CN206107338U - Bionical energy -absorbing box - Google Patents
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- CN206107338U CN206107338U CN201621129323.1U CN201621129323U CN206107338U CN 206107338 U CN206107338 U CN 206107338U CN 201621129323 U CN201621129323 U CN 201621129323U CN 206107338 U CN206107338 U CN 206107338U
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Abstract
本实用新型公开了一种仿生吸能盒，包括第一连接板、盒体以及第二连接板，第一连接板和第二连接板分别固定在盒体的两端，其特征在于：所述盒体由多边形格栅单元的格栅壁以及沿着栅格壁交汇处设置的薄壁柱组成，所述薄壁柱和格栅壁为等截面的波形，在格栅壁与薄壁柱的交汇处形成波形的变形引导线。本实用新型所阐述的吸能盒吸能大、耗能稳定、有效降低碰撞后车速，进一步提高汽车安全碰撞时的最高安全速度，重点适用于汽车零部件设计制造领域或类似有防撞要求的结构，可有效保障主体结构和人们的生命安全。
The utility model discloses a bionic energy-absorbing box, which comprises a first connecting plate, a box body and a second connecting plate, the first connecting plate and the second connecting plate are respectively fixed at two ends of the box body, and is characterized in that: The box body is composed of the grid wall of the polygonal grid unit and the thin-walled columns arranged along the intersection of the grid wall. The thin-walled column and the grid wall are waveforms of equal cross-section, and the deformation of the waveform is formed at the intersection of the grid wall and the thin-walled column leading line. The energy-absorbing box described in the utility model has large energy absorption, stable energy consumption, effectively reduces the speed of the vehicle after the collision, and further improves the maximum safe speed of the vehicle during a safe collision. structure, which can effectively guarantee the safety of the main structure and people's lives.
Description
技术领域technical field
本实用新型涉及一种用于碰撞时吸收冲击的吸能盒，尤其涉及一种汽车吸能盒。The utility model relates to an energy-absorbing box used for absorbing impact during collision, in particular to an automobile energy-absorbing box.
背景技术Background technique
汽车发生碰撞时，特别是低速碰撞时，为避免前纵梁变形，通常在汽车横梁(保险杠)和前纵梁(汽车主框架)之间安装吸能盒。碰撞发生时，首先接触的是汽车前保险杠，其次是吸能盒，最后是前纵梁。汽车保险杠和吸能盒不仅起到保护车内乘员和外部行人安全，使伤害程度尽量降低的作用外，也起到使车辆和其它部件的损坏程度降低的作用，这样在车辆碰撞发生后，其维修成本才会降低。但美国的IIHS的测试结果显示，大部分汽车配置的保险杠目前远没有足够的缓冲性能以达到维修成本降低的目的。因此吸能盒除了应具有足够的强度、刚度以满足汽车较强的抗撞性能外，还应当具有相当的缓冲吸能能力，以此来减弱碰撞时产生的冲击力。因此发生碰撞时，决定其防撞性能的关键部件是汽车保险杠系统与前纵梁之间的吸能部件，吸能特性好的部件将把碰撞产生的能量全部吸收，使车体的其它结构避免永久变形，从而保护汽车前纵梁、发动机等重要部件免受损坏，更保证车内人员不受损伤。当碰撞时汽车达到一定速度时，吸能盒不能完全吸收汽车碰撞时的动能，剩余能量则由纵梁承担，此时汽车的主体结构就会发生损坏，甚至威胁车内人员的安全。When a car collides, especially at a low speed, in order to avoid deformation of the front longitudinal beam, an energy absorbing box is usually installed between the automobile cross member (bumper) and the front longitudinal beam (automobile main frame). When a collision occurs, the first contact is the front bumper of the car, followed by the crash box, and finally the front side member. Automobile bumpers and energy-absorbing boxes not only protect the safety of occupants and external pedestrians in the car and minimize the degree of injury, but also reduce the degree of damage to the vehicle and other components, so that after a vehicle collision occurs, Its maintenance cost will be reduced. However, the test results of the IIHS in the United States show that the bumpers of most automobiles are far from having sufficient cushioning performance to achieve the purpose of reducing maintenance costs. Therefore, in addition to having sufficient strength and rigidity to meet the strong anti-collision performance of the car, the energy-absorbing box should also have a considerable buffering energy-absorbing capacity, so as to weaken the impact force generated during a collision. Therefore, when a collision occurs, the key component that determines its anti-collision performance is the energy-absorbing component between the bumper system and the front longitudinal beam. The component with good energy-absorbing characteristics will absorb all the energy generated by the collision, making other structures of the car body Avoid permanent deformation, thereby protecting important components such as the front longitudinal beam and the engine from damage, and ensuring that the occupants of the car are not damaged. When the car reaches a certain speed during the collision, the energy-absorbing box cannot completely absorb the kinetic energy of the car collision, and the remaining energy is borne by the longitudinal beam. At this time, the main structure of the car will be damaged, and even threaten the safety of the people in the car.
