Dynamic fracture analysis of functionally graded materials under thermal shock loading by using the radial integration boundary element method
Dynamic fracture analysis of functionally graded materials under thermal shock loading by using the radial integration boundary element method
复制标题
径向积分边界元法热冲击载荷下功能梯度材料动态断裂分析
DOI：
10.1016/j.compstruct.2018.06.050
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发表时间：
2018
影响因子：
6.3
通讯作者：
Zhang Ch
中科院分区：
文献类型：
--
作者：
Zheng Baojing;Yang Yang;Gao Xiaowei;Zhang Ch
采用耦合热弹性径向积分边界元法分析了功能梯度材料在热冲击载荷作用下的动态断裂力学问题。裂纹尖端的动态应力强度因子（DSIF）由裂纹尖端附近的裂纹张开位移（COD）定义。研究了二维和三维裂纹结构中材料梯度方向与裂纹方向的耦合效应对应力强度因子的影响。结果表明，该方法对含裂纹功能梯度材料的动态断裂力学分析具有较高的精度和效率。该研究为工程设计提供了理论依据，并可扩展边界元法的应用范围。
A coupled thermoelastic radial integration boundary element method is applied to analyze the dynamic fracture mechanics of functionally graded materials (FGMs) subjected to the thermal shock loadings. The dynamic stress intensity factor (DSIF) of the crack tip is defined by the crack open displacement (COD) near the crack tip. The effects of material gradating direction versus crack direction and the coupling effects on the stress intensity factor are studied for two- and three-dimensional crack structures. The results demonstrate that the present method is very accuracy and efficiency to analyze the dynamic fracture mechanics for the cracked FGMs. The research also provides a theoretical basis for engineering design, and can extend the application range of the boundary element method.