CN217157290U - Multi-scale hierarchical triangular anti-impact structure - Google Patents

Multi-scale hierarchical triangular anti-impact structure Download PDF

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CN217157290U
CN217157290U CN202220547736.0U CN202220547736U CN217157290U CN 217157290 U CN217157290 U CN 217157290U CN 202220547736 U CN202220547736 U CN 202220547736U CN 217157290 U CN217157290 U CN 217157290U
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尹剑飞
程乾
温激鸿
郁殿龙
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National University of Defense Technology
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Abstract

本实用新型属于三角形抗冲击技术领域,公开了一种多尺度的层级三角形抗冲击结构,三角层级结构内部镶嵌有不同几何的三角型,三角层级设有宏观尺度三角形,宏观尺度三角形内部镶嵌有介观尺度三角形,介观尺度三角形内镶嵌有微观尺度三角形。介观尺度三角形将宏观尺度三角形分割成四个区域,四个区域最上端为第一区域,中间为第二区域,左下端为第三区域,右下端为第四区域。第一区域、第三区域、第四区域内镶嵌有微观尺度三角形。具有更高的抗压特性和吸能特性。在静态压缩下,多尺度层级三角形比单一尺度三角格栅结构吸能特性增幅近两倍,在动态冲击下其吸能特性也有部分提高,可用于抗压和抗冲击夹芯板结构设计,具有良好的工程应用价值。

Figure 202220547736

The utility model belongs to the technical field of triangle impact resistance, and discloses a multi-scale hierarchical triangle impact resistance structure. Triangles with different geometrical shapes are inlaid inside the triangular hierarchical structure. Micro-scale triangles are embedded in meso-scale triangles. The mesoscopic-scale triangle divides the macro-scale triangle into four regions. The top of the four regions is the first region, the middle is the second region, the lower left end is the third region, and the lower right end is the fourth region. Micro-scale triangles are inlaid in the first area, the third area and the fourth area. Has higher compressive properties and energy absorption properties. Under static compression, the energy absorption characteristics of multi-scale hierarchical triangles are nearly doubled compared with that of single-scale triangular lattice structures, and their energy absorption characteristics are also partially improved under dynamic impact. Good engineering application value.

Figure 202220547736

Description

一种多尺度的层级三角形抗冲击结构A Multi-scale Hierarchical Triangular Impact-resistant Structure

技术领域technical field

本实用新型属于三角形抗冲击技术领域,尤其涉及一种多尺度的层级三角形抗冲击结构。The utility model belongs to the technical field of triangle impact resistance, in particular to a multi-scale hierarchical triangle impact resistance structure.

背景技术Background technique

目前,抗冲击性能是大型装甲车辆、舰船和航母等装备的关键技术指标,关乎其战场生存能力。通过在装备外侧易遭受打击的区域敷设牺牲层,以牺牲层的塑性变形和破坏来实现对爆炸冲击能量的吸收是目前常用的技术手段。出于对大型装备整体性能及实际工况的考虑,设计轻质高强的抗冲击吸能结构对于提高装甲防护能力、保障装甲安全具有重要意义。At present, shock resistance is a key technical indicator of equipment such as large armored vehicles, ships and aircraft carriers, and it is related to their battlefield survivability. By laying a sacrificial layer on the outside of the equipment that is vulnerable to blows, it is a common technical means to realize the absorption of the explosion impact energy by the plastic deformation and destruction of the sacrificial layer. Considering the overall performance and actual working conditions of large-scale equipment, the design of light-weight and high-strength shock-resistant and energy-absorbing structures is of great significance for improving armor protection capabilities and ensuring armor safety.

