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RESEARCH PAPERS

An Analysis of Shear Localization During Bending of a Polycrystalline Sheet

[+] Author and Article Information
R. Becker

Alcoa Technical Center, Alcoa Center, PA 15069

J. Appl. Mech 59(3), 491-496 (Sep 01, 1992) (6 pages) doi:10.1115/1.2893750 History: Received September 24, 1990; Revised September 25, 1991; Online March 31, 2008

Abstract

The development of shear localization in a polycrystalline sheet subject to pure bending is analyzed numerically using a slip-based constitutive model. The material response at each finite element integration point is determined by averaging the stiffness matrices from differently oriented FCC crystals. The effects of texture evolution, hardening, and strain-rate sensitivity are incorporated. The model predicts localized plastic deformation at both the tensile and the compressive surfaces of the sheet during bending. Comparison of the numerical results with a section of the bent sheet indicates that strain localization is predicted at the appropriate strain levels and orientations.

Copyright © 1992 by The American Society of Mechanical Engineers
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