67 results about "Impact energy absorption" patented technology

The subject of the invention is an impact energy absorbing device, comprising a shock absorber (3) with a cylinder (3a) and piston rod (3b), a sleeve (1) to be cut and a machining tool (2) surrounding the sleeve (1) to be cut, for machining the surface of the sleeve (1) to be cut, characterized in that the sleeve (1) to be cut is a cylinder (3 a) of the shock absorber (3).

According to the anti-collision beam for power battery protection and the installation position determining method, an aluminum alloy irregular cavity anti-collision beam structure is adopted, a multi-stage energy absorption channel formed by connecting multiple cavities and inner ribs is utilized, and efficient impact energy absorption under the light weight condition is achieved; meanwhile, the optimal arrangement distance between the anti-collision beam and the front wall of the battery pack is determined through simulation analysis, so that the anti-collision beam collapses and absorbs energy step by step in the collision process, impact energy is dissipated step by step through a shell of the battery pack, the maximum deformation quantity of a battery cell is remarkably reduced, and the impact-resistant safety performance of a battery system and the protection reliability of the whole vehicle are improved.

The invention provides a textile composite material impact energy absorption simulation method, system and device and a medium, and the method comprises the steps: carrying out the connected domain analysis of a tomography image, and determining the equivalent diameter distribution characteristics of pore defects in a textile composite material; performing stochastic simulation based on the equivalent diameter distribution characteristics in combination with a mesoscopic geometric model of the textile composite material to obtain stochastic pore space distribution of the textile composite material in the resin enrichment area; geometric difference is carried out on the random pore space distribution and the mesoscopic geometric model, and then a mesoscopic finite element model containing pore defects is constructed; and endowing the mesoscopic finite element model with material attributes and carrying out explicit kinetic analysis on impact load, and further determining the impact energy absorption performance of the textile composite material prepared in the batch according to an analysis result. By adopting the scheme of the invention, systematic deviation of impact energy absorption performance prediction caused by model idealization can be reduced.

To provide an impact energy absorption structure member having excellent impact energy absorption performance relative to an oblique impact.SOLUTION: An impact energy absorption structure member includes an aluminum extrusion material and has a shape in which an extrusion material cross section with a specific shape extends in an extrusion direction that is a vertical direction to the extrusion material cross section. The extrusion material cross section includes a shape in which two or more sections surrounded by a wall part comprising the aluminum extrusion material are aligned adjacent to each other in one direction. In an impact test, before a section 1 that receives an impact first is crushed completely, a boundary of a section 2 that receives the impact secondarily with the section 1 is deformed in an inner direction of the section 2, and a wall part that does not come into contact with a section other than the section 2 is deformed in an outer direction of the section 2 on the extrusion material cross section.SELECTED DRAWING: Figure 1

The application discloses a bionic variable stiffness interlocking structure suitable for a planetary lander and a preparation method, and relates to the technical field of deep space exploration. The bionic variable stiffness interlocking structure of the application reserves a gap, an auxiliary rib or a cylinder as a weak end, the weak part is preferentially dissipated damage under load, and the overall secondary stiffness change is realized through truss fitting and locking and compression. The application adopts a partition functional arrangement, uses a martensite dominant nickel-titanium alloy lattice support in a landing impact energy absorption part, relies on martensite reorientation to realize efficient energy dissipation, low residual strain and shape recovery, uses an austenite dominant nickel-titanium alloy lattice support in a main load bearing core area, and uses the high modulus and buckling resistance characteristics to guarantee the structure stiffness and stability. Through the collaborative combination of the two types of alloy units, the load bearing, buffering and adaptive variable stiffness integration are realized, the planetary landing process multi-load coupling working condition requirements can be effectively met, and the structural reliability and buffering performance of the lander under deep space extreme environment are improved.

