A Rate-Dependent Damage/Decohesion Model for Simulating Glass Fragmentation under Impact using the Material Point Method
A Rate-Dependent Damage/Decohesion Model for Simulating Glass Fragmentation under Impact using the Material Point Method
复制标题
DOI：
10.3970/cmes.2009.049.023
复制
发表时间：
2009-08
影响因子：
2.4
通讯作者：
L. Shen
中科院分区：
文献类型：
--
作者：
L. Shen
本文提出了一种基于分叉的模拟程序，以探索冲击载荷下玻璃破碎过程中从局部化到脱聚的转变。在所提出的程序中，根据基于速率相关的拉伸损伤模型的分叉分析来确定玻璃不连续失效的开始和方向。质点法不涉及固定网格连接，通过简单的界面处理来适应与玻璃碎片相关的多尺度不连续性。进行了参数研究，以证明试样尺寸和冲击速度对冲击载荷下玻璃失效演变的影响。这项数值研究获得的初步结果让我们更好地了解冲击载荷下玻璃破碎背后的物理原理。
A bifurcation-based simulation procedure is proposed in this paper to explore the transition from localization to decohesion involved in the glass fragmentation under impact loading. In the proposed procedure, the onset and orientation of discontinuous failure of glass is identified from the bifurcation analysis based on a rate-dependent tensile damage model. The material point method, which does not involve fixed mesh connectivity, is employed to accommodate the multi-scale discontinuities associated with the fragmentation of glass using a simple interface treatment. A parametric study has been conducted to demonstrate the effects of specimen size and impact velocity on the evolution of glass failure under impact loading. The preliminary results obtained in this numerical study provide a better understanding of the physics behind glass fragmentation under impact loading.