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Crack-Tip Stress Fields in FGMs under Anti-Plane Shear Impact Loading Using the Non-Local Theory

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Abstract:

A crack in an infinite plate of functionally graded materials (FGMs) under anti-plane shear impact loading is analyzed by making use of non-local theory. The shear modulus and mass density of FGMs are assumed to be of exponential form and the Poisson’s ratio is assumed to be constant. The mixed boundary value problem is reduced to a pair dual integral equations through the use of Laplace and Fourier integral transform method. In solving the dual integral equations, the crack surface displacement is expanded in a series using Jacobi’s polynomials and Schmidt’s method is used. The numerical results show that no stress singularity is present at the crack tip. The stress near the crack tip tends to increase with time at first and then decreases in amplitude and the peak values of stress decreases with increasing the graded parameters.

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Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

821-824

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.821

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Online since:

September 2007

Authors:

Xian Shun Bi, Xue Feng Cai, Jian Xun Zhang

Keywords:

Crack, Dual Integral Equations, Functionally Graded Material (FGM), Integral Transforms, Non-Local Theory

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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