期刊论文

Study on Failure Mechanism of Hierarchical Corrugated Structure with a Second-order Core under Local Failure Defects

Fang, Y.

中文

固体力学学报

0254-7805

2021

42

6

656-670

10.19636/j.cnki.cjsm42-1250/o3.2021.020

51678286:国家自然科学基金 2018JJ3438:湖南省自然科学基金 20A426:湖南省教育厅重点项目 203YXC014:研究生创新项目

本校为第一机构

基于弹性梁理论,对局部失效缺陷下的二级层级褶皱结构失效机理进行了分析.通过对原结构体系和局部失效后新结构体系的受力分析,归纳总结了结构的六种失效模式.根据各失效模式之间的占优关系绘制了失效机理图,讨论了参数l1/l、θ和α对失效机理图的影响,并基于特定失效序列优化约束,给出了结构轻量化优化列式.通过数值仿真,验证了局部失效后二级层级褶皱结构失效预测的正确性和层级失效序列设计思路的可行性.最后采用3D打印模型进行了验证实验,实验结果与理论解吻合较好.

Based on the elastic beam theory, the failure mechanism of hierarchical corrugated structure with a second-order core under local failure defects was studied. Firstly, through the force analysis of the original structural system of the hierarchical corrugated structure with a second-order core and the structural system under local failure defects, six failure mechanisms of the structure were obtained, and the corresponding nominal force expressions of each failure mechanism were given. Then the failure mechanism diagram was drawn according to t...