Composite board based on corrugated honeycomb structure

Abstract

The utility model provides a composite board based on a corrugated honeycomb structure, which comprises an upper protection board, a lower protection board and a honeycomb mixed interlayer, the upper protection board and the lower protection board are formed by alloy boards and carbon fiber composite material layers in a staggered and overlapped mode, and the honeycomb mixed interlayer is arranged in the middle of the upper protection board and the lower protection board. The honeycomb mixed interlayer is composed of a first-order alloy honeycomb shell and a second-order carbon fiber composite material honeycomb inner core. According to the utility model, the problems of low energy absorption efficiency, single structure and unstable bearing of the parts such as the outer plate and the skin of the traditional automobile body can be effectively solved, and the structure has excellent crashworthiness, so that the lightweight design and the passive safety of the automobile are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile collision, packaging and protection, in particular to a composite board based on a corrugated honeycomb structure. Background Art

[0002] Automobile safety has always been one of the most important links in automobile engineering research and development, and is an important research topic related to the safety of people's lives and property. In recent years, with the rapid development of the domestic automobile industry and the rapid development of China's road infrastructure, the number of cars owned by Chinese residents is rising rapidly. Whether it is sudden braking or loss of control, or bumps on extreme road conditions, it will pose a certain degree of threat to personal property. Therefore, designing a composite panel with efficient protection function is of great practical significance.

[0003] The more fundamental problem is that the existing body panels, skins and other parts are mostly made of traditional materials, such as metals and alloys, but the energy absorption efficiency and strength of these materials are greatly limited. At the same time, the existing panels are often designed with a single shape and structure, which cannot adapt to different collision situations. In addition, the existing panels face the problem of balancing lightness, high strength and high energy absorption efficiency, and it is difficult to meet the requirements of safety and energy saving at the same time. Utility Model Content

[0004] The purpose of the utility model is to provide a composite panel based on a corrugated honeycomb structure, aiming to effectively solve the problems of low energy absorption efficiency, single structure and unstable load-bearing in traditional vehicle body outer panels, skins and other parts, and to provide a composite panel with excellent crash resistance, thereby improving the lightweight design and passive safety of the vehicle.

[0005] In order to solve the above technical problems, the utility model provides a composite plate based on a corrugated honeycomb structure, including an outer upper protective plate and a lower protective plate and a honeycomb mixed sandwich in the middle; the upper and lower protective plates are composed of alloy plates and carbon fiber composite material layers stacked alternately, and the carbon fiber composite material layer is a polygonal corrugated structure with 0° / 90° alternating layers;

[0006] The honeycomb hybrid sandwich is composed of a first-order alloy honeycomb outer shell and a second-order carbon fiber composite honeycomb inner core, and the second-order carbon fiber composite honeycomb inner core is nested with the first-order alloy honeycomb outer shell.

[0007] In a preferred embodiment: when the carbon fiber composite material layer is arranged on the upper protective plate, its cross-section type is a trapezoidal corrugated structure; when the carbon fiber composite material layer is arranged on the lower protective plate, its cross-section type is a cross-triangular corrugated structure.

[0008] In a preferred embodiment: the carbon fiber composite material layer is formed by thermosetting epoxy resin.

[0009] In a preferred embodiment: the carbon fiber composite material layer and the alloy plate are connected by fixing.

[0010] In a preferred embodiment: the fixing is bonding.

[0011] In a preferred embodiment: the number of single sides of the alloy plates is not less than 3.

[0012] In a preferred embodiment: the first-order alloy honeycomb shell is obtained by facing an array of hollow regular hexagonal units with a predetermined length.

[0013] In a preferred embodiment: the second-order carbon fiber composite honeycomb inner core is embedded into the first-order alloy honeycomb outer shell by heating and curing.

[0014] In a preferred embodiment: the alloy is a titanium alloy.

