摘要
根据功能梯度特性的概念,建立了具有递变屈服强度梯度特性的圆形蜂窝结构数值仿真模型。在此模型的基础上详细讨论了递变屈服强度梯度和冲击速度对圆形蜂窝材料面内冲击性能的影响。研究结果表明递变梯度值对蜂窝结构的变形模式有较大影响。通过合理地选择蜂窝结构的递变屈服强度梯度值,进入被保护结构的应力值明显降低,蜂窝材料的能量吸收能力也得到有效控制。该结果能为完善屈服强度梯度蜂窝材料的研究和设计提供理论指导。
Based on the concept of functionally gradient characteristics, a numerical simulation model of honeycombs with graded yield stress is developed. The effects of graded yield stress and impact velocity on the in-plane impact performance are discussed in detail. The research results show that the deformation modes are dependent on the values of graded yield stress. Through proper adjustment of the yield stress gradient, the values of the stress transmitted into the structures can be greatly reduced and the energy absorption can be controlled effectively. These results can provide theoretical guidance for the study and design of yield stress graded honeycombs.
出处
《工程力学》
EI
CSCD
北大核心
2016年第2期172-178,共7页
Engineering Mechanics
基金
国防基础科研项目(B2620110005)
关键词
蜂窝材料
屈服强度梯度
平台应力
变形模式
能量吸收
honeycomb
graded yield stress
plateau stress
deformation modes
energy absorption
