Crashworthiness Design and Multi-Objective Optimization for Bio-Inspired Hierarchical Thin-Walled Structures  

作　　者：Shaoqiang Xu Weiwei Li Lin Li Tao Li Chicheng Ma 

机构地区：[1]School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo,255049,China [2]School of Mathematics and Statistics,Shandong University of Technology,Zibo,255049,China

出　　处：《Computer Modeling in Engineering & Sciences》2022年第5期929-947,共19页工程与科学中的计算机建模（英文）

基　　金：The authors are grateful to the National Natural Science Foundation of China(Grant No.11902183);the Doctoral Research Foundation of Shandong University of Technology(Grant No.4041/418017).

摘　　要：Thin-walled structures have been used in many fields due to their superior mechanical properties.In this paper,two types of hierarchical multi-cell tubes,inspired by the self-similarity of Pinus sylvestris,are proposed to enhance structural energy absorption performance.The finite element models of the hierarchical structures are established to validate the crashworthiness performance under axial dynamic load.The theoreticalmodel of themean crushing force is also derived based on the simplified super folded element theory.The finite element results demonstrate that the energy absorption characteristics and deformation mode of the bionic hierarchical thin-walled tubes are further improved with the increase of hierarchical sub-structures.It can be also obtained that the energy absorption performance of corner self-similar tubes is better than edge self-similar tubes.Furthermore,multiobjective optimization of the hierarchical tubes is constructed by employing the response surface method and genetic algorithm,and the corresponding Pareto front diagram is obtained.This research provides a new idea for the crashworthiness design of thin-walled structures.

关 键 词：Bionic structure crashworthiness design hierarchical tube multi-objective optimization 

分 类 号：TB124[理学—工程力学]