked and filled in the metal cavity 10 along the thickness direction. The number of stacked layers ranges from 2 to 50 layers, specifically 2, 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, or 50 layers, to ensure that the formed vibration damping and energy-absorbing composite plate 50 has good performance in absorbing and dissipating external impact energy and reducing structural vibration or impact damage. Of course, it is understood that those skilled in the art can set the specific number of layers according to actual needs to meet the needs of various application scenarios in different environments.

[0075] In some embodiments, the metal cavity 10 is made of stainless steel or carbon structural steel, and metal filler blocks of any two different metal materials, namely aluminum, stainless steel and titanium, are alternately stacked and filled in the metal cavity.

[0076] In one specific embodiment, the metal cavity 10 is made of stainless steel, and two different metal filler blocks 20, one made of aluminum and the other of stainless steel, are prepared in equal quantities. These filler blocks are then filled into the metal cavity 10 to prepare a first composite plate blank 30. The first preset temperature range of the first composite plate blank 30 is 280℃-580℃, and the first preset heating time range is 2h-4h, ensuring good plastic deformation during the rolling process and high bonding strength, thus producing a structurally stable vibration-damping and energy-absorbing composite plate 50. Alternatively, two different metal filler blocks 20, one made of stainless steel and the other of titanium, can be prepared in equal quantities. These filler blocks are then filled into the metal cavity 10 to prepare the first composite plate blank 30. The first preset temperature range of the first composite plate blank 30 is 650℃-950℃, and the first preset heating time range is 1h-3h, ensuring good plastic deformation during the rolling process and high bonding strength, thus producing a structurally stable vibration-damping and energy-absorbing composite plate 50.

[0077] In a specific embodiment, the steps for preparing the vibration-damping and energy-absorbing composite plate using 3003 aluminum / 304 stainless steel are as follows:

[0078] Step 100: Prepare the metal cavity 10 and two metal filling blocks 20 made of different metal materials;

[0079] A metal cavity 10 with a length of 490mm, a width of 110mm, a height of 190mm, and a wall thickness of 5mm is made of Q235 carbon structural steel. A metal filling block 20 with a size of 80mm, a width of 100mm, and a height of 60mm is made of 3003 aluminum. A metal filling block 20 with a size of 80mm, a width of 100mm, and a height of 80mm is made of 304 stainless steel. There are 9 metal filling blocks 20 made of 3003 aluminum and 9 metal filling blocks 20 made of 304 stainless steel.

[0080] Step 101: Polish the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface;

[0081] Use a wire brush to polish the inner surface of the metal cavity 10 to remove the oxide layer on the surface, or use a grinding wheel to polish each metal filler block 20 to remove the oxide layer on the surface of the metal filler block 20.

[0082] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is a silicon dioxide release agent.

[0083] Step 300: Fill the metal cavity 10 with metal filler blocks 20 of different metal materials alternately along the thickness direction of the metal cavity 10, and vacuum seal the metal cavity 10 to obtain the first composite plate blank 30.

[0084] Nine 3003 aluminum metal filler blocks 20 and nine 304 stainless steel metal filler blocks 20 are alternately distributed in the metal cavity 10 of Q235 carbon structural steel and vacuum-sealed to obtain a first composite plate blank 30 of 3003 aluminum / 304 stainless steel with a length of 490mm, a width of 110mm and a height of 190mm.

[0085] Step 400: Heat the first composite board blank 30 to a first preset temperature and hold it at that temperature for a first preset heating time;

[0086] The first preset temperature is set to 500℃. After the heating device reaches the heating temperature of 500℃, the first composite board blank 30 is placed into the heating device. The first preset heating time is set to 1.5h, and the first composite board blank 30 is continuously heated and kept warm.

[0087] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40;

[0088] The heated first composite plate billet 30 is then fed into a rolling mill and rolled with a reduction rate of 40% to finally obtain the second composite plate billet 40 of 3003 aluminum / 304 stainless steel.

[0089] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain the vibration damping and energy absorbing composite plate 50 of 3003 aluminum / 304 stainless steel.

[0090] After rolling out the second composite plate blank 40, the outermost metal cavity 10 is removed, leaving only the inner filling layer, thus completing the preparation of the vibration damping and energy absorbing composite plate 50. This further reduces the overall weight of the vibration damping and energy absorbing composite plate 50, and also improves the energy absorption efficiency by dispersing stress through dislocation multiplication and strain hardening of the component metals.