但发明人发现目前的技术中仍然存在以下问题：现有的传统吸能盒仅为四边形矩形或单一的圆柱形，其变形引导线也为折线，从而不同充分利用材料的塑性变形进行耗能。因此存在缓冲性能不足、吸能行程较长等缺点。只能保证当汽车发生低速碰撞时保护器主体结构以及内部人员的安全。当汽车发生中高速碰撞时，会产生较大的二次碰撞伤害，此时吸能盒所起到的作用非常有限。However, the inventors found that the following problems still exist in the current technology: the existing traditional energy-absorbing boxes are only quadrangular rectangles or single cylinders, and the deformation guide lines are also broken lines, so that the plastic deformation of the material is not fully utilized for energy consumption. Therefore, there are disadvantages such as insufficient cushioning performance and long energy absorbing stroke. It can only guarantee the safety of the main structure of the protector and the people inside when the car collides at a low speed. When a car collides with a medium-to-high speed, it will cause a large secondary collision damage, and the role of the energy-absorbing box is very limited at this time.
发明内容Contents of the invention
本实用新型所要解决的技术问题是针对上述现有技术存在的不足，而提供了一种吸能大且耗能快的仿生吸能盒。The technical problem to be solved by the utility model is to provide a bionic energy-absorbing box with large energy absorption and fast energy consumption in view of the shortcomings of the above-mentioned prior art.
为解决上述技术问题，本实用新型采用的技术方案是：In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
一种仿生吸能盒，第一连接板、盒体以及第二连接板，第一连接板和第二连接板分别固定在盒体的两端，其特征在于：所述盒体由多边形格栅单元的格栅壁以及沿着栅格壁交汇处设置的薄壁柱组成，所述薄壁柱以及格栅壁为等截面的波形，在格栅壁与薄壁柱的交汇处形成波形的变形引导线。A bionic energy-absorbing box, the first connecting plate, the box body and the second connecting plate, the first connecting plate and the second connecting plate are respectively fixed at the two ends of the box body, it is characterized in that: the box body is composed of a polygonal grid The grid wall of the unit is composed of thin-walled columns arranged along the intersection of the grid wall. The thin-walled column and the grid wall are waveforms of equal cross-section, and a waveform deformation guide line is formed at the intersection of the grid wall and the thin-walled column.
所述波形为正弦波、余弦波或者正弦波与余弦波的组合波，其中当波形为正弦波y＝Asinx或余弦波y＝Aconx或组合波y＝A(conx+sinx)，其幅值A由下式所确定，其中P为无正弦波时盒体的最高抗压强度，F为使用时所要求的最高抗压强度，x为盒体沿高度方向的变量，dx为对x的微分：The waveform is a sine wave, a cosine wave or a combined wave of a sine wave and a cosine wave, wherein when the waveform is a sine wave y=Asinx or a cosine wave y=Aconx or a combined wave y=A(conx+sinx), its amplitude A Determined by the following formula, where P is the highest compressive strength of the box without sine waves, F is the highest compressive strength required for use, x is the variable of the box along the height direction, and dx is the differential of x:
只有正弦波时： When only sine waves:
只有余弦波时： When only cosine waves:
正弦波与余弦波组合波时： When combining sine and cosine waves:
所述设置有正弦波或余弦波变形引导线盒体可由一体浇筑成型或机械加工方式形成。The guide wire box provided with sine wave or cosine wave deformation can be formed by integral casting or machining.
所述多边形格栅单元为三角形、四边形或六边形等多边形格栅。The polygonal grid unit is a polygonal grid such as a triangle, a quadrangle or a hexagon.
