Damage-coupled progressive failure and yield line analyses of metal plates

Thakkar, Bhairav K. and Pandey, PC (2006) Damage-coupled progressive failure and yield line analyses of metal plates. In: Journal Of Engineering Mechanics-Asce, 132 (5). pp. 487-497.

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Abstract

Continuum damage mechanics based progressive failure analysis of an aluminum alloy AL2024-T3 plate has been carried out. Isotropic continuum damage mechanics model proposed by Chandrakanth and Pandey in 1995 has been implemented in a nonlinear finite element computational scheme based on damage-coupled and damage-uncoupled elastoplastic constitutive relationship. In order to model the progressive growth of damage and plasticity from extreme fibers toward the neutral axis, discrete layered approach has been adopted in the formulation using Ahmed's degenerate isoparametric shell element, which accounts for shear deformation. A critical damage criteria is used for determining the onset and propagation of failure in the plate. Damage-coupled and damage-uncoupled analyses have been carried out on rectangular and triangular plates of aluminum alloy Al2024-T3. Yield line patterns have been generated using extensive nonlinear progressive failure analysis and comparison with conventional yield line analysis has been made. It is envisioned that employing the methodology presented herein, yield line pattern generation for structural components with complex shapes can be obtained, which would significantly assist engineers in analysis and design of structures.

Item Type:	Journal Article
Publication:	Journal Of Engineering Mechanics-Asce
Publisher:	American Society of Civil Engineers
Additional Information:	Copyright of this article belongs to American Society of Civil Engineers
Keywords:	Engineering,Mechanical;damage; failure loads;finite element method;yield; plates;metals
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	18 Mar 2009 11:44
Last Modified:	19 Sep 2010 05:25
URI:	http://eprints.iisc.ac.in/id/eprint/18784

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