| Mechanical metamaterials have the characteristics of unusual property,programmable design and broad prospect of application.Mechanical metamaterials have shown great potential value in various fields,which has aroused great concern from scholars at home and abroad.The origami configuration has various shapes,and the performance of the structure can be changed through shape changes,which opens up a new direction for the study of mechanical metamaterials with adjustable performance.In this paper,the compressive properties of the interleaved origami tube mechanical metamaterials are studied.First,the geometric design of the basic unit of the interleaved origami tube was carried out,the rigid foldability and the compressive performance of basic units were studied.Secondly,according to the analysis results of the basic elements,the compression properties of the rigid folded and non-rigid folding interleaved origami tube metamaterials were studied respectively.The results show that the origami-inspired mechanical metamaterials has excellent characteristics such as light weight,high strength,high energy absorption and excellent performance in designability.It can be used as energy absorption material to provide effective energy absorption protection for various engineering structures when resisting impact loads,and has a broad application prospect.For the basic unit of the interleaved origami tube metamaterials,the geometric design,the judgment of rigid foldability and the research of compression performance were carried out.The geometric control parameters of the basic unit of the interleaved origami tube were determined.By using the multi-vertex quaternion rotation sequence method and dual quaternion,the rigid foldability of the basic unit of the interleaved origami tube was judged.Therefore,the rigid folding and non-rigid folding interleaved origami tube metamaterials were obtained respectively.Using the numerical simulation,the compression performance of the basic unit of interleaved origami tube was studied,and the influence of the angle parameters on the compressive properties of the basic unit in the X/Y direction and Z direction was determined,which provided a reference for the design of the interleaved origami tube metamaterials.For the rigid folding interleaved origami tube metamaterials,the compressive properties in different directions were studied.According to the compressive deformation mode,the theoretical model of compressive stress in X/Y direction and the theoretical model of compressive mean stress in Z direction were established,which match the numerical simulation results well.The effect of angle parameters on the compressive properties of the structure was analyzed using numerical simulation.Compared with the hexagonal honeycomb structure,the Z-direction compression energy absorption characteristics of the rigid folding interleaved origami tube metamaterials perform better,and the compression performance in the X/Y direction is also better than performance of the hexagonal honeycomb structure in the X direction and Y direction,and the energy Absorption efficiency is higher.On this basis,an improved measure of adding diaphragm plates was proposed,which can improve the strength and compression performance greatly in the X/Y direction while the compression performance in the Z direction remains is basically unchanged.Compared with the hexagonal honeycomb structure,the average stress can be increased by 283%.For the non-rigid folding interleaved origami tube metamaterials,the compressive properties in different directions were studied.The results show that the compression performance of the structure in different directions can be adjusted by changing the angle parameters,and the structure has good programmability.Based on the compression performance objectives,the interleaved origami tube metamaterials is designed.The optimality of Z direction compression energy absorption properties and the balance of different direction compression energy absorption properties are taken as the objectives.Then,the interleaved origami tube metamaterials with excellent performance was determined within the parameter range. |
