An exact solution for the elastic/plastic bending of anisotropic sheet metal under conditions of plane strain

• Published in: International journal of mechanical sciences Vol. 43; no. 8; pp. 1871 - 1880
• Main Authors: Chakrabarty, J, Lee, W.B, Chan, K.C
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2001; Elsevier
• Subjects: Anisotropy; Applied sciences; Bending (deformation); Bending theory; Elastic/plastic deformation; Elastoplasticity; Exact sciences and technology; Fractures; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Strain hardening; Bending theory; Anisotropy; Elastic/plastic deformation; Inelasticity; Plastic flow; Elastoplasticity; Yield criterion; Sheet metal; Plane strain; Bending; Anisotropic medium; Strain hardening; Press bending; Exact solution
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/S0020-7403(01)00009-1

A theoretical analysis for the elastic/plastic bending of sheet metal exhibiting a state of normal anisotropy is considered in this paper, assuming a plane strain condition to exist in the deformation process. The material is supposed to yield according to Hill's quadratic yield criterion and its associated normality rule of plastic flow. The relationship between the bending couple and the curvature of the bent sheet is presented in a graphical form that reveals the influence of anisotropy and strain-hardening on the bending characteristic of the sheet metal. The results indicate that the elementary bending theory significantly overestimates the magnitude of the bending couple to produce a given elastic/plastic curvature of the bent sheet.