The invention discloses a strain rate sensitive composite foam material and a preparation method thereof, and relates to the technical field of high polymer materials, and the preparation method comprises the following steps: mixing hydroxyl-terminated polydimethylsiloxane, thermoplastic polyurethane powder, a microsphere foaming agent, boric acid and a derivative thereof, and foaming in a temperature range of 65-120 DEG C to obtain the strain rate sensitive composite foam material, the mass ratio of the hydroxyl-terminated polydimethylsiloxane to the thermoplastic polyurethane powder is within the range of 1: (1-10); the addition amount of the microsphere foaming agent is 0.02-15wt% of the total mass of the foaming powder; the molar weight of the boric acid and the derivative thereof is 1-10 times of the molar weight of the hydroxyl-terminated polydimethylsiloxane; the strain rate sensitive composite foam material prepared by the invention has good size and structural stability, good strain rate effect and impact energy absorption effect, and the preparation method is simple.

The application discloses an insect exoskeleton morphological layup composite panel, a sandwich structure and a preparation method. The sandwich structure comprises two pieces of bionic layup composite panels and a piece of aramid honeycomb core layer. The bionic layup composite panel draws lessons from the spiral stacking microstructure of the insect exoskeleton, the layup design considers the symmetry and balance requirements of the composite material, a fixed rotation angle is introduced between adjacent fiber layers, and the rotation angle is taken as a period of 180 degrees, and after a plurality of periods are laid and heat-pressed and cured, the bionic layup composite panel is obtained. The bionic layup design effectively reduces the interlaminar shear stress of the composite material, weakens the inherent anisotropy of the composite material, and improves the transverse bearing capacity and impact resistance. The bionic layup composite panel and the aramid honeycomb core layer have the advantages of high specific strength, high specific stiffness, impact energy absorption, vibration and noise reduction, electromagnetic shielding and the like, and a structure and function integrated material with more excellent comprehensive performance is obtained, and the structure and function integrated material is expected to be widely used in main load-bearing structures of various spacecrafts.

The utility model provides a kind of Apli leg type impact energy-absorbing protective device for automobile pedestrian protection, including box, box inside hollow formation accommodating cavity, the side of box is equipped with the impact port that is communicated with accommodating cavity, the hook in accommodating cavity is set to the top of box, the side wall of box is set to first protective pad back to impact port, the bottom of box is set to second protective pad, the top of box is set to third protective pad. By setting box, the flight distance of Apli leg type after being impacted can be limited, which is limited in accommodating cavity, after the flight distance is reduced, the landing point deviation rate caused by flight angle is reduced, at the same time, by setting first protective pad on the side wall back to impact port, second protective pad and third protective pad are respectively set on the bottom and top of box, different angle protective measures can be formed in the direction away from impact port, after Apli leg type is impacted and flies, kinetic energy is absorbed, Apli leg type is protected from damage.

The application relates to the application field of metal powder metallurgy technology and discloses a copper-based composite material metal block capable of resisting impact energy and a preparation process and application thereof. The copper-based composite material metal block is used in impact and collision process tests, and impact energy absorption, reduction or elimination is realized by self-pulverization and disintegration. Raw materials of the copper-based composite material capable of resisting impact energy include, in percentage by mass, 1-95% of atomized copper powder, 0-95% of electrolytic copper powder, 1-15% of tin powder, 1-2% of molybdenum disulfide, 0-3% of graphite, 0-7% of phenolic resin, 0-1% of lithium stearate and 0-1% of magnesium stearate. The above raw materials are mixed, secondarily pressed, sintered and electroplated to form the copper-based composite material. When encountering an impacted metal barrier section, the metal block can absorb the counter-impact energy and disintegrate by itself, so that the running speed instantaneously drops to zero, the metal fragment splashing phenomenon does not occur, and the copper-based composite material does not contain lead metal, so that the whole impact and collision process is harmless to the surrounding environment.

