Thermo-elastic analysis of a cracked substrate bonded to a coating using the hyperbolic heat conduction theory
In this paper,the dynamic thermal stresses around a crack in a substrate bonded to a coating are obtained using the hyperbolic heat conduction theory.Fourier and Laplace transforms are applied and the hyperbolic heat conduction and thermo-elastic crack problems are reduced to solving singular integral equations.The crack kinking phenomenon under thermal loading is investigated by applying the criterion of maximum hoop stress.Numerical results show that the hyperbolic heat conduction parameters,the material properties and the geometric size of the composite have significant influence on the dynamic stress field.It seems that high temperature loading on the surface may lead to crack kinking away from the surface and low temperature loading may cause crack kinking toward the coating.Moreover,the hyperbolic heat conduction theory may give more conservative results than that the Fouriers heat conduction theory.
Cracked Substrate Coating Hyperbolic heat conduction Singular integral equations Crack kinking
Zengtao Chen Keqiang Hu
Department of Mechanical Engineering,University of New Brunswick,Fredericton NB E3B 5A3,Canada
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）