蜂窝材料具有良好的力学性能以及轻量化的特点,目前已被广泛用于相关工程领域中。对于蜂窝结构而言,最小周期性单元的拓扑形式对宏观结构的力学性能有重大影响,例如三角形、四边形、kagome蜂窝的力学性能截然不同。通过设计单个元胞的拓扑结构,来达到提升蜂窝结构性能的目的,是研究人员的重点关注领域。随着现代装备中对质量和强度刚度等的高要求,普通形式的蜂窝结构已经难以满足其工程应用需求,具有宏微观多个尺度的层级结构设计思路对提升蜂窝结构静动态力学性能提供了技术途径。Honeycomb materials have good mechanical properties and lightweight characteristics, and have been widely used in related engineering fields. For honeycomb structures, the topological form of the smallest periodic unit has a significant impact on the mechanical properties of macroscopic structures, for example, the mechanical properties of triangular, quadrilateral, and kagome honeycombs are quite different. The purpose of improving the performance of the honeycomb structure by designing the topology of a single cell is the focus of researchers. With the high requirements for quality, strength and stiffness in modern equipment, the ordinary form of honeycomb structure has been difficult to meet the needs of its engineering applications. The hierarchical structure design idea with multiple scales of macro and micro provides a technology for improving the static and dynamic mechanical properties of honeycomb structures. way.

层级结构是具有宏微观多个尺度的结构,其中微观结构具有宏观结构类似的拓扑特征,以附加或替换宏观结构某一边或角的形式组合成新的结构。微观结构的引入,能在保持结构质量以及体积满足应用需求的前提下,显著增强结构的力学性能,目前已被应用于航空航天、工程建筑等领域中。Hierarchical structure is a structure with multiple scales of macro and micro, in which the micro structure has topological characteristics similar to the macro structure, and is combined into a new structure in the form of adding or replacing a certain side or corner of the macro structure. The introduction of microstructure can significantly enhance the mechanical properties of the structure on the premise of maintaining the structural quality and volume to meet the application requirements. It has been used in aerospace, engineering construction and other fields.

本实用新型基于多尺度层级结构设计思路,设计了一种三角层级抗冲防爆结构,与传统三角格栅结构相比,能在保持质量不变的情况下,显著提升结构的抗压特性及抗冲击特性,具有良好的工程应用前景。Based on the design idea of multi-scale hierarchical structure, the utility model designs a triangular-level impact-resistant and explosion-proof structure. Compared with the traditional triangular grid structure, the compressive characteristics and the resistance of the structure can be significantly improved under the condition of maintaining the same quality. Impact characteristics, with good engineering application prospects.

通过上述分析,现有技术存在的问题及缺陷为:普通形式的蜂窝结构已经难以满足其工程应用需求,具有宏微观多个尺度的层级结构设计思路对提升蜂窝结构静动态力学性能提供了技术途径。Through the above analysis, the existing problems and defects of the existing technology are: the common form of honeycomb structure has been difficult to meet its engineering application requirements, and the hierarchical structure design idea with macro and micro scales provides a technical way to improve the static and dynamic mechanical properties of the honeycomb structure .

实用新型内容Utility model content

为了解决现有技术存在的问题,本实用新型提供了一种多尺度的层级三角形抗冲击结构。In order to solve the problems existing in the prior art, the present invention provides a multi-scale hierarchical triangular impact-resistant structure.

本实用新型是这样实现的,一种多尺度的层级三角形抗冲击结构设置有:The utility model is realized in this way, a multi-scale hierarchical triangular impact-resistant structure is provided with:

三角层级结构;所述三角层级结构内部镶嵌有不同几何的三角型,所述三角层级设有宏观尺度三角形,所述宏观尺度三角形内部镶嵌有介观尺度三角形,所述介观尺度三角形内镶嵌有微观尺度三角形。Triangular hierarchical structure; the triangular hierarchical structure is inlaid with triangles of different geometries, the triangular hierarchy is provided with macro-scale triangles, the macro-scale triangles are inlaid with meso-scale triangles, and the meso-scale triangles are inlaid with Microscale triangles.

