Mixed-Mode Steady-State Crack Growth in Elastic-Plastic Solids

Dhirendra, VK and Narasimhan, R (1998) Mixed-Mode Steady-State Crack Growth in Elastic-Plastic Solids. In: Engineering Fracture mechanics, 59 (4). pp. 543-559.

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Abstract

In this paper, steady, quasi-static crack growth under plane strain conditions in an elastic-plastic material subjected to mixed-mode loading (combined mode I and mode II) is analyzed. A modified small scale yielding formulation (Journal of the Mechanics and Physics of Solids, 1993, 41, 835-861) wherein the elastic K-field as well as the T-stress are prescribed as remote boundary conditions is used. A special finite element procedure based on moving crack tip coordinates is employed to simulate steady-state crack growth in the direction ahead of the tip. The material is assumed to obey the J(2) flow; theory of plasticity, with a power-law hardening stress-strain response. The results show that the near-tip mode-mixity is dependent on the level of strain hardening, magnitude and sign of the T-stress and on the remote elastic mixity. The influence of the above parameters on the near-tip stress and deformation fields is examined and the range of remote elastic mixity that gives rise to a mode I or mode II distribution is identified.

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier Science Ltd.
Keywords:	Mixed-mode;Steady-state crack growth;Finite element
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited:	27 Mar 2006
Last Modified:	02 May 2011 07:03
URI:	http://eprints.iisc.ernet.in/id/eprint/168

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