[0091] In a specific embodiment, the steps for preparing the vibration-damping and energy-absorbing composite panel using 1060 aluminum foam / 316 stainless steel are as follows:

[0092] Step 100: Prepare the metal cavity 10 and two metal filling blocks 20 made of different metal materials;

[0093] A metal cavity 10 with dimensions of 372 mm in length, 92 mm in width, 192 mm in height, and 6 mm in wall thickness is prepared using 316 stainless steel. A metal filler block 20 with a length of 60 mm, a width of 80 mm, a height of 60 mm, and a wall thickness of 1 mm, also made of 316 stainless steel, is then uniformly filled into the cavity with 1060 aluminum powder and titanium hydride foaming agent. After filling, the cavity is sealed. There are nine metal filler blocks 20 filled with 1060 aluminum powder and titanium hydride foaming agent. Additionally, nine solid metal filler blocks 20 made of 316 stainless steel plate with a length of 60 mm, a width of 80 mm, and a height of 60 mm are also prepared.

[0094] Step 101: Polish the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface;

[0095] Use a wire brush to polish the inner surface of the metal cavity 10 to remove the oxide layer on the surface. You can also use a grinding wheel to polish each metal filler block 20 to remove the oxide layer on the surface of the metal filler block 20.

[0096] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is a silicon dioxide release agent.

[0097] Step 300: Alternately stack metal filler blocks 20 of different metal materials into the metal cavity 10, and vacuum seal the metal cavity 10 to obtain the first composite plate blank 30.

[0098] Nine metal filler blocks 20 filled with 1060 aluminum powder and titanium hydride foaming agent and nine solid metal filler blocks 20 are alternately distributed in a 316 stainless steel metal cavity 10 and vacuum-sealed to obtain a first composite plate blank 30 of 1060 aluminum powder / 316 stainless steel with a length of 372 mm, a width of 92 mm and a height of 192 mm.

[0099] Step 400: Heat the first composite board blank 30 to a first preset temperature and hold it at that temperature for a first preset heating time;

[0100] The first preset temperature is set to 550℃. After the heating device reaches the heating temperature of 550℃, the first composite board blank 30 is placed into the heating device. The first preset heating time is set to 2 hours, and the first composite board blank 30 is continuously heated and kept warm.

[0101] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40;

[0102] The heated first composite plate billet 30 is then fed into a rolling mill and rolled with a reduction rate of 45% to obtain the second composite plate billet 40 of 1060 aluminum powder / 316 stainless steel.

[0103] Step 501: The second composite board blank 40 is heated and foamed at a second preset temperature and for a second preset heating time, so that the metal filler block 20 containing metal powder 22 and foaming agent 21 is foamed, formed and cured.

[0104] The second preset temperature is set to 640℃, and the second preset heating time is set to 2.5h. After the heating device reaches the foaming temperature of 640℃, the second composite plate blank 40 of 1060 aluminum powder / 316 stainless steel is put into the heating device and then heated and kept at the temperature for 2.5h. Finally, the foaming and curing of 1060 aluminum powder and titanium hydride foaming agent are completed.

[0105] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain a vibration damping and energy absorbing composite plate 50 of 1060 foamed aluminum / 316 stainless steel.

[0106] After rolling out the second composite plate blank 40, the outermost metal cavity 10 is removed, leaving only the inner filling layer, resulting in the second composite plate blank 40 with the metal cavity 10 removed, forming a vibration damping and energy-absorbing composite plate 50. This further reduces the overall weight of the vibration damping and energy-absorbing composite plate 50, and also improves the energy absorption efficiency by dissipating energy through the topological deformation of the foam metal and the plasticity of the dense metal.

[0107] In a specific embodiment, the steps for preparing the vibration-damping and energy-absorbing composite panel using 1060 aluminum foam / 304 stainless steel are as follows:

[0108] Step 100: Prepare the metal cavity 10 and two metal filling blocks 20 made of different metal materials;

[0109] A metal cavity 10 with a length of 310 mm, a width of 100 mm, a height of 160 mm, and a wall thickness of 5 mm is made of 304 stainless steel. A metal filling block 20 with a length of 300 mm, a width of 15 mm, a height of 50 mm, and a wall thickness of 2 mm, also made of 304 stainless steel, is then uniformly filled into the cavity with 1060 aluminum powder and titanium hydride foaming agent. After filling, the cavity is sealed. There are 9 metal filling blocks 20 filled with 1060 aluminum powder and titanium hydride foaming agent. Additionally, 9 solid metal filling blocks 20 made of 304 stainless steel, each with a length of 50 mm, a width of 80 mm, and a height of 50 mm, are also prepared.