吸能盒的材质选用钢、铝合金或纤维复合材料。The material of the energy-absorbing box is selected from steel, aluminum alloy or fiber composite material.
所述格栅壁两端与薄壁柱两端分别与第一连接板和第二连接板相连。The two ends of the grid wall and the two ends of the thin-walled column are respectively connected with the first connecting plate and the second connecting plate.
位于第一连接板与第二连接板之间的盒体数量等于或大于一个。The number of boxes located between the first connecting plate and the second connecting plate is equal to or greater than one.
本实用新型吸能盒中薄壁小柱-格栅结构具有优秀的变形耗能能力。相比于现有吸能盒，其变形耗能能力是现有吸能盒的5～7倍；相比于未设置正弦波(或余弦波及其组合波形)变形引导线的圆柱结构，本实用新型不但具有耗能稳定、充分利用材料塑性变形能力的特点，而且可以有效降低汽车碰撞瞬间的碰撞力峰值，尽可能地减少碰撞瞬间产生的巨大冲击力对车内人员的安全造成威胁。因此该吸能盒能够快速吸收碰撞能量，耗能稳定，有效降低碰撞后车速，进一步提高汽车安全碰撞时的最高安全速度，重点适用于汽车零部件设计制造领域或类似有防撞要求的结构，可有效保障主体结构和人们的生命安全。且根据不同车型以及碰撞峰值的要求，可通过改变正弦波(或余弦波及其组合波形)变形引导线的幅值改变吸能盒碰撞力的峰值，碰撞力峰值的大小一定程度上也决定了整个结构的耗能能力：不能过大，会对车内人员安全造成威胁；也不能过小，会导致耗能能力不足。当波形为正弦波y＝Asinx或余弦波y＝Aconx或组合波y＝A(conx+sinx)，其幅值A由下式所确定，其中P为无正弦波时盒体的最高抗压强度，F为使用时所要求的最高抗压强度，x为沿高度方向的变量，dx为对x进行微分：The thin-walled small column-grid structure in the energy-absorbing box of the utility model has excellent deformation energy consumption capacity. Compared with the existing energy-absorbing box, its deformation energy consumption capacity is 5 to 7 times that of the existing energy-absorbing box; compared with the cylindrical structure without sine wave (or cosine wave and its combination waveform) deformation guide line, the practical The new type not only has the characteristics of stable energy consumption and full use of the plastic deformation capacity of materials, but also can effectively reduce the peak value of the collision force at the moment of car collision, and minimize the threat to the safety of people in the car caused by the huge impact force generated at the moment of collision. Therefore, the energy-absorbing box can quickly absorb the collision energy, with stable energy consumption, effectively reduce the speed of the vehicle after the collision, and further improve the maximum safety speed of the car during a safe collision. It is mainly suitable for the design and manufacture of auto parts or similar structures that require collision avoidance It can effectively guarantee the safety of the main structure and people's lives. And according to the requirements of different models and collision peaks, the peak value of the collision force of the energy-absorbing box can be changed by changing the amplitude of the deformation guide line of the sine wave (or cosine wave and its combination waveform), and the peak value of the collision force also determines the overall collision force to a certain extent. The energy consumption capacity of the structure: it should not be too large, which will pose a threat to the safety of the occupants in the vehicle; it should not be too small, which will lead to insufficient energy consumption capacity. When the waveform is sine wave y=Asinx or cosine wave y=Aconx or combined wave y=A(conx+sinx), its amplitude A is determined by the following formula, where P is the highest compressive strength of the box without sine wave , F is the highest compressive strength required for use, x is the variable along the height direction, and dx is the differential of x:
只有正弦波时： When only sine waves:
只有余弦波时： When only cosine waves:
正弦波与余弦波组合波时： When combining sine and cosine waves:
上式为定积分公式。The above formula is a definite integral formula.
附图说明Description of drawings
图1为本实用新型仿生吸能盒示意图。Fig. 1 is a schematic diagram of the bionic energy-absorbing box of the utility model.
图2为本实用新型仿生吸能盒侧视图。Fig. 2 is a side view of the bionic energy-absorbing box of the utility model.
