Numerical modeling and simulation of failure waves propagation in brittle glasses under planar shock loading

摘要：

　　Shocked brittle glasses suffer a particular failure mode in which they lose strength behind a propagating front that is known as a failure wave.This failure behavior is one of typical nonlinear problems in impact engineering.To describe this particular impact failure response, a complete fracture model was proposed in this article.A nonlinear diffusion equation with the internal variable of macroscopic microcracks concentration was used to govern the propagation of failure wave.The dynamic failure constitutive relation was applied to simulate the evolution histories of the longitudinal stress and lateral stress during the failure evolution.Numerical simulations were carried out and compared to the longitudinal and lateral stress gauge measurements of shocked K8 glass.The results showed that the proposed model could capture the essence of the failure wave phenomenon.

关键词： Failure wave Microcracks concentration Nonlinear diffusion equation Constitutive relation Brittle glasses

作者: Xiao-wei FENG

作者单位: Institute of Systems Engineering of China Academy of Engineering Physics, Mianyang, Sichuan, China

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 692-695

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）