[0015] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0016] 1. The utility model provides a composite panel based on a corrugated honeycomb structure, in which the titanium alloy and carbon fiber used in the upper and lower protective plates are both high-strength materials. The composite fiber material in the metal material can improve the tensile strength of the protective panel, making the protective panel less likely to break. Secondly, the use of 0° / 90° alternating lamination in the composite fiber layer not only improves the defect of weak shear resistance of carbon fiber, but also increases the multi-angle force performance of the protective panel. In addition, the second-order honeycomb hybrid interlayer is a porous structure with the characteristics of good vibration resistance, high specific strength, high specific stiffness, and efficient energy absorption. Finally, the protective plate is a corrugated structure, which enhances the buffering performance of the composite plate and improves its energy absorption effect.

[0017] 2. The utility model provides a composite board based on a corrugated honeycomb structure, the main body of the external protective plate is made of alloy material, the inner cavity filling structure is a corrugated structure of carbon fiber composite material, forming a metal / carbon fiber hybrid energy absorption structure, and the middle layer is a second-order honeycomb hybrid porous structure. Compared with traditional composite boards, the metal / carbon fiber hybrid design has excellent mechanical properties, enhances the average collision buffering force, and greatly improves the load level of the composite board.

[0018] 3. The utility model provides a composite board based on a corrugated honeycomb structure, wherein the selected composite board combination materials - titanium alloy and carbon fiber are both low-quality and low-density materials, and the middle honeycomb mixed sandwich structure is a porous structure, which further reduces the quality and density of the composite board.

[0019] 4. The utility model provides a composite plate based on a corrugated honeycomb structure, in which the titanium alloy and fiber material in the protective plate both meet the characteristics of high temperature resistance and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the composite board of the utility model;

[0021] Figure 2 It is a schematic diagram of the top view structure of the composite board of the utility model;

[0022] Figure 3 It is a schematic diagram of the top structure of the upper protective plate of the utility model;

[0023] Figure 4 It is a honeycomb mixed sandwich component unit of the utility model;

[0024] Figure 5 This is a front view of the honeycomb hybrid interlayer of the utility model;

[0025] Figure 6 It is a schematic diagram of the top view of the lower protective plate of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0029] The composite board based on the corrugated honeycomb structure described in this embodiment comprises the following components: Figure 1 , 2 The upper protective plate 101, the honeycomb hybrid sandwich 102 and the lower protective plate 103 are shown in the figure. The upper protective plate 101 and the lower protective plate 102 are sandwich structures, and the honeycomb hybrid sandwich 102 in the middle is a filling structure. The upper protective plate 101, the honeycomb hybrid sandwich 102 and the lower protective plate 103 are bonded and connected by epoxy resin.

[0030] From the perspective of structural composition, Figure 3 and Figure 6 As shown, the upper protective plate 101 and the lower protective plate 103 are both composite structures composed of an alloy plate 101-1 and a carbon fiber composite material layer interlaced and overlapped, and the carbon fiber composite material layer and the metal layer are bonded by epoxy resin. The difference is that the carbon fiber composite material layer 101-2 in the upper protective plate 101 is a trapezoidal corrugated structure, and the carbon fiber composite material layer 101-3 in the lower protective plate 103 is a triangular alternating corrugated structure. The laying method of the carbon fiber composite material layer of the corrugated structure is 0° / 90° alternating laying, and is formed by epoxy resin thermosetting. Since the alloy plates 101-1 and the carbon fiber composite material layers are staggered and overlapped, from the perspective of the structural hierarchy, the number of alloy plates 101-1 on the upper and lower protective plates is not less than 3. To be precise, the number of alloy plates 101-1 on one side of the composite plate is an odd number of layers not less than 3, and the number of carbon fiber composite material layers is an even number of layers not less than 2. In view of this, this embodiment uses three and two layers of alloy plates 101-1 and carbon fiber composite material layers on the upper and lower protective plates, respectively, on the basis of this value-taking principle. The two layers of carbon fiber composite material layers are sandwiched between the three layers of alloy layers and run through the entire composite plate, forming a 3 / 2 mixed layout to achieve the purpose of enhancing buffering and improving energy absorption. In addition, considering the stress characteristics of the material, the alloy material of the alloy plate 101-1 described in this embodiment is selected from a titanium alloy with high strength, high heat resistance, excellent corrosion resistance and good low-temperature performance. The selection of titanium alloy improves the tensile strength of the upper and lower protective plates, making them less likely to break. The 0° / 90° alternating lamination used in the carbon fiber composite material layer not only improves the defect of weak shear resistance of carbon fiber, but also increases the multi-angle force-bearing performance of the protective plate.