The invention provides a method and a device for testing the buffer performance and energy absorption of a flexible film material, and the method comprises the following steps: measuring an initial speed V0, obtaining the change F (t) of force along with time by the product of the change of acceleration along with time measured in the step S8 and the mass of a small ball, and obtaining the change S (t) of displacement along with time by two-time integration, and the specific calculation formula is as follows: the maximum energy absorbed by a film is Emax = E (t), compared with the prior art, the method has the following beneficial effects: 1, a calculation model of the method for testing the buffer performance of the flexible thin film material is established, so that the buffer performance index is more scientific and accurate; 2, the device for testing the buffer performance and the energy absorption of the flexible thin film material studies the influence of the factors on the buffer performance and the energy absorption test result of the flexible thin film material; 3, the impact energy absorption performance of the film is evaluated, and a direct test feedback and comparison reference is provided for research and development of a formula, a structure and a process of the film with higher impact resistance.

The present disclosure provides novel microfiber and graphene reinforced polymer matrix composites and methods of forming them. The disclosed microfiber and graphene reinforced polymer matrix composites exhibit improved mechanical properties such as stiffness, tensile strength, and impact energy absorption.

This invention provides a highly versatile impact energy absorption mechanism that can absorb the impact energy of a colliding object regardless of its installation location. [Solution] The impact energy absorption mechanism consists of a collision receiving part 10, a disc 20, and a specific link mechanism 30. The collision receiving part 10 is movable with one degree of freedom in the collision direction of the colliding object 1. The disc 20 has a one-way clutch 21 and a handle connection point 22 for rotating the disc around a rotation axis. The specific link mechanism 30 is designed to prevent the impact on the colliding object 1 from being transmitted to the collision receiving part 10 during the collision and to prevent the impact on the colliding object 1 when it has finished stopping. One end of the specific link mechanism 30 is connected to the collision receiving part 10 so as to be axially rotatable on an axis perpendicular to the collision direction of the colliding object 1, and the other end is connected to the handle connection point 22 so as to be axially rotatable on an axis in the same direction as the rotation axis of the disc 20.

The invention provides a high collision energy absorption 550MPa grade zinc-based coated steel plate which comprises a base plate and a coating, the base plate comprises the following components in percentage by weight: 0.05%-0.09% of C, 0.15%-0.45% of Si, 1.20%-2.50% of Mn, less than or equal to 0.02% of P, less than or equal to 0.02% of S, 0.03%-0.06% of Al, 0.02%-0.10% of Nb, 0.02%-0.10% of Ti, 0.15%-0.60% of Cr, and Fe and other inevitable impurities; and the plating layer comprises the following components in percentage by mass: 0.15%-3.50% of Al and the balance of Zn. The invention further provides a manufacturing method of the 550MPa-grade zinc-based coated steel plate with the high collision energy absorption. The manufacturing method comprises the steps of smelting, casting, hot rolling and hot dipping. The invention further discloses a hot stamping method of the 550MPa-grade zinc-based coated steel plate with the high collision energy absorption. The hot stamping method comprises the steps of steel plate heating, steel plate cooling and hot stamping. According to the hot stamping forming part produced through the method, the tensile strength is larger than 550 MPa, the yield strength is larger than 370 MPa, liquid-phase brittleness and liquid-phase cracks do not exist, and the hot stamping forming part has good obdurability, excellent corrosion resistance and high collision energy absorption performance.

A tire (1) is disclosed comprising a tread (20) and a belt portion (100) located radially below the tread (20). The tread (20) has two shoulder portions, each shoulder portion comprising a shoulder groove (21). The belt portion (100) comprises an intermediate belt (120) and a pair of working belts comprising a first working belt (110) and a second working belt (130) arranged radially above the first working belt (130). The intermediate belt (120) is arranged between the first working belt (110) and the second working belt (130) and has elongated reinforcement elements making an angle of less than 5° with a circumferential direction of the tire (1). The intermediate belt (120) comprises a first layer (121) and one or more further layers (122, 123). The first layer (121) of the intermediate belt (120) extends over at least 70% of the axial width of an axially largest working belt (110, 130) of the pair of working belts. Each layer of the one or more further layers (122, 123) of the intermediate belt (120) is arranged radially below one of the shoulder grooves (21) and extends over at most 50% of the axial width of the axially largest working belt (110, 130). The belt portion (100) further comprises a top belt (140) arranged radially above the second working belt (130). The top belt (140) comprises reinforcement cords having an impact energy absorption higher than 7 J / mm2.