图3为本实用新型六边形格栅单元的吸能盒截面示意图Fig. 3 is a schematic cross-sectional view of the energy-absorbing box of the hexagonal grid unit of the present invention
图4为本实用新型四边形格栅单元的吸能盒截面示意图。Fig. 4 is a schematic cross-sectional view of the energy-absorbing box of the quadrilateral grid unit of the present invention.
图5为本实用新型吸能盒截面尺寸示意图。Fig. 5 is a schematic diagram of cross-sectional dimensions of the energy-absorbing box of the present invention.
图6为传统吸能盒截面尺寸示意图。Fig. 6 is a schematic diagram of cross-sectional dimensions of a traditional crash box.
图7为本实用新型与传统吸能盒冲击动能曲线。Fig. 7 is the impact kinetic energy curve of the utility model and the traditional energy-absorbing box.
图中编号：1为第一连接板；2为盒体；3为第二连接板；4为变形引导线；5为螺栓孔，6为六边形格栅单元的吸能盒；7为薄壁柱，8为格栅壁，9为四边形格栅单元的吸能盒。Numbers in the figure: 1 is the first connecting plate; 2 is the box body; 3 is the second connecting plate; 4 is the deformation guide line; 5 is the bolt hole, 6 is the energy-absorbing box of the hexagonal grid unit; 7 is the thin-walled column , 8 is the grid wall, and 9 is the energy-absorbing box of the quadrangular grid unit.
具体实施方式detailed description
本实用新型一种仿生吸能盒，其示意图及中间盒体结构分别如图1、图2和图3所示。该仿生吸能盒，包括第一连接板1、盒体2以及第二连接板3。盒体2由多边形格栅单元的格栅壁8以及沿着栅格壁交汇处设置的薄壁柱7组成，薄壁柱以及格栅壁为等截面的波形，波形的轮廓线形成变形引导线4。第一连接板1和第二连接板3分别固定在盒体2的两端，且第一连接板和第二连接板设置连接螺栓孔5，分别与汽车纵梁和保险杠连接。The utility model is a bionic energy-absorbing box, its schematic diagram and the structure of the middle box body are shown in Fig. 1, Fig. 2 and Fig. 3 respectively. The bionic energy-absorbing box includes a first connecting plate 1 , a box body 2 and a second connecting plate 3 . The box body 2 is composed of the grid wall 8 of the polygonal grid unit and the thin-walled column 7 arranged along the intersection of the grid wall. The thin-walled column and the grid wall are waveforms of equal cross-section, and the outline of the waveform forms the deformation guide line 4 . The first connecting plate 1 and the second connecting plate 3 are respectively fixed at both ends of the box body 2, and the first connecting plate and the second connecting plate are provided with connecting bolt holes 5, which are respectively connected with the longitudinal beam and the bumper of the vehicle.
波形可以为正弦波或余弦波及其组合波，可由一体浇筑成型或机械加工方式形成(如图1与图2所示)。The waveform can be a sine wave or a cosine wave and their combined waves, and can be formed by integral casting or mechanical processing (as shown in Figures 1 and 2).
利用ABAQUS有限元软件对具有正弦波引导变形的仿生吸能盒(图5)进行冲击模拟分析为例，并与现有常用的汽车传统吸能盒(图6)相比较，阐明了仿生吸能盒具有耗能稳定、充分利用材料塑性变形能力的特点。数值模拟分析所用的仿生吸能盒(图5)和传统吸能盒(图6)两侧连接板厚度2mm，盒体高度60mm，截面尺寸分别如图5和图6所示，且两种不同吸能盒的盒体截面积相同，即体积相同，因此更具有可比性。其中仿生吸能盒采用的是正弦波引导变形线，而传统吸能盒则采用折线变形槽。两种吸能盒模型采用材料为铝合金，采用S4R单元分割网格，总体单元数约为30000，吸能盒以70KM/h的速度冲击刚性板，碰撞时间0.01s。Using ABAQUS finite element software to carry out the impact simulation analysis of the bionic energy-absorbing box (Figure 5) with sine wave guided deformation as an example, and comparing it with the existing commonly used traditional automotive energy-absorbing box (Figure 6), the bionic energy-absorbing box is clarified The box has the characteristics of stable energy consumption and full use of the plastic deformation capacity of the material. The thickness of the connecting plates on both sides of the bionic energy-absorbing box (Fig. 5) and the traditional energy-absorbing box (Fig. 6) used in the numerical simulation analysis is 2mm, and the height of the box is 60mm. The cross-sectional area of the crash box is the same, that is, the volume is the same, so it is more comparable. Among them, the bionic energy-absorbing box uses a sine wave to guide the deformation line, while the traditional energy-absorbing box uses a broken-line deformation groove. The two types of crash box models are made of aluminum alloy, and the S4R unit is used to divide the grid. The total number of units is about 30,000. The crash box impacts the rigid plate at a speed of 70KM/h, and the collision time is 0.01s.
