Constraint effects on multiple void interaction in pressure sensitive plastic solids

Subramanya, HY and Viswanath, S and Narasimhan, R (2009) Constraint effects on multiple void interaction in pressure sensitive plastic solids. In: Engineering Fracture Mechanics, 76 (8). pp. 1049-1073.

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Abstract

In this work, effects of pressure sensitive yielding and plastic dilatancy on void growth and void interaction mechanisms in fracture specimens displaying high and low constraint levels are investigated. To this end, large deformation finite element simulations are carried out with discrete voids ahead of the notch. It is observed that multiple void interaction mechanism which is favored by high initial porosity is further accelerated by pressure sensitive yielding, but is retarded by loss of constraint. The resistance curves predicted based on a simple void coalescence criterion show enhancement in fracture resistance when constraint level is low and when pressure sensitivity is suppressed.

Item Type:	Journal Article
Publication:	Engineering Fracture Mechanics
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Pressure sensitive yielding;Multiple void interaction;Constraint effects; Ductile fracture;Finite elements.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	14 Jul 2009 14:15
Last Modified:	19 Sep 2010 05:35
URI:	http://eprints.iisc.ac.in/id/eprint/21007

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