[0110] Step 101: Polish the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface;

[0111] Use a wire brush to polish the inner surface of the metal cavity 10 to remove the oxide layer on the surface. You can also use a grinding wheel to polish each metal filler block 20 to remove the oxide layer on the surface of the metal filler block 20.

[0112] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is a silicon dioxide release agent.

[0113] Step 300: Alternately stack metal filler blocks 20 of different metal materials into the metal cavity 10, and vacuum seal the metal cavity 10 to obtain the first composite plate blank 30.

[0114] Nine metal filler blocks 20 filled with 1060 aluminum powder and titanium hydride foaming agent and nine solid metal filler blocks 20 are alternately distributed in a 304 stainless steel metal cavity 10 and vacuum-sealed to obtain a first composite plate blank 30 of 1060 aluminum powder / 304 stainless steel with a length of 310 mm, a width of 90 mm and a height of 160 mm.

[0115] Step 400: Heat the first composite board blank 30 to a first preset temperature and hold it at that temperature for a first preset heating time;

[0116] The first preset temperature is set to 550℃. After the heating device reaches the heating temperature of 550℃, the first composite board blank 30 is placed into the heating device. The first preset heating time is set to 2 hours, and the first composite board blank 30 is continuously heated and kept warm.

[0117] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40;

[0118] The heated first composite plate billet 30 is then fed into a rolling mill and rolled with a reduction rate of 45% to obtain the second composite plate billet 40 of 1060 aluminum powder / 304 stainless steel.

[0119] Step 501: The second composite board blank 40 is heated and foamed at a second preset temperature and for a second preset heating time, so that the metal filler block 20 containing metal powder 22 and foaming agent 21 is foamed, formed and cured.

[0120] The second preset temperature is set to 640℃, and the second preset heating time is set to 2.5h. After the heating device reaches the foaming temperature of 640℃, the second composite plate blank 40 of 1060 aluminum powder / 304 stainless steel is put into the heating device and then heated and kept at the temperature for 2.5h. Finally, the foaming and curing of 1060 aluminum powder and titanium hydride foaming agent are completed.

[0121] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain a vibration damping and energy absorbing composite plate 50 of 1060 foamed aluminum / 304 stainless steel.

[0122] After rolling out the second composite plate blank 40, the outermost metal cavity 10 is removed, leaving only the inner filling layer, thus completing the preparation of the vibration damping and energy absorbing composite plate 50. This further reduces the overall weight of the vibration damping and energy absorbing composite plate 50, and also improves the energy absorption efficiency by dissipating energy through the topological deformation of the foam metal and the plasticity of the dense metal.

[0123] In a specific embodiment, the steps of the preparation method of the vibration damping and energy-absorbing composite plate using TC4 titanium / 316 stainless steel are as follows:

[0124] Step 100: Prepare the metal cavity 10 and two metal filling blocks 20 made of different metal materials;

[0125] A metal cavity 10 with a length of 612 mm, a width of 132 mm, a height of 252 mm, and a wall thickness of 6 mm is fabricated using 316 stainless steel. Metal filler blocks 20 with a length of 100 mm, a width of 120 mm, and a height of 80 mm are fabricated using TC4 titanium, and 9 of each type of metal filler block 20 are fabricated using 316 stainless steel.

[0126] Step 101: Polish the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface;

[0127] Use a wire brush to polish the inner surface of the metal cavity 10 to remove the oxide layer. Alternatively, use a grinding wheel to polish each metal filler block 20 to remove the oxide layer from its surface.

[0128] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is a calcium carbonate release agent.

[0129] Step 300: Alternately stack metal filler blocks 20 of different metal materials into the metal cavity 10, and vacuum seal the metal cavity 10 to obtain the first composite plate blank 30.

