A finite element analysis of quasistatic crack growth in a pressure sensitive constrained ductile layer

Roy, Chowdhury S and Narasimhan, R (2000) A finite element analysis of quasistatic crack growth in a pressure sensitive constrained ductile layer. In: Engineering Fracture Mechanics, 66 (6). pp. 551-571.

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Abstract

Polymeric adhesive layers are employed for bonding two components in a wide variety of technological applications, It has been observed that, unlike in metals, the yield behavior of polymers is affected by the state of hydrostatic stress. In this work, the effect of pressure sensitivity of yielding and layer thickness on quasistatic interfacial crack growth in a ductile adhesive layer is investigated. To this end, finite deformation, finite element analyses of a cracked sandwiched layer are carried out under plane strain, small-scale yielding conditions for a wide range of mode mixities. The Drucker-Prager constitutive equations are employed to represent the behavior of the layer. Crack propagation is simulated through a cohesive zone model, in which the interface is assumed to follow a prescribed traction-separation law. The results show that for a given mode mixity, the steady state Fracture toughness [K](ss) is enhanced as the degree of pressure sensitivity increases. Further, for a given level of pressure sensitivity, [K](ss) increases steeply as mode Il loading is approached. (C) 2000 Elsevier Science Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Engineering Fracture Mechanics
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Keywords:	Constrained ductile layer;Interface fracture;Crack growth; Pressure sensitive yielding;Finite element analysis
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	09 Aug 2010 10:11
Last Modified:	19 Sep 2010 06:13
URI:	http://eprints.iisc.ac.in/id/eprint/31149

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