图7为二者冲击动能随时间的变化曲线。由该动能曲线可知，1)本实用新型仿生吸能盒在不到0.01s的时间内就吸收了全部动能；而传统吸能盒在0.01s时只吸收了初始动能的约一半。这意味着，当车辆发生碰撞时，传统吸能盒在失效之前不能吸收全部动能，则碰撞最终会由车架(即汽车主框架)承担和耗散剩余动能，产生二次碰撞伤害。由于二次碰撞产生的冲击力将直接由车架承担，导致其变形，严重威胁车内人员的安全；2)当碰撞时间为0.002s时，传统吸能盒的速度为57.2KM/h，而仿生吸能盒此刻的速度为24.7KM/h。在碰撞初期(0～0.002s)，仿生吸能盒能够迅速降低整个系统的动能，降低碰撞速度，降幅达64％。意味着即使发生高速碰撞，仿生吸能盒能够有效降低碰撞后的车速，从而大幅减少二次碰撞给车辆和车内人员带来的伤害。Figure 7 is a curve of the impact kinetic energy of the two with time. It can be seen from the kinetic energy curve that 1) the bionic energy-absorbing box of the utility model absorbs all the kinetic energy in less than 0.01s; while the traditional energy-absorbing box only absorbs about half of the initial kinetic energy in 0.01s. This means that when a vehicle collides, the traditional energy-absorbing box cannot absorb all the kinetic energy before it fails, and the collision will eventually be borne and dissipated by the vehicle frame (ie, the main frame of the car), resulting in secondary collision damage. Because the impact force generated by the secondary collision will be directly borne by the frame, causing its deformation and seriously threatening the safety of the occupants in the vehicle; 2) When the collision time is 0.002s, the speed of the traditional energy-absorbing box is 57.2KM/h, while The speed of the bionic crash box at the moment is 24.7KM/h. In the initial stage of collision (0-0.002s), the bionic energy-absorbing box can rapidly reduce the kinetic energy of the entire system and reduce the collision speed by as much as 64%. It means that even if a high-speed collision occurs, the bionic energy-absorbing box can effectively reduce the speed of the vehicle after the collision, thereby greatly reducing the damage caused by the secondary collision to the vehicle and the occupants.
综上所述，具有正弦波引导变形的仿生吸能盒具有较高的变形耗能能力，在短时间碰撞时能有效降低汽车的碰撞后速度。现在常用的汽车吸能盒通常为低速吸能盒，即安全速度为35～45KM/h，欧洲的安全标准是50KM/h。而仿生吸能盒经过优化预期可将安全速度提升至70～80KM/h，从而有效降低车祸时的车辆损毁程度和车内人员的生命安全。根据中国官方统计报告，2010年，全国共发生道路交通事故238351起，造成67759人死亡、275125人受伤。每次造成严重伤亡的车祸，其根本在于车速过快，未能及时刹车。采用仿生吸能盒的汽车安全速度为70～80KM/h，意味着在城市内部发生正面碰撞的车祸时，可基本保证车内人员安全。我国高速公路上车速一般为100～120KM/h。一般根据驾驶人员的正常反应，遇到紧急情况都会踩刹车。只是由于高速上车速过快，不能将车速降至现有吸能盒的安全速度，即50KM/h以内，因此造成人员伤亡。当采用仿生吸能盒时，只需将车速降至70～80KM/h以内，就可以保证车内人员的安全。这将极大的降低交通事故发生时人员的伤亡率，极具应用价值。除了汽车领域，更适用于航空航天、船舶缓冲力学性能要求更高的领域。所以其应用范围极其广泛，是对缓冲耗能结构的一次重大革新。To sum up, the bionic crash box with sine wave guided deformation has high deformation energy dissipation capacity, and can effectively reduce the post-collision speed of the car in a short-term collision. The commonly used automotive crash boxes are usually low-speed crash boxes, that is, the safe speed is 35-45KM/h, and the European safety standard is 50KM/h. The optimized bionic energy-absorbing box is expected to increase the safe speed to 70-80KM/h, thereby effectively reducing the damage to the vehicle and the safety of the occupants in the event of a car accident. According to China's official statistical report, in 2010, there were 238,351 road traffic accidents across the country, resulting in 67,759 deaths and 275,125 injuries. Every time a traffic accident that causes serious casualties is caused by the fact that the speed of the vehicle is too fast and the brakes cannot be braked in time. The safe speed of the car using the bionic energy-absorbing box is 70-80KM/h, which means that in the event of a frontal collision accident in the city, the safety