Numerical simulations of crack tip fields in polycrystalline plastic solids

Sreeramulu, K and Sharma, P and Narasimhan, R and Mishra, Raja K (2010) Numerical simulations of crack tip fields in polycrystalline plastic solids. In: Engineering Fracture Mechanics, 77 (8). pp. 1253-1274.

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Abstract

In this paper, modes I and II crack tip fields in polycrystalline plastic solids are studied under plane strain, small scale yielding conditions. Two different initial textures of an Al-Mg alloy, viz.,continuous cast AA5754 sheets in the recrystallized and cold rolled conditions, are considered. The former is nearly-isotropic, while the latter displays distinct anisotropy. Finite element simulations are performed by employing crystal plasticity constitutive equations along with a Taylor-type homogenization as well as by using the Hill quadratic yield theory. It is found that significant texture evolution occurs close to the notch tip which profoundly influences the stress and plastic strain distributions. Also, the cold rolling texture gives rise to higher magnitude of plastic strain near the tip. (C) 2010 Elsevier 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:	Modes I and II;Crack tip fields;Texture;Plastic anisotropy; Finite elements
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	13 Jul 2010 04:44
Last Modified:	19 Sep 2010 06:11
URI:	http://eprints.iisc.ac.in/id/eprint/29231

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