The purpose of a side sill for a vehicle according to an embodiment of the present invention is to improve the impact energy absorption efficiency of the side sill and to achieve light-weight, and the side sill for the vehicle comprises: a side sill frame which extends in a first direction and has a hollow cavity part; and a reinforcement frame which is arranged in the hollow cavity part and includes a plurality of unit patterns extending in the first direction, wherein the unit patterns each comprise a plane portion arranged on a plane formed in the first direction and a second direction crossing the first direction, and an inclined portion connected to the plane portion and arranged to be inclined with respect to the plane portion, and at least one of the plane portion and the inclined portion includes a bent portion extending in the second direction.

This invention discloses an in-situ self-generated TiBw and TiCp synergistically reinforced bi-matrix heterostructure titanium matrix composite material prepared by powder metallurgy, and its preparation method. This invention aims to solve the problems of "strength-plasticity mismatch" and insufficient dynamic impact energy absorption efficiency in traditional titanium alloys and their composites. The composite material uses pure Ti as the soft phase, TC4 as the hard phase, and B4C particles as the reinforcing precursor. It can be formed by low-energy ball milling, vacuum drying, rapid hot pressing sintering, and heat treatment, without subsequent rolling or forging. B4C reacts in-situ with the matrix to generate TiBw (TiBw) and TiCp (TiCp), constructing a discontinuous in-situ self-generated bi-scale TiBw and TiCp synergistically reinforced heterostructure at the soft-hard phase interface, achieving a significant synergistic effect of strengthening and toughening. The prepared composite material has a quasi-static tensile strength of 1085 MPa and a fracture strain of 16.3%; at 3000 s⁻¹, the tensile strength is 1085 MPa. ‑1 The dynamic compressive strength under strain rate reaches 1562 MPa, with a true strain of 27.8% and an energy absorption efficiency of 408 MJ / m³. This composite material achieves synergistic optimization of high strength, high plasticity, and high energy absorption through mechanisms such as twinned coordinated plasticity, multi-stage whisker fracture energy dissipation, and adiabatic shear band suppression. The invention features a simple process and low cost, making it suitable for the fabrication of lightweight, high-impact-resistant structural components for aerospace, armor protection, and other applications.

The invention relates to a truck tire. A tire includes a tread, two working belts, and an intermediate belt disposed radially between the two working belts. In addition, the tire further comprises a top belt layer comprising reinforcing cords having an impact energy absorption rate higher than 7 J / mm2. In one aspect, the intermediate belt includes a first layer extending over at least 70% of an axial maximum working belt axial width, and one or more further layers underlying one or more shoulder grooves extending over at most 50% of the axial width. In another aspect, the intermediate belt layer comprises a metal cord having the structure a + b x d, where a is 1 to 5, b is 2 to 7, and d is 0.2 mm to 0.5 mm. In another aspect, the intermediate belt has a rubber permeability of at least 90% along at least 90% of its axial width.

To provide a laminated lithium ion secondary battery which is strong against impact from external force and has high reliability and high safety even if it has high capacity and high voltage.SOLUTION: The separator of the laminated lithium ion secondary battery includes a substrate and a heat-resistant coating layer formed on the substrate, wherein the separator has an impact energy absorbing capacity C of not less than 36.0 and not more than 55.0 in MD and TD, and a ratio (CMD / CTD) of a value CMD of the impact energy absorbing capacity C in MD to a value CTD in TD is not less than 0.80 and not more than 1.25. The impact energy absorbing capacity is an area value surrounded by a stress-strain curve and a horizontal axis from an origin to a breaking point in the stress-strain curve obtained by performing a tensile test under a condition of a tensile speed of 100mm / min using a test piece of test piece type 2 by a method in accordance with JISK7127 Plastics-Determination of tensile properties-Part 3: Test conditions for films and sheets.SELECTED DRAWING: Figure 2