of the people in the car can be basically guaranteed. The speed of vehicles on expressways in my country is generally 100-120KM/h. Generally, according to the normal reaction of the driver, they will step on the brakes in an emergency. Just because the speed of the vehicle on the high speed is too fast, the speed of the vehicle cannot be reduced to the safe speed of the existing energy-absorbing box, i.e. within 50KM/h, thus causing casualties. When the bionic energy-absorbing box is used, the safety of the occupants in the vehicle can be guaranteed only by reducing the speed of the vehicle to within 70-80KM/h. This will greatly reduce the casualty rate when traffic accidents occur, which is of great application value. In addition to the automotive field, it is more suitable for aerospace and ships with higher requirements for cushioning mechanical properties. Therefore, its application range is extremely wide, and it is a major innovation in the buffer energy consumption structure.
本实用新型多边形栅格结构不限于正四边形的夹层状结构，这种栅格结构也可以是正三角形、六边形结构。薄壁柱的形状可以是圆形或多边形。The polygonal grid structure of the utility model is not limited to the regular quadrilateral interlayer structure, and this grid structure can also be a regular triangular or hexagonal structure. Thin-walled columns can be round or polygonal in shape.
实施例1一种轻质高强多功能缓冲夹层板Example 1 A lightweight, high-strength, multi-functional buffer sandwich panel
该结构除了由上下夹板，以及含有薄壁柱的栅格层组成外，在空腔中填塞发泡型缓冲材料以进一步增强缓冲性能。In addition to the upper and lower splints and the grid layer containing thin-walled columns, the structure is filled with foamed cushioning materials in the cavity to further enhance the cushioning performance.
实施例2一种轻质高强夹层曲面板Embodiment 2 A light-weight high-strength sandwich curved panel
该结构依然由上下夹板，以及含有薄壁柱的栅格层组成，但在制作时，通过调整模具，实现板面由平变曲，增强板材的适用范围。The structure is still composed of upper and lower splints, and a grid layer containing thin-walled columns, but during production, by adjusting the mold, the board surface can be changed from flat to curved, and the scope of application of the board can be enhanced.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106347463A (en) * | 2016-10-17 | 2017-01-25 | 东南大学 | Bionic energy absorption box |
| CN109094499A (en) * | 2018-10-12 | 2018-12-28 | 华侨大学 | A kind of new automobile energy-absorbing box device of the more material mixing of multi-section |
| CN109473584A (en) * | 2018-11-19 | 2019-03-15 | 苏州银禧新能源复合材料有限公司 | Battery box cover and its moulding process |
| CN115289161A (en) * | 2022-10-08 | 2022-11-04 | 吉林大学 | A novel biomimetic energy-absorbing tube structure based on the characteristics of beetle elytra |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106347463A (en) * | 2016-10-17 | 2017-01-25 | 东南大学 | Bionic energy absorption box |
| CN109094499A (en) * | 2018-10-12 | 2018-12-28 | 华侨大学 | A kind of new automobile energy-absorbing box device of the more material mixing of multi-section |
| CN109094499B (en) * | 2018-10-12 | 2024-02-27 | 华侨大学 | Multi-section multi-material mixed automobile energy absorption box device |
| CN109473584A (en) * | 2018-11-19 | 2019-03-15 | 苏州银禧新能源复合材料有限公司 | Battery box cover and its moulding process |
| CN115289161A (en) * | 2022-10-08 | 2022-11-04 | 吉林大学 | A novel biomimetic energy-absorbing tube structure based on the characteristics of beetle elytra |
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