Title

Dynamic crack-tip stress and displacement fields under thermomechanical loading in functionally graded materials

Document Type

Conference Proceeding

Date of Original Version

9-1-2008

Abstract

Thermomechanical stress and displacement fields for a propagating crack in functionally graded materials (FGMs) are developed using displacement potentials and asymptotic analysis. The shear modulus, mass density, and coefficient of thermal expansion of the FGMs are assumed to vary exponentially along the gradation direction. Temperature and heat flux distribution fields are also derived for an exponential variation of thermal conductivity. The mode mixity due to mixed-mode loading conditions around the crack tip is accommodated in the analysis through the superposition of opening and shear modes. Using the asymptotic stress fields, the contours of isochromatics (contours of constant maximum shear stress) are developed and the results are discussed for various crack-tip thermomechanical loading conditions. Copyright © 2008 by ASME.

Publication Title

Journal of Applied Mechanics, Transactions ASME

Volume

75

Issue

5

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