Abstract
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.
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Chen, J. Determination of thermal stress intensity factors for an interface crack in a graded orthotropic coating-substrate structure. Int J Fract 133, 303–328 (2005). https://doi.org/10.1007/s10704-005-4728-7
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DOI: https://doi.org/10.1007/s10704-005-4728-7