The invention discloses a production method of a high-Ni ultrahigh-strength high-toughness steel plate. The steel comprises the following chemical components in percentage by mass: 0.03-0.05% of C, 0.10-0.35% of Si, 0.50-0.70% of Mn, less than or equal to 0.008% of P, less than or equal to 0.0053% of S, 8.6-9.0% of Ni and the balance of Fe and inevitable impurities. The steel plate is produced by adopting a continuous casting billet with the thickness of 180-220 mm, and the thickness of the steel plate is 10 In the casting process, 1-2 kg / min of iron powder is added into a crystallizer so as to control the lower superheat degree; a high-temperature short-time heating process is adopted for the blank, the heating temperature ranges from 1240 DEG C to 1260 DEG C, the heat preservation time ranges from 20 min to 40 min, and water cooling is conducted to the temperature below 350 DEG The heat treatment adopts a quenching, tempering and water cooling process, the quenching temperature is 780-820 DEG C, the tempering temperature is 580-620 DEG C, and water cooling is performed after tempering. According to the steel plate produced through the method, the tensile strength ranges from 760 MPa to 820 MPa, the yield strength ranges from 650 MPa to 690 MPa, and the impact absorption energy at the temperature of minus 196 DEG C is larger than or equal to 120 J.

The invention provides a cabin body buffer structure under gliding landing impact load, and belongs to the field of buffer structures, the cabin body buffer structure comprises a buffer part, a throwing cabin and an ultra-high molecular weight polyethylene plate, hard rubber is fixedly connected to four corners of the ultra-high molecular weight polyethylene plate, and a carbon fiber composite plate is fixedly connected to the outside of the hard rubber; a honeycomb aluminum structure layer is fixedly connected to the interior of the ultra-high molecular weight polyethylene plate and filled with high-density polyurethane foam, and a silicon rubber cushion is arranged on the inner side of the honeycomb aluminum structure layer. According to the invention, through the arrangement of the buffer component, by utilizing the combined design of hard rubber and carbon fiber composite boards, and honeycomb aluminum structural layers and high-density polyurethane foam, the structure and material combination accurately matches the stress characteristics according to the specific working condition of medium inclined falling of the heavy cabin, so that the buffer efficiency is improved; meanwhile, the graded buffer structure and the composite material have a synergistic effect, so that impact energy is fully absorbed, and the impact acceleration is stably controlled.

The invention discloses a steer-by-wire collapse compensation system and device, and the system comprises a position monitoring module which is configured to obtain a first position where a steering wheel slides in a first axis and a second position where the steering wheel rotates in a second axis in steer-by-wire, and merge the first position and the second position to obtain a position signal; the track determination module is configured to receive the position signal and determine the signal variation between the position signal at the current moment and the position signal at the previous moment; the crumple adjusting module is used for receiving the signal variable quantity and determining whether to adjust the crumple quantity of the steer-by-wire crumple compensation device or not according to the value of the signal variable quantity; if the signal variable quantity exceeds the preset variable quantity within the preset time threshold value, crumple adjustment is executed, and otherwise, the current crumple adjustment quantity is kept. According to the invention, through cooperation of passive and active crumple mechanisms, active compensation is carried out on spatial offset caused by different-plane axes, and stable and reliable impact energy absorption under all working conditions is realized.

A protective helmet and an associated impact protection layer are shown. The impact protection layer serves to improve the impact energy absorption of a rigid material within the helmet shell. The impact protection layer is connected to the helmet shell via a support positioned along the inner surface of the helmet. In various embodiments, the impact protection layer comprises a plurality of projections. In certain embodiments, the plurality of projections are conical.

