Determination of thermal stress intensity factors for an interface crack in a graded orthotropic coating-substrate structure
Determination of thermal stress intensity factors for an interface crack in a graded orthotropic coating-substrate structure
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DOI：
10.1007/s10704-005-4728-7
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发表时间：
2005-06-01
影响因子：
2.5
通讯作者：
Chen, J
中科院分区：
文献类型：
--
作者：
Chen, J
通过两种不同的方法研究了渐变正交各向异性涂层和均质基材之间界面裂纹的热断裂问题。对于梯度正交各向异性涂层中的大多数材料特性假设呈指数函数变化的情况，使用积分变换和奇异积分方程技术获得了一些分析结果。为了分析更复杂材料分布的情况，提出了相互作用积分来评估裂纹功能梯度材料（FGM）的热应力强度因子，然后开发了无元素伽辽金方法（EFGM）以获得最终的数值结果。数值结果与解析结果之间取得了良好的一致性。此外，还提出了材料梯度参数和材料分布对热断裂行为的影响。
The thermal fracture problem of an interface crack between a graded orthotropic coating and the homogeneous substrate is investigated by two different approaches. For the case that most of the material properties in the graded orthotropic coating are assumed to vary as an exponential function, the integral transform and singular integral equation technique is used to obtain some analytical results. In order to analyze the case with more complex material distribution, an interaction integral is presented to evaluate the thermal stress intensity factors of cracked functionally graded materials (FGMs), and then the element-free Galerkin method (EFGM) is developed to obtain the final numerical results. The good agreement is obtained, between the numerical results and the analytical ones. In addition, the influence of material gradient parameters and material distribution on the thermal fracture behavior is also presented.