Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26212
Title: Numerical study on deformation behaviors of thin-walled tube NC bending with large diameter and small bending radius
Authors: Li, H 
Yang, H
Yan, J
Zhan, M
Keywords: Defects
Deformation behaviors
FE
NC bending
Thin-walled tube
Issue Date: 2009
Publisher: Elsevier
Source: Computational materials science, 2009, v. 45, no. 4, p. 921-934 How to cite?
Journal: Computational materials science 
Abstract: With respect to wrinkling, wall thinning and cross section deformation, combined with analytical description, the deformation behaviors of thin-walled tube NC bending with large diameter D/t (50.0-87.0) and small bending radius Rd/D (1.0-2.0) are explored via a series of reliable 3D-FE models under ABAQUS platform. The results show that: (1) The segmentation feature is observed for the deformation fields such as effective compressive/tensile regions τc / τt, stress/strain distributions, wrinkling tendency, wall thinning and cross section deformation. With smaller Rd/D, the tangent stress increases and becomes more inhomogenous. The maximum tangent stress σφ at the intrados increases by 46% with Rd/D from 2.0 to 1.2. While the distributions of σφ are nearly similar with larger D/t. With smaller Rd/D and larger D/t, the velocity variation of tube materials becomes more obvious. (2) The wrinkling tendency and cross section deformation degree Δ D increase with smaller Rd/D and larger D/t; With smaller Rd/D, both the wall thinning and thickening degrees increase. The maximum wall thinning and thickening degrees increase by 24.0% and 52.5%, respectively. However, with larger D/t, the wall thinning degree increases, while the thickening degree decreases significantly. The maximum wall thinning degree increases by 31.3%, while the maximum thickening one decreases by 58.9%.
URI: http://hdl.handle.net/10397/26212
ISSN: 0927-0256
DOI: 10.1016/j.commatsci.2008.12.018
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