[0031] like Figure 4 and Figure 5As shown, the honeycomb hybrid sandwich in the middle position is composed of a first-order alloy honeycomb shell 102-1 and a second-order carbon fiber composite honeycomb core 12-2, and the second-order carbon fiber composite honeycomb core 102-2 is nested and connected with the first-order alloy honeycomb shell 102-1 by heating and curing. Specifically, the first-order alloy honeycomb shell 102-1 is obtained by facing the array of hollow regular hexagonal metal units with a predetermined length, and the second-order carbon fiber composite honeycomb core 102-2 is embedded in the first-order alloy honeycomb shell 102-1 by heating and curing. The second-order honeycomb hybrid sandwich is a porous structure, and the hybrid design of the external metal and the internal carbon fiber material is adopted to make it have excellent mechanical properties such as good vibration resistance, high specific strength, high specific stiffness, and efficient energy absorption, which enhances the average collision buffering force of the composite plate and greatly improves the load level of the composite plate.

[0032] In summary, the titanium alloy and carbon fiber materials used in the upper protective plate 101, the lower protective plate 103 and the honeycomb hybrid interlayer 102 in the middle are all high-strength materials. Through structural design, the fiber material is composited in the metal material to improve the tensile strength of the protective panel, increase the load level of the composite plate, enhance the buffering performance of the composite plate, improve its energy absorption effect, and have good impact resistance, thereby achieving the purpose of efficient protection.

[0033] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A composite board based on a corrugated honeycomb structure, characterized in that It includes an upper protective plate and a lower protective plate on the outside and a honeycomb mixed sandwich in the middle; the upper and lower protective plates are composed of alloy plates and carbon fiber composite material layers stacked alternately, and the carbon fiber composite material layers are polygonal corrugated structures with 0° / 90° alternating plies; The honeycomb hybrid sandwich is composed of a first-order alloy honeycomb outer shell and a second-order carbon fiber composite honeycomb inner core, and the second-order carbon fiber composite honeycomb inner core is nested with the first-order alloy honeycomb outer shell.

2. A composite board based on a corrugated honeycomb structure according to claim 1, characterized in that: When the carbon fiber composite material layer is arranged on the upper protection plate, its cross-section type is a trapezoidal corrugated structure; when the carbon fiber composite material layer is arranged on the lower protection plate, its cross-section type is a cross-triangular corrugated structure.

3. The composite board based on the corrugated honeycomb structure according to claim 1, characterized in that: The carbon fiber composite material layer is formed by thermosetting epoxy resin.

4. The composite board based on the corrugated honeycomb structure according to claim 1, characterized in that: The carbon fiber composite material layer and the alloy plate are connected by fixed connection.

5. A composite board based on a corrugated honeycomb structure according to claim 4, characterized in that: The fixing is bonding.

6. The composite board based on the corrugated honeycomb structure according to claim 1, characterized in that: The number of single sides of the alloy plate is not less than 3.

7. The composite board based on the corrugated honeycomb structure according to claim 1, characterized in that: The first-order alloy honeycomb shell is obtained by facing arrays of hollow regular hexagonal units with a predetermined length.

8. The composite board based on the corrugated honeycomb structure according to claim 1, characterized in that: The second-order carbon fiber composite honeycomb inner core is embedded in the first-order alloy honeycomb outer shell by heating and curing.

9. The composite board based on the corrugated honeycomb structure according to claim 1, characterized in that: The alloy is a titanium alloy.

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