进一步,所述介观尺度三角形将宏观尺度三角形分割成四个区域,所述四个区域最上端为第一区域,中间为第二区域,左下端为第三区域,右下端为第四区域。Further, the mesoscopic scale triangle divides the macroscopic scale triangle into four regions, the uppermost of the four regions is the first region, the middle is the second region, the lower left end is the third region, and the lower right end is the fourth region.

进一步,所述第一区域、第三区域、第四区域内镶嵌有微观尺度三角形。Further, micro-scale triangles are inlaid in the first area, the third area and the fourth area.

进一步,所述宏观尺度三角形、介观尺度三角形和微观尺度三角结构尺寸比例均为0.5,即介观尺度三角形边长为宏观尺寸的一半,微观三角形尺寸为介观尺度三角形的一半,三种三角形之间接触无缝隙,应力波可以在结构中连续传播。Further, the size ratio of the macro-scale triangle, the meso-scale triangle and the micro-scale triangle structure is all 0.5, that is, the side length of the meso-scale triangle is half of the macro-scale size, and the micro-triangle size is half of the meso-scale triangle. There is no gap between the contacts, and the stress wave can propagate continuously in the structure.

进一步,所述多尺度层级三角形结构中宏观尺度三角形周期性布置,其单个周期性单元可以通过层级三角形的平移和旋转得到。Further, the macro-scale triangles in the multi-scale hierarchical triangular structure are periodically arranged, and a single periodic unit thereof can be obtained by translation and rotation of the hierarchical triangles.

结合上述的所有技术方案,本实用新型所具备的优点及积极效果为:Combined with all the above-mentioned technical solutions, the advantages and positive effects possessed by the present utility model are:

新型三角层级结构相较于三角格栅结构,具有更高的抗压特性和吸能特性。在静态压缩下,多尺度层级三角形比单一尺度三角格栅结构吸能特性增幅近两倍,在动态冲击下其吸能特性也有部分提高,可用于抗压和抗冲击夹芯板结构设计,具有良好的工程应用价值。Compared with the triangular grid structure, the new triangular hierarchical structure has higher compressive properties and energy absorption properties. Under static compression, the energy absorption characteristics of multi-scale hierarchical triangles are nearly doubled compared with that of single-scale triangular lattice structures, and their energy absorption characteristics are also partially improved under dynamic impact, which can be used for compression and impact resistance sandwich panel structure design. Good engineering application value.

附图说明Description of drawings

为了更清楚地说明本申请实施例的技术方案,下面将对本申请实施例中所需要使用的附图做简单的介绍,显而易见地,下面所描述的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下还可以根据这些附图获得其他的附图。In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

图1是本实用新型实施例提供的多尺度的层级三角形抗冲击结构示意图。FIG. 1 is a schematic diagram of a multi-scale hierarchical triangular impact resistance structure provided by an embodiment of the present invention.

图2是本实用新型实施例提供的单一尺度三角格栅结构与多尺度三角层级抗冲击结构示意图。2 is a schematic diagram of a single-scale triangular grid structure and a multi-scale triangular-level impact-resistant structure provided by an embodiment of the present invention.

图3是本实用新型实施例提供的三种结构在准静态压缩下和不同冲击速度下的应力应变曲线。FIG. 3 is the stress-strain curves of three structures provided by the embodiment of the present invention under quasi-static compression and different impact velocities.

图4是本实用新型实施例提供的多尺度三角层级结构与单一尺度三角格栅结构在低速(5m/s)和高速(100m/s)时的应力应变曲线图4 is a stress-strain curve diagram of a multi-scale triangular hierarchical structure and a single-scale triangular grid structure provided by an embodiment of the present invention at low speed (5m/s) and high speed (100m/s)

图中:1、宏观尺度三角形;2、介观尺度三角形;3、微观尺度三角形;4、第一区域;5、第二区域;6、第三区域;7、第四区域。In the figure: 1. Macro-scale triangle; 2. Mesoscopic-scale triangle; 3. Micro-scale triangle; 4. First region; 5. Second region; 6. Third region; 7. Fourth region.