[0130] Nine TC4 titanium metal filler blocks 20 and nine 316 stainless steel metal filler blocks 20 are alternately distributed in the 316 stainless steel metal cavity 10 and vacuum-sealed to obtain a first composite plate blank 30 of TC4 titanium / 316 stainless steel with a length of 612 mm, a width of 132 mm and a height of 252 mm.

[0131] Step 400: Heat the first composite board blank 30 to a first preset temperature and keep it warm for a first preset heating time.

[0132] The first preset temperature is set to 800℃. After the heating device reaches the heating temperature of 800℃, the first composite board blank 30 is placed into the heating device. The first preset heating time is set to 1 hour, and the first composite board blank 30 is continuously heated and kept warm.

[0133] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40.

[0134] The heated first composite plate billet 30 is then fed into a rolling mill and rolled with a reduction rate of 45% to finally obtain the second composite plate billet 40 of TC4 titanium / 316 stainless steel.

[0135] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain the vibration damping and energy absorbing composite plate 50 of TC4 titanium / 316 stainless steel.

[0136] After rolling out the second composite plate blank 40, the outermost metal cavity 10 is removed, leaving only the inner filling layer, thus completing the preparation of the vibration damping and energy absorbing composite plate 50. This further reduces the overall weight of the vibration damping and energy absorbing composite plate 50, and also improves the energy absorption efficiency by dislocation multiplication and strain hardening of the component metals to disperse stress.

[0137] In a specific embodiment, the steps of the preparation method of the vibration damping and energy-absorbing composite plate using TA1 foamed titanium / 304 stainless steel are as follows:

[0138] Step 100: Prepare the metal cavity 10 and two metal filling blocks 20 made of different metal materials;

[0139] A metal cavity 10 with a length of 370 mm, a width of 110 mm, a height of 190 mm, and a wall thickness of 5 mm is made of 304 stainless steel. A metal filling block 20 with a length of 60 mm, a width of 100 mm, a height of 60 mm, and a wall thickness of 2.5 mm, also made of 304 stainless steel, is then uniformly filled into the cavity. After filling, the cavity is sealed. There are nine metal filling blocks 20 filled with TA1 titanium powder and titanium hydride foaming agent. Additionally, nine solid metal filling blocks 20 with a length of 60 mm, a width of 100 mm, and a height of 60 mm, are also made of 304 stainless steel.

[0140] Step 101: Polish the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface;

[0141] Use a wire brush to polish the inner surface of the metal cavity 10 to remove the oxide layer on the surface, or use a grinding wheel to polish each metal filler block 20 to remove the oxide layer on the surface of the metal filler block 20.

[0142] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is a calcium carbonate release agent.

[0143] Step 300: Alternately stack metal filler blocks 20 of different metal materials into the metal cavity 10, and vacuum seal the metal cavity 10 to obtain the first composite plate blank 30.

[0144] Nine metal filler blocks 20 filled with TA1 titanium powder and titanium hydride foaming agent and nine solid metal filler blocks 20 are alternately distributed in a 304 stainless steel metal cavity 10 and vacuum-sealed to obtain a first composite plate blank 30 of TA1 titanium powder / 304 stainless steel with a length of 370 mm, a width of 110 mm and a height of 190 mm.

[0145] Step 400: Heat the first composite board blank 30 to a first preset temperature and hold it at that temperature for a first preset heating time;

[0146] The first preset temperature is set to 750℃. After the heating device reaches the heating temperature of 750℃, the first composite board blank 30 is placed into the heating device. The first preset heating time is set to 1.5h, and the first composite board blank 30 is continuously heated and kept warm.

[0147] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40;

[0148] The heated first composite plate billet 30 is then fed into a rolling mill and rolled with a reduction rate of 50% to obtain the second composite plate billet 40 of TA1 titanium powder / 304 stainless steel.

[0149] Step 501: The second composite board blank 40 is heated and foamed at a second preset temperature and for a second preset heating time, so that the metal filler block 20 containing metal powder 22 and foaming agent 21 is foamed, formed and cured.

[0150] The second preset temperature is set to 800℃, and the second preset heating time is set to 25min. After the heating device reaches the foaming temperature of 640℃, the second composite plate blank 40 of TA1 titanium powder / 304 stainless steel is put into the heating device and then heated and kept warm for 25min. Finally, TA1 titanium powder and titanium hydrogenation foaming agent complete the foaming and curing.

