Diamond折纸管状结构轴向冲击性能分析

Analysis of Diamond-Patterned Origami Tubes Under Axial Crushing Forces

为了降低薄壁管状结构受轴向冲击时的初始峰值载荷,将diamond刚性折纸模型引入到薄壁管状结构的设计中.利用有限元分析方法,以方形截面为例,分析了diamond折纸管状结构的轴向冲击性能.结果表明:相比于传统方形薄壁管,diamond折纸管状结构具有较低的初始峰值载荷和更加平稳的变形过程.得出了diamond折纸管状结构按折纸预折形式变形的临界条件.分析了diamond折纸管状结构在轴向冲击载荷作用下,底角对初始峰值载荷和平均冲击载荷的影响.

The diamond pattern was introduced into thin-wall tubes to reduce the initial peak forces during axial crushing processes.The finite element method was used to analyze the performance of diamond-patterned origami tubes with square cross sections.The results show that the diamond-patterned origami tubes have lower initial peak forces but more steady crushing processes-in comparison with the corresponding straight-wall tubes.The critical conditions were obtained for the origami tubes with buckling modes agreeing with the diamond pattern creases.The relationships between the sector angle of the origami tube and the initial peak force as well as the mean crushing force under axial impact were also studied.