具体实施方式Detailed ways

为了使本实用新型的目的、技术方案及优点更加清楚明白,以下结合实施例,对本实用新型进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本实用新型,并不用于限定本实用新型。In order to make the purpose, technical solutions and advantages of the present utility model more clear, the present utility model will be further described in detail below with reference to the 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.

针对现有技术存在的问题,本实用新型提供了一种多尺度的层级三角形抗冲击结构,下面结合附图对本实用新型作详细的描述。Aiming at the problems existing in the prior art, the present invention provides a multi-scale hierarchical triangular impact-resistant structure. The present invention is described in detail below with reference to the accompanying drawings.

本实用新型的目的是为了克服上述背景中存在的在一定质量约束和体积约束下三角格栅结构抗压特性、吸能特性不足等问题,而设计了一种新型三角层级抗冲防爆结构。该新型三角层级结构相较于三角格栅结构,具有更高的抗压特性和吸能特性。在静态压缩下,多尺度层级三角形比单一尺度三角格栅结构吸能特性增幅近两倍,在动态冲击下其吸能特性也有部分提高,可用于抗压和抗冲击夹芯板结构设计,具有良好的工程应用价值。The purpose of the present utility model is to design a novel triangular-level impact-resistant and explosion-proof structure in order to overcome the problems existing in the above-mentioned background, such as insufficient compressive properties and energy-absorbing properties of the triangular grid structure under certain mass and volume constraints. Compared with the triangular grid structure, the new triangular hierarchical structure has higher compressive properties and energy absorption properties. Under static compression, the energy absorption characteristics of multi-scale hierarchical triangles are nearly doubled compared with that of single-scale triangular lattice structures, and their energy absorption characteristics are also partially improved under dynamic impact, which can be used for compression and impact resistance sandwich panel structure design. Good engineering application value.

本实用新型的目的可以通过以下技术方案来实现:The purpose of the present utility model can be achieved through the following technical solutions:

本实用新型提供的多尺度三角层级抗冲击结构由m×n个层级周期单元组成,其中m为横向元胞数,n为纵向层数,m大于等于1,n大于等于1。单个层级周期单元中,存在四个多尺度层级三角形对称布置;单个层级三角形可以在宏观尺度三角形中填充一个介观尺度三角形和三个微观尺度三角形得到。多尺度三角层级抗冲击结构可应用于夹芯梁和夹芯板的设计,具有良好的抗压、抗冲击吸能特性,切实有效降低受保结构毁伤程度。The multi-scale triangular-level impact-resistant structure provided by the utility model is composed of m×n hierarchical periodic units, wherein m is the number of horizontal cells, n is the number of vertical layers, m is greater than or equal to 1, and n is greater than or equal to 1. In a single hierarchical periodic unit, there are four multi-scale hierarchical triangles symmetrically arranged; a single hierarchical triangle can be obtained by filling one mesoscale triangle and three microscale triangles in the macroscale triangle. The multi-scale triangular-level impact-resistant structure can be applied to the design of sandwich beams and sandwich panels. It has good compression resistance, impact resistance and energy absorption, and effectively reduces the damage to the insured structure.

该多尺度三角层级结构,组成材料和几何尺寸可根据具体工程应用条件进行调整。The multi-scale triangular hierarchical structure, composition materials and geometric dimensions can be adjusted according to specific engineering application conditions.