[0151] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain the vibration damping and energy absorbing composite plate 50 of TA1 foamed titanium / 304 stainless steel.

[0152] After rolling out the second composite plate blank 40, the outermost metal cavity 10 is removed, leaving only the inner filling layer, thus completing the preparation of the vibration damping and energy absorbing composite plate 50. This further reduces the overall weight of the vibration damping and energy absorbing composite plate 50, and also improves the energy absorption efficiency by dissipating energy through the topological deformation of the foam metal and the plasticity of the dense metal.

[0153] In a specific embodiment, the steps of the preparation method of the vibration damping and energy-absorbing composite plate using TA1 foamed titanium / 316 stainless steel are as follows:

[0154] Step 100: Prepare the metal cavity 10 and two metal filling blocks 20 made of different metal materials;

[0155] A metal cavity 10 with a length of 428 mm, a width of 128 mm, a height of 218 mm, and a wall thickness of 4 mm is made of 316 stainless steel. A metal filling block 20 with a 420 mm diameter, a width of 20 mm, a height of 70 mm, and a wall thickness of 2 mm, also made of 316 stainless steel, is then uniformly filled into the cavity. After filling, the cavity is sealed. There are 9 metal filling blocks 20 filled with TA1 titanium powder and titanium hydride foaming agent. Additionally, 9 solid metal filling blocks 20 with a length of 70 mm, a width of 100 mm, and a height of 70 mm, also made of 316 stainless steel, are also prepared.

[0156] Step 101: Polish the inner surface of the metal cavity 10 and / or the outer surface of the metal filling block 20 to remove the oxide layer on the surface;

[0157] Use a wire brush to polish the inner surface of the metal cavity 10 to remove the oxide layer on the surface, or use a grinding wheel to polish each metal filler block 20 to remove the oxide layer on the surface of the metal filler block 20.

[0158] Step 200: Coat the inner wall of the metal cavity 10 with a release agent 23. The release agent 23 is a calcium carbonate release agent.

[0159] Step 300: Alternately stack metal filler blocks 20 of different metal materials into the metal cavity 10, and vacuum seal the metal cavity 10 to obtain the first composite plate blank 30.

[0160] Nine metal filler blocks 20 filled with TA1 titanium powder and titanium hydride foaming agent and nine solid metal filler blocks 20 are alternately distributed in a 316 stainless steel metal cavity 10 and vacuum-sealed to obtain a first composite plate blank 30 of TA1 titanium powder / 316 stainless steel with a length of 428 mm, a width of 108 mm and a height of 218 mm.

[0161] Step 400: Heat the first composite board blank 30 to a first preset temperature and hold it at that temperature for a first preset heating time;

[0162] The first preset temperature is set to 900℃. After the heating device reaches the heating temperature of 900℃, the first composite board blank 30 is placed into the heating device. The first preset heating time is set to 1 hour to continuously heat and keep the first composite board blank 30 warm.

[0163] Step 500: Roll the first composite plate blank 30 to obtain the second composite plate blank 40;

[0164] The heated first composite plate billet 30 is then fed into a rolling mill and rolled with a reduction rate of 45% to obtain the second composite plate billet 40 of TA1 titanium powder / 316 stainless steel.

[0165] Step 501: The second composite board blank 40 is heated and foamed at a second preset temperature and for a second preset heating time, so that the metal filler block 20 containing metal powder 22 and foaming agent 21 is foamed, formed and cured.

[0166] The second preset temperature is set to 750℃, and the second preset heating time is set to 20min. After the heating device reaches the foaming temperature of 750℃, the second composite plate blank 40 of TA1 titanium powder / 316 stainless steel is placed into the heating device and then heated and kept warm for 20min. Finally, the foaming and curing of TA1 titanium powder and titanium hydrogenation foaming agent are completed.

[0167] Step 600: Remove the metal cavity 10 on the outside of the second composite plate blank 40 to obtain the vibration damping and energy absorbing composite plate 50 of TA1 foamed titanium / 316 stainless steel.

[0168] After rolling out the second composite plate blank 40, the outermost metal cavity 10 is removed, leaving only the inner filling layer, thus completing the preparation of the vibration damping and energy absorbing composite plate 50. This further reduces the overall weight of the vibration damping and energy absorbing composite plate 50, and also improves the energy absorption efficiency by dissipating energy through the topological deformation of the foam metal and the plasticity of the dense metal.