This invention discloses a variable-capacity vapor chamber with a mechanical metamaterial composite support structure and its preparation method. The variable-capacity vapor chamber includes an upper shell and a lower shell arranged opposite each other, liquid-absorbing cores fixed to the inner sides of the upper and lower shells respectively, multiple metastructures sandwiched between the two liquid-absorbing cores, and a circumferentially arranged flexible sealing structure. The metastructures are formed by the flexible liquid-absorbing cores circumferentially wrapping around the outer surface of the mechanical metamaterial. The mechanical metamaterials serve as a load-bearing skeleton, and the flexible liquid-absorbing cores serve as capillary transport channels for the return of the working fluid. The metastructures are used to undergo reversible deformation in the thickness direction to achieve changes in cavity volume while maintaining capillary transport continuity during deformation. Simultaneously, vibration attenuation and impact energy absorption are achieved through the nonlinear mechanical response of the mechanical metamaterials. This invention integrates heat transfer, variable capacity, vibration isolation, and energy absorption functions into one unit, making it suitable for applications such as aerospace equipment and high-power electronic devices that have stringent requirements for both thermal management and vibration reduction.

The application belongs to the technical field of alloy materials, and particularly relates to a 6-series recycled aluminum alloy with impact absorption and intergranular corrosion resistance and a preparation method thereof. The 6-series recycled aluminum alloy with impact absorption and intergranular corrosion resistance is composed of the following components in percentage by weight: Mg 0.45-0.60%, Si 0.40-0.50%, Fe≤0.25%, Cu≤0.50%, Mn≤0.10%, Cr≤0.10%, Ti≤0.10%, V≤0.20%, Zn≤0.10%, other inevitable impurity elements: single≤0.05%, total≤0.15%, and the rest is Al, the aluminum element is derived from 15-25% of raw aluminum and 75-85% of recycled aluminum, and the 6-series recycled aluminum alloy with impact absorption and intergranular corrosion resistance with good mechanical properties is obtained at a lower cost under the condition of adding a higher content of recycled aluminum.

The invention provides a high-deformation self-resetting corrugated board, which is formed by staggering and bonding at least two layers of corrugated medium paper with different corrugation heights, the upper layer of corrugated medium paper layer is arranged to be a B-type corrugation, the lower layer of corrugated medium paper layer is arranged to be an A-type corrugation, and the corrugation peak axis deviation angle of the upper layer of corrugated medium paper layer and the lower layer of corrugated medium paper layer is arranged to be 15-30 degrees; spring supports are arranged on corrugations and valleys of the upper corrugating medium paper layer and the lower corrugating medium paper layer, each spring support is of a topological folding structure formed by bending a nickel-titanium memory alloy wire, the folding angle is 60-90 degrees, and the phase transition temperature is 35-50 DEG C; the corrugation peaks of the upper corrugating medium paper layer and the lower corrugating medium paper layer are covered with degradable PLA film layers; microcapsule phase change wax is embedded in the degradable PLA film layer; the impact energy absorption and automatic deformation recovery are realized through the cooperation of the asymmetric corrugated gradient layout, the topological folding spring bracket and the phase change wax active reset layer.

The utility model discloses an energy absorption device, belongs to the technical field of vibration reduction devices, and particularly relates to an anti-impact energy absorption device which is composed of an elastic energy absorption structure, a supporting base, a rotating shaft, a loading cushion block and the like, and the elastic energy absorption structure is a combined sandwich structure comprising an upper panel, a lower panel and an elastic corrugated sandwich plate. The elastic energy absorption structure is connected with the base through an end lifting lug or a clamping device, when the elastic energy absorption structure is subjected to a vibration impact load, the elastic energy absorption structure converts impact energy into internal energy through structural deformation, the buffering effect is achieved, all the split structures can deform and absorb energy respectively, overall coordination deformation is achieved through contact supporting between the split structures, and the shock absorption effect is achieved. Buffering pads are arranged among the upper panel, the lower panel and the elastic corrugated sandwich plate in an end lifting lug or clamping device area, all split structures can be staggered in a small range, damping of the elastic energy absorption structure is increased, and vibration is attenuated.

