Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24350
Title: Dislocation-model of limit strain prediction in aluminum sheet metals under biaxial deformation
Authors: Lee, WB 
Wen, XY
Issue Date: 2000
Publisher: SAGE Publications
Source: International journal of damage mechanics, 2000, v. 9, no. 3, p. 286-301 How to cite?
Journal: International journal of damage mechanics 
Abstract: The development of strain inhomogeneity and fracture events are influenced to a great extent by the local properties of the microstructures. The effect of dislocation hardening is incorporated into a rate sensitive crystal plasticity model for the prediction of limit strain in biaxial deformation. The assumption of a pre-existing surface groove defect in the Marciniak-Kuczynski method of limit strain prediction is relaxed, and the surface defect is seen to arise from the differential deformation between two colonies of grains with different crystallographic orientations. With the use of a modified localized necking criterion which incorporates the changes in the dislocation density, the limit strain of a sheet metal with two ideal orientations is predicted.
URI: http://hdl.handle.net/10397/24350
ISSN: 1056-7895
EISSN: 1530-7921
DOI: 10.1177/105678950000900305
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