根据所设计的三角层级结构,在LS-DYNA有限元软件中建立仿真模型,组成材料为TPU,材料参数为:密度1168kg/cm3,泊松比为0.48,弹性模量为72.25Mpa,切线模量为10.74Mpa,屈服模量为2.747Mpa,应力极限为25.5417Mpa。宏观尺度三角形边长为2cm,介观和微观尺度三角形边长分别为1cm和0.5cm。为证明本实用新型所提出的多尺度三角层级结构的优异性能,建立单一尺度三角形和多尺度三角形作为对比,为确保三种结构具有相同的等效密度,宏观、介观和多尺度三角形结构壁厚分别为0.3cm、0.15cm和0.088cm。According to the designed triangular hierarchical structure, a simulation model is established in LS-DYNA finite element software. The material is TPU, and the material parameters are: density 1168kg/cm3, Poisson's ratio 0.48, elastic modulus 72.25Mpa, tangent modulus It is 10.74Mpa, the yield modulus is 2.747Mpa, and the stress limit is 25.5417Mpa. The side length of the macro-scale triangle is 2 cm, and the side length of the meso-scale and micro-scale triangle is 1 cm and 0.5 cm, respectively. In order to prove the excellent performance of the multi-scale triangular hierarchical structure proposed by the present invention, a single-scale triangle and a multi-scale triangle are established as a comparison. In order to ensure that the three structures have the same equivalent density, the macroscopic, mesoscopic and multi-scale triangular structure walls The thicknesses were 0.3 cm, 0.15 cm and 0.088 cm, respectively.

提取三种结构在准静态压缩下和不同冲击速度下的应力应变曲线,如图3所示。The stress-strain curves of the three structures under quasi-static compression and different impact velocities are extracted, as shown in Fig. 3.

为评估结构的吸能特性,根据结构在压缩和冲击下的应力应变曲线,计算结构的吸能特性:In order to evaluate the energy absorption characteristics of the structure, the energy absorption characteristics of the structure are calculated according to the stress-strain curves of the structure under compression and impact:

Figure BDA0003545752600000041
Figure BDA0003545752600000041

式中,δD为结构在压缩工况下的致密化行程,F(x)为压缩力。In the formula, δ D is the densification stroke of the structure under compression conditions, and F(x) is the compression force.

根据仿真的应力应变曲线,提取结构的致密化应变、初始峰值应力、吸能特性以及平台区平均应力,用于评价结构性能。致密化应变为结构压缩至不可压缩的阶段所需的行程,初始峰值应力则为结构进入屈服阶段所需的压缩力,平台区平均应力是结构进入屈服阶段后至致密化时的平均应力,吸能特性为结构从初始状态压缩至致密化时所需的能量。According to the simulated stress-strain curve, the densification strain, initial peak stress, energy absorption characteristics and average stress of the platform area of the structure are extracted to evaluate the structural performance. The densification strain is the travel required for the structure to compress to the incompressible stage, the initial peak stress is the compressive force required for the structure to enter the yield stage, and the average stress in the plateau region is the average stress from the structure entering the yield stage to the time of densification. The energy characteristic is the energy required to compress the structure from its initial state to densification.

图表1给出了在准静态压缩下三种结构的相关数据,图表2给出了在不同冲击速度下结构的相关数据。从中可以看出,在准静态压缩下,多尺度三角层级结构具有更加良好的抗压特性以及吸能特性。在相同质量和体积的情况下,多尺度三角层级结构抗压特性较单一尺度三角格栅结构提升了34.2%,吸能特性提升了近两倍左右。Figure 1 presents the relevant data for the three structures under quasi-static compression, and Figure 2 presents the relevant data for the structures at different impact velocities. It can be seen that under quasi-static compression, the multi-scale triangular hierarchical structure has better compressive properties and energy absorption properties. Under the same mass and volume, the compressive properties of the multi-scale triangular hierarchical structure are improved by 34.2% compared with the single-scale triangular grid structure, and the energy absorption properties are nearly doubled.

图表1Chart 1

Figure BDA0003545752600000051
Figure BDA0003545752600000051

图表2Chart 2

Figure BDA0003545752600000052
Figure BDA0003545752600000052

如图4,给出了多尺度三角层级结构与单一尺度三角格栅结构在低速(5m/s)和高速(100m/s)时的应力应变曲线图。从图中可以看出,在低速和高速冲击下,多尺度三角层级结构具有更加良好的吸能特性,且在冲击过程中,应力值波动较为平缓,更有利于对受保结构的防护。Figure 4 shows the stress-strain curves of the multi-scale triangular hierarchical structure and the single-scale triangular lattice structure at low speed (5m/s) and high speed (100m/s). It can be seen from the figure that under low-speed and high-speed impact, the multi-scale triangular hierarchical structure has better energy absorption characteristics, and during the impact process, the fluctuation of the stress value is relatively gentle, which is more conducive to the protection of the protected structure.

