Finite element simulations of ductile rupture in a constrained metal foil

Chowdhury, Roy S and Narasimhan, R (1995) Finite element simulations of ductile rupture in a constrained metal foil. In: Materials Science and Engineering A, 191 (1-2). pp. 27-37.

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Abstract

A numerical study of the ductile rupture in a metal foil constrained between two stiff ceramic blocks is performed. The finite element analysis is carried out under the conditions of mode I, plane strain, small-scale yielding. The rate-independent version of the Gurson model that accounts for the ductile failure mechanisms of microvoid nucleation, growth and coalescence is employed to represent the behavior of the metal foil. Different distributions of void nucleating sites in the metal foil are considered for triggering the initiation of discrete voids. The results clearly show that far-field triaxiality-induced cavitation is the dominant failure mode when the spacing of the void nucleating sites is large. On the contrary, void coalescence near the notch tip is found to be the operative failure mechanism when closely spaced void nucleating sites are considered.

Item Type:	Journal Article
Publication:	Materials Science and Engineering A
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Finite element method;Ductile rupture;Metal foil
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	18 May 2011 10:29
Last Modified:	18 May 2011 10:29
URI:	http://eprints.iisc.ac.in/id/eprint/37739

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