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Mode-3 spontaneous crack propagation in unsymmetric functionally graded materials

Kulkarni, MG and Pal, S and Kubair, DV (2007) Mode-3 spontaneous crack propagation in unsymmetric functionally graded materials. In: International Journal of Solids and Structures, 44 (1). pp. 229-241.

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The effects of the inhomogeneous material property variation on the mode-3 crack propagation characteristics have been analyzed. The spectral form of the elastodynamic boundary integral equations are derived for a functionally graded material, which is used as the numerical tool in our analysis. The material property gradient is assumed to vary unsym-metrically in the direction normal to the fracture plane. A parametric study has been performed by systematically varying the inhomogeneity length scale. In comparison with a homogeneous material, an unsymmetric functionally graded material offers lesser fracture resistance. The fracture resistance progressively decreases with increase in inhomogeneity, quantified by the increase in crack sliding displacement jumps, crack tip velocities and accelerations. The material property inhomo-geneity affects only the transient crack propagation velocities, while the quasi-steady-state velocity remains unaltered

Item Type: Journal Article
Publication: International Journal of Solids and Structures
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Functionally graded materials;Multi-functional materials;Inhomogeneity length scale;Anti-plane shear;Spontaneous crack propagation;Spectral scheme.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 04 Aug 2008
Last Modified: 19 Sep 2010 04:48
URI: http://eprints.iisc.ac.in/id/eprint/15434

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