The present application relates to the field of building, specifically to a kind of manufacturing method of ultra-low energy consumption sandwich thermal insulation outer wall board with impact resistance, comprising the following steps: S1, design wallboard, determine the thickness of concrete outer leaf plate, concrete inner leaf plate and thermal insulation layer;S2, with the requirement that the two ends of pull connecting cylinder need to be inserted into concrete outer leaf plate and concrete inner compression plate, design the size of pull connecting cylinder, and calculate whether the impact energy absorption and initial stiffness of wallboard meet the design requirements, process the pull connecting cylinder of corresponding size after meeting the requirements;S3, connect each pull connecting cylinder to form a honeycomb structure, and set positioning hole corresponding to the diameter of transverse steel bar on each pull connecting cylinder;S4, groove in the middle of thermal insulation layer, and form a hexagonal layer corresponding to the cross-sectional size of the inner wall of each pull connecting cylinder by cutting the thermal insulation layer peeled off when grooving, the number of hexagonal layers corresponds to the number of pull connecting cylinders, and each hexagonal layer is pasted to the inner wall of corresponding pull connecting cylinder to form an integral structure of pull connecting cylinder and thermal insulation layer;S5, fix the thermal insulation layer, transverse steel bar and longitudinal steel bar with pre-fixed pull connecting cylinder in concrete pouring mold, make each transverse steel bar pass through the positioning hole of corresponding pull connecting cylinder, pour concrete into concrete pouring mold, and then demould after curing, to complete the manufacture of wallboard.The present application improves the initial stiffness and impact resistance of wallboard while improving the thermal insulation performance.

The invention discloses an efficient energy absorption and shock wave attenuation protection structure based on a chain A framework, and relates to the field of protection structures and impact energy absorption, in particular to the efficient energy absorption and shock wave attenuation protection structure based on the chain A framework. The problems that a traditional rigid armor cannot be attached to human joints, the motion freedom degree is limited, energy absorption of a soft material is insufficient under high-speed impact, and the damage risk of a bionic material is high under low-energy impact are solved. The panel is composed of a panel body and a chain A type array. The chain A type array is composed of a plurality of chain A type grillwork units, and the chain A type grillwork units are connected through interlocking points. And the panel covers the impact incident side of the chain A type array. The invention is applied to the field of armor protection.

The invention relates to the technical field of impact energy absorption, in particular to a continuous fiber reinforced composite material mixed expansion type energy absorption structure which comprises a core pipe, an inner pipe is arranged inside the core pipe, an outer pipe is arranged outside the core pipe, the core pipe is connected with the inner pipe and the outer pipe through an adhesive, and the core pipe is made of a continuous fiber reinforced thermoplastic composite material. Comprising reinforced fibers and a base material, the reinforced fibers are laid in the circumferential direction of the axis of a core pipe, and the printing path of the core pipe is a continuous spiral line path. When the expansion compression load is applied, the circumferential pressure stress of the core pipe is converted into the axial tensile stress of the fibers, energy is dissipated by layer-by-layer breakage of the fibers, the outer pipe restrains the radial expansion of the core pipe, and the inner pipe transmits the load. The structure is low in initial peak load and stable in stress platform, and can be widely applied to crashworthiness design and impact protection systems in the fields of rail transit vehicles, automobiles, aerospace and the like.

The application discloses a variable-capacity vapor chamber with a mechanical metamaterial composite support structure and a preparation method thereof. The variable-capacity vapor chamber comprises oppositely arranged upper and lower shells, liquid-absorbing cores fixed to the inner sides of the upper and lower shells, a plurality of superstructure columns arranged between the two liquid-absorbing cores, and a circumferentially arranged flexible sealing structure. The superstructure column is formed by wrapping the outer surface of the flexible liquid-absorbing core in the mechanical metamaterial in the full circumferential direction. The mechanical metamaterial serves as a bearing framework, and the flexible liquid-absorbing core serves as a capillary transport channel for working fluid return. The superstructure column is used for reversible deformation in the thickness direction to realize cavity volume change and maintain capillary transport continuity during the deformation process. Meanwhile, the nonlinear mechanical response of the mechanical metamaterial realizes vibration attenuation and impact energy absorption. The application integrates heat transfer, variable capacity, vibration isolation and energy absorption functions in one, and is suitable for application scenarios with dual stringent requirements for thermal management and vibration reduction, such as aerospace equipment and high-power electronic devices.