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Mode-3 spontaneous crack propagation in symmetric functionally graded materials

Pal, S and Kulkarni, MG and Kubair, DV (2007) Mode-3 spontaneous crack propagation in symmetric functionally graded materials. In: International Journal of Solids and Structures, 44 (1). pp. 242-254.

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Abstract

The effects of spatially varying the material properties on the mode-3 planar crack propagation characteristics are numerically investigated. The spectral scheme that is available for homogeneous materials is modified to account for the symmetrically varying material properties. Crack propagation in hardening, softening and unsymmetric type of functionally graded have been simulated. A parametric study was performed by systematically varying the material inhomogeneity length scale. Our study indicated that softening and unsymmetric graded materials reduce the resistance to fracture, while a hardening material offers higher fracture resistance with increase in inhomogeneity. Only the transient phase of crack propagation speed was affected by the material property variation, irrespective of whether the material was hardening, softening or an unsymmetric type. The crack always reached a quasi-steady-state velocity, which remained unaffected by the material property inhomogeneity.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Functionally graded materials;Multi-functional materials;Unsymmetric graded materials;Symmetric graded materials;Inhomogeneity length scale;Anti-plane shear;Spontaneous crack propagation
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 23 Jan 2007
Last Modified: 19 Sep 2010 04:34
URI: http://eprints.iisc.ernet.in/id/eprint/9569

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