Paper Title:

Development of an Inverse Routine to Predict Residual Stresses in the Material Based on a Bending Test

Periodical Key Engineering Materials (Volumes 554 - 557)
Main Theme The Current State-of-the-Art on Material Forming
Chapter Chapter 10: Inverse Analysis Optimization and Stochastic Approaches
Edited by Ricardo Alves de Sousa and Robertt Valente
Pages 949-956
DOI 10.4028/
Citation Akbar Abvabi et al., 2013, Key Engineering Materials, 554-557, 949
Online since June 2013
Authors Akbar Abvabi, Bernard Rolfe, Peter Hodgson, Matthias Weiss
Keywords Bending Tests, Inverse Approach, Residual Stress, Skin-Pass, Solid-Shell Finite Element
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Bending with unloading and reverse bending are the dominant material deformations in roll forming and hence property data derived from bend tests could be more relevant than tensile test data for numerical simulation of the roll forming process. Recent investigations have shown that residual stresses affect the material behaviour close to the yield in a bending test. So, Residual stress introduced during prior steel processing may affect the roll forming process and therefore needs to be included in roll forming simulations to achieve improved model accuracy. Measuring the residual stress profile experimentally is expensive, difficult, time consuming and has limited accuracy. Analytical models are available that allow the determination of residual stress. However, for this detailed information about the pre-processing conditions is required; this information is generally not available for roll forming materials. The main goal of this study is to develop an inverse routine that generates a residual stress profile through the thickness of the material based on pure bend test data.