综上所述,本实用新型具有的技术效果为:To sum up, the technical effects of the present utility model are:

1.具有良好的抗压特性和吸能特性。相较于传统的单一尺度三角格栅结构,多尺度三角层级结构能在相同质量的前提下显著提高吸能特性,在准静态压缩式,结构的吸能特性能提高近三倍,在动态冲击时,多尺度三角层级结构的吸能特性也略高于单一尺度三角格栅结构。1. Has good compressive properties and energy absorption properties. Compared with the traditional single-scale triangular grid structure, the multi-scale triangular hierarchical structure can significantly improve the energy absorption characteristics under the premise of the same quality. When , the energy absorption properties of the multi-scale triangular hierarchical structure are also slightly higher than that of the single-scale triangular lattice structure.

2.在动态冲击工况下,多尺度三角层级结构应力应变曲线更为平缓,波动较小,这也意味着在冲击工况下,多尺度三角层级结构变形较为均匀,降低防护结构对受保结构的瞬态冲击,能更有效的保护结构。2. Under the dynamic impact condition, the stress-strain curve of the multi-scale triangular hierarchical structure is more gentle and the fluctuation is smaller, which also means that the deformation of the multi-scale triangular hierarchical structure is relatively uniform under the impact condition, which reduces the impact of the protective structure on the protected structure. The transient impact of the structure can more effectively protect the structure.

3.本文所提出的多尺度三角层级结构,具有材料和几何尺寸高度可调控的特性,可根据实际应用工况进行调整,具有良好的工程应用价值。3. The multi-scale triangular hierarchical structure proposed in this paper has the characteristics of highly adjustable material and geometric size, which can be adjusted according to the actual application conditions, and has good engineering application value.

如图1和图2所示,本实用新型实施例提供的多尺度的层级三角形抗冲击结构三角层级结构内部镶嵌有不同几何的三角型,三角层级设有宏观尺度三角形1,宏观尺度三角形1内部镶嵌有介观尺度三角形2,介观尺度三角形2内镶嵌有微观尺度三角形3。As shown in FIG. 1 and FIG. 2 , the multi-scale hierarchical triangular impact-resistant structure provided by the embodiment of the present invention is inlaid with triangles of different geometries inside the triangular hierarchical structure, and the triangular level is provided with a macro-scale triangle 1. A mesoscopic scale triangle 2 is inlaid, and a microscopic scale triangle 3 is inlaid in the mesoscopic scale triangle 2 .

介观尺度三角形2将宏观尺度三角形1分割成四个区域,四个区域最上端为第一区域4,中间为第二区域5,左下端为第三区域6,右下端为第四区域7。The meso-scale triangle 2 divides the macro-scale triangle 1 into four regions. The uppermost of the four regions is the first region 4 , the middle is the second region 5 , the lower left end is the third region 6 , and the lower right end is the fourth region 7 .

第一区域4、第三区域6、第四区域7内镶嵌有微观尺度三角形3。Micro-scale triangles 3 are embedded in the first area 4 , the third area 6 and the fourth area 7 .

宏观尺度三角形1、介观尺度三角形2和微观尺度三角形3结构尺寸比例均为0.5,即介观尺度三角形2边长为宏观尺度三角形1尺寸的一半,微观尺度三角形3尺寸为介观尺度三角形2的一半,三种三角形之间接触无缝隙,应力波可以在结构中连续传播。The macro-scale triangle 1, the meso-scale triangle 2 and the micro-scale triangle 3 all have a structure size ratio of 0.5, that is, the side length of the meso-scale triangle 2 is half the size of the macro-scale triangle 1, and the size of the micro-scale triangle 3 is the size of the meso-scale triangle 2. In half of the triangles, there is no gap in contact between the three triangles, and the stress wave can propagate continuously in the structure.

