Thermal weight functions for bi-material interface crack system using energy principles

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Abstract

In this study, Betti's reciprocal theorem and the principle of superposition are used to obtain weight functions in a two-dimensional bi-material interface crack system for any loading, in general and thermal loading, in particular. It is shown that the general expression of weight functions for bi-materials interface crack problems is of the same type as that found in a homogeneous mixed mode loading case. Furthermore, a computational approach has been developed for calculation of thermal stress intensity factors for bi-material interface cracks subjected to thermal loading under quasi-static uncoupled thermo-elasticity assumption. The thermal weight function (TWF) expression and computational scheme have been validated using three examples given in the available literature. © 2008 Elsevier Ltd. All rights reserved.

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Khandelwal, R., & Chandra Kishen, J. M. (2008). Thermal weight functions for bi-material interface crack system using energy principles. International Journal of Solids and Structures, 45(24), 6157–6176. https://doi.org/10.1016/j.ijsolstr.2008.07.013

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