Abstract
The manufacturing process of cold-formed thin-walled steel members induces cold work which can be characterized by the co-existent residual stresses and equivalent plastic strains and has a significant effect on their structural behaviour and strength. The present paper and the companion paper are concerned with the prediction of residual stresses and co-existent equivalent plastic strains in stainless steel sections formed by the press-braking method. This manufacturing process consists of the following two distinct stages: (i) coiling and uncoiling of the sheets, and (ii) press-braking operations. This paper presents an analytical solution for the residual stresses and co-existent equivalent plastic strains that arise from the first stage. In the analytical solution, the coiling-uncoiling stage is modelled as an inelastic plane strain pure bending problem; the stainless steel sheets are assumed to obey Hill's anisotropic yield criterion with isotropic hardening to account for the effects of material anisotropy and nonlinear stress-strain behaviour. The accuracy of the solution is demonstrated by comparing its predictions with those obtained from a finite element analysis. The present analytical solution and the corresponding analytical solution for press-braking operations presented in the companion paper form an integrated analytical model for predicting residual stresses and equivalent plastic strains in press-braked stainless steel sections.
Original language | English |
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Pages (from-to) | 1803-1815 |
Number of pages | 13 |
Journal | Journal of Constructional Steel Research |
Volume | 65 |
Issue number | 8-9 |
DOIs | |
Publication status | Published - 1 Aug 2009 |
Keywords
- Coiling
- Finite element simulation
- Material anisotropy
- Plastic bending
- Residual stresses
- Stainless steel
- Uncoiling
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
- Metals and Alloys