Interface crack problem in layered orthotropic materials under thermo-mechanical loading
Interface crack problem in layered orthotropic materials under thermo-mechanical loading
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热机械载荷下层状正交各向异性材料的界面裂纹问题
DOI：
10.1016/j.ijsolstr.2014.08.007
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发表时间：
2014-12-01
影响因子：
3.6
通讯作者：
Li, Xing
中科院分区：
文献类型：
--
作者：
Ding, Sheng-Hu;Zhou, Yue-Ting;Li, Xing
本文研究了夹在两种不同功能梯度正交各向异性材料之间的均匀正交各向异性条在热载荷和机械载荷作用下的界面裂纹行为。假设界面裂纹是部分绝缘的，裂纹表面的温度下降是由于裂纹区域的热传导产生热阻的结果。假定材料的弹性性能沿厚度方向连续变化。正交异性的主要方向与裂纹方向平行和垂直。将复杂的热传导方程和弹性方程混合边界问题解析转化为奇异积分方程，用数值方法求解。本文的主要目的是研究材料非均匀性参数和无量纲热阻对热应力强度因子的影响，以便更好地了解梯度层的热行为。(C) 2014 Elsevier Ltd.版权所有。
In the present paper, the behavior of an interface crack for a homogeneous orthotropic strip sandwiched between two different functionally graded orthotropic materials subjected to thermal and mechanical loading is considered. It is assumed that interface crack is partly insulated, and the temperature drop across the crack surfaces is the result of the thermal resistance due to the heat conduction through the crack region. The elastic properties of the material are assumed to vary continuously along the thickness direction. The principal directions of orthotropy are parallel and perpendicular to the crack orientation. The complicated mixed boundary problems of equations of heat conduction and elasticity are converted analytically into singular integral equations, which are solved numerically. The main objective of the paper is to study the effects of material nonhomogeneity parameters and the dimensionless thermal resistance on the thermal stress intensity factors for the purpose of gaining better understanding of the thermal behavior of graded layer. (C) 2014 Elsevier Ltd. All rights reserved.