[0169] like Figure 7 , Figure 9 and Figure 10 As shown, based on the preparation method of the vibration damping and energy absorbing composite plate described in any of the above embodiments, this embodiment of the invention also discloses a vibration damping and energy absorbing composite plate 50. Since it is prepared by the above-described preparation method of the vibration damping and energy absorbing composite plate, the vibration damping and energy absorbing composite plate 50 includes metal layers 51 of different materials that are alternately stacked along the thickness direction.

[0170] Alternatively, the vibration damping and energy-absorbing composite panel 50 includes multiple metal layers 51 stacked along the thickness direction. Each metal layer 51 includes metal blocks 511 of different materials arranged alternately along the width direction and / or length direction, and adjacent metal blocks 511 in the thickness direction are made of different materials. The metal blocks 511 can be solid metal blocks 511 or metal blocks 511 with foamed metal.

[0171] Since the vibration damping and energy-absorbing composite plate in this application is prepared by the preparation method described in any of the above embodiments, the vibration damping and energy-absorbing composite plate 50 disclosed in this embodiment has all the technical effects of the above-mentioned preparation method of vibration damping and energy-absorbing composite plate, and will not be repeated here.

[0172] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0173] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for preparing a vibration-damping and energy-absorbing composite plate, characterized in that, include: Prepare a metal cavity and two metal filler blocks of different metal materials. One of the two metal filler blocks of different metal materials is a cavity structure with a receiving cavity, and the receiving cavity is filled with metal powder and foaming agent. The other metal filler blocks are solid metal filler blocks, which are solid metal strips or solid metal ingots. A release agent is coated on the inner wall of the metal cavity; The metal filler blocks of different metal materials are alternately stacked and filled into the metal cavity along the thickness direction of the metal cavity, and the metal filler blocks of different metal materials are alternately filled into the metal cavity along the length direction and / or width direction of the metal cavity, and the metal cavity is vacuum sealed and welded to obtain the first composite plate blank. The first composite plate blank is heated to a first preset temperature and kept at that temperature for a first preset heating time. The first composite plate blank is rolled to obtain the second composite plate blank; The second composite board blank is subjected to heating and foaming treatment at a second preset temperature and for a second preset heating time, so that the metal filler block containing the metal powder and the foaming agent is foamed, shaped and cured. Remove the metal cavity on the outside of the second composite plate blank to obtain a vibration-damping and energy-absorbing composite plate.

2. The method for preparing the vibration-damping and energy-absorbing composite plate according to claim 1, characterized in that, After the preparation of the metal cavity and the two metal filler blocks of different metal materials, and before the coating of a release agent on the inner wall of the metal cavity, the preparation method includes: The inner surface of the metal cavity and / or the outer surface of the metal filling block are polished to remove the oxide layer on the surface.

3. The method for preparing the vibration-damping and energy-absorbing composite plate according to claim 1, characterized in that, The composite reduction rate during the rolling of the second composite slab blank is 30%-70%.

4. The method for preparing the vibration-damping and energy-absorbing composite plate according to claim 1, characterized in that, The number of alternating layers is 2-50.

5. The method for preparing the vibration-damping and energy-absorbing composite plate according to any one of claims 1-4, characterized in that, The metal cavity is made of stainless steel or carbon structural steel, and the metal cavity is filled with metal filler blocks of any two different metal materials selected from aluminum, stainless steel and titanium in alternating layers.

6. The method for preparing the vibration-damping and energy-absorbing composite plate according to claim 5, characterized in that, When the two types of metal filler blocks are made of aluminum and stainless steel, the first preset temperature range is 280℃-580℃, and the first preset heating time is 2h-4h. When the two types of metal filler blocks are made of stainless steel and titanium, the first preset temperature range is 650℃-950℃, and the first preset heating time is 1h-3h.

7. A vibration-damping and energy-absorbing composite panel, characterized in that, The vibration damping and energy-absorbing composite panel is prepared by the method for preparing a vibration damping and energy-absorbing composite panel as described in any one of claims 1-6. The vibration damping and energy-absorbing composite panel includes a plurality of metal layers stacked along the thickness direction. Each metal layer includes metal blocks of different materials arranged alternately along the width direction and / or the length direction, and the materials of two adjacent metal blocks in the thickness direction are different.

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