Analysis of Stress Intensity Factors of a Planar Rectangular Interfacial Crack in Three Dimensional Bimaterials

Naoaki Noda; Chun Hui Xu

doi:10.4028/www.scientific.net/KEM.353-358.2449

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 353-358Analysis of Stress Intensity Factors of a Planar...

Analysis of Stress Intensity Factors of a Planar Rectangular Interfacial Crack in Three Dimensional Bimaterials

Abstract:

In this study, a rectangular interfacial crack in three dimensional bimaterials is analyzed. First, the problem is formulated as a system of singular integral equations on the basis of the body force method. In the numerical analysis, unknown body force densities are approximated by the products of the fundamental density functions and power series, where the fundamental density functions are chosen to express a two-dimensional interface crack exactly. The calculation shows that the present method gives smooth variations of stress intensity factor along the crack front for various aspect ratios. The present method gives rapidly converging numerical results and highly satisfied boundary conditions throughout the crack boundary. It is found that the stress intensity factors K1 and K2 are determined by bimaterials constant e alone, independent of elastic modulus ratio and Poisson's ratio.

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Periodical:

Key Engineering Materials (Volumes 353-358)

Pages:

2449-2452

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.353-358.2449

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Online since:

September 2007

Authors:

Naoaki Noda, Chun Hui Xu

Keywords:

Body Force Method, Interface Crack, Singular Integral Equation, Stress Intensity Factor (SIF)

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