受冲击玻璃破坏波传播过程分析

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (9) : 183-186.

论文

受冲击玻璃破坏波传播过程分析

冯晓伟1，刘占芳1，陈刚2，姚国文3

作者信息 +

Simulation of Failure Waves in Glasses under Shock Compression

FENG Xiao-wei1, LIU Zhan-fang1, CHEN Gang1, 2, YAO Guo-wen3

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摘要

分析平板冲击压缩下玻璃材料中破坏阵面的传播特性。结合已有实验结果，认为破坏波的传播为因试件表面微裂纹在冲击压缩下启裂、累积并向材料内部渗透过程，具有宏观扩散属性。建立玻璃材料的动态损伤本构关系及以表征材料损伤与破坏的微裂纹浓度N为传播特征的扩散方程，描述破坏波的传播过程。数值模拟冲击压缩下K8玻璃中横向应力历程，并与实验数据进行比较，结果显示两者吻合良好。

Abstract

The failure wave phenomenon was interpreted in glass media under the high velocity impact. In view of the plate impact experimental observations, the progressive percolation of microfissures into the material bulk gives rise to the failure wave phenomenon which could be regarded as a diffusion process. The dynamic damage constitutive relation and nonlinear diffusion equation were established to describe the propagation of failure wave in glasses. Numerical results are presented and compared to lateral stress gauge measurements in shocked K8 glasses. It is shown that the proposed theory and simple model can capture the essence of the failure wave phenomenon.

导出引用

冯晓伟;刘占芳;陈刚;姚国文. 受冲击玻璃破坏波传播过程分析[J]. 振动与冲击, 2013, 32(9): 183-186

FENG Xiao-wei;LIU Zhan-fang;CHEN Gang;;YAO Guo-wen. Simulation of Failure Waves in Glasses under Shock Compression[J]. Journal of Vibration and Shock, 2013, 32(9): 183-186