多尺度层级三角形结构中宏观尺度三角形周期性布置,其单个周期性单元可以通过层级三角形的平移和旋转得到。The macro-scale triangles are periodically arranged in the multi-scale hierarchical triangular structure, and its single periodic unit can be obtained by the translation and rotation of the hierarchical triangles.

本实用新型多尺度的层级三角形抗冲击结构的工作原理:宏观尺度三角形1内部镶嵌有介观尺度三角形2,介观尺度三角形2内镶嵌有微观尺度三角形3。新型三角层级结构相较于三角格栅结构,具有更高的抗压特性和吸能特性。在静态压缩下,多尺度层级三角形比单一尺度三角格栅结构吸能特性增幅近两倍,在动态冲击下其吸能特性也有部分提高,可用于抗压和抗冲击夹芯板结构设计,具有良好的工程应用价值。The working principle of the multi-scale hierarchical triangular impact-resistant structure of the present invention: a macro-scale triangle 1 is inlaid with a meso-scale triangle 2, and a meso-scale triangle 2 is inlaid with a micro-scale triangle 3. Compared with the triangular grid structure, the new triangular hierarchical structure has higher compressive properties and energy absorption properties. Under static compression, the energy absorption characteristics of multi-scale hierarchical triangles are nearly doubled compared with that of single-scale triangular lattice structures, and their energy absorption characteristics are also partially improved under dynamic impact, which can be used for compression and impact resistance sandwich panel structure design. Good engineering application value.

在本实用新型的描述中,除非另有说明,“多个”的含义是两个或两个以上;术语“上”、“下”、“左”、“右”、“内”、“外”、“前端”、“后端”、“头部”、“尾部”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本实用新型和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本实用新型的限制。此外,术语“第一”、“第二”、“第三”等仅用于描述目的,而不能理解为指示或暗示相对重要性。In the description of the present utility model, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer" ", "front end", "rear end", "head", "tail" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present utility model and simplifying the description, Rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

以上所述,仅为本实用新型的具体实施方式,但本实用新型的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本实用新型揭露的技术范围内,凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等,都应涵盖在本实用新型的保护范围之内。The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be covered within the protection scope of the present invention.

Claims (5)

1. A multi-scale hierarchical triangular impact-resistant structure, characterized in that it is provided with:
a triangular hierarchy;
the triangular structure is characterized in that triangular shapes with different geometries are embedded in the triangular hierarchical structure, a macro-scale triangle is arranged on the triangular hierarchy, an mesoscale triangle is embedded in the macro-scale triangle, and a micro-scale triangle is embedded in the mesoscale triangle.
2. The multi-scale, hierarchical, triangular impact-resistant structure according to claim 1, wherein the mesoscale triangles divide the macroscale triangle into four regions, the four regions being a first region at the top, a second region in the middle, a third region at the bottom left, and a fourth region at the bottom right.
3. The multi-scale, hierarchical triangular impact-resistant structure of claim 2, wherein micro-scale triangles are embedded within the first, third, and fourth regions.
4. The multi-scale hierarchical triangular impact-resistant structure according to claim 1, wherein the dimensional proportions of the macro-scale triangle, the meso-scale triangle and the micro-scale triangle are all 0.5, that is, the side length of the meso-scale triangle is half of the macro size, the size of the micro-scale triangle is half of the meso-scale triangle, the three triangles are contacted without a gap, and the stress wave can be continuously propagated in the structure.
5. The multi-scale, hierarchical, triangular impact-resistant structure according to claim 1, wherein the macro-scale triangles of the multi-scale, hierarchical, triangular structure are periodically arranged, and the single periodic unit of the macro-scale triangles of the multi-scale, hierarchical, triangular structure can be obtained by translation and rotation of the hierarchical triangles.
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