Evolution of Yield Surface in the 2D and 3D Stress Spaces
Resource
International Journal of Solids and Structures, Vol.48, pp.1054-1069
Journal
International Journal of Solids and Structures
Pages
1054-1069
Date Issued
2011
Date
2011
Author(s)
Abstract
Initial and subsequent yield surfaces for 6061 aluminum, determined by a method of automated yield stress probing, are presented in the 2D (σzz - σθz) and 3D (σ θθ - σzz - σθz) stress spaces. In the (σzz - σθz) space, yield surfaces at small pre-strains show the noses and unapparent cross effect. At larger pre-strains, they become ellipses with positive cross effect. In the (σθθ - σzz - σ θz) space, the initial yield surface is not well described by von Mises yield criterion due to material anisotropy. The yield surfaces of various torsional pre-strains show obvious rotation around the σzz axis but they do not rotate when subjected to axial pre-strains. Therefore, the rotation behavior of yield surface is pre-strain path dependent. The rotation of yield surfaces in the 3D space is the emphasis of the present paper. Coupled axial-torsional behavior subjected to torsion after axial pre-strain are also presented for the same material that is used to determine the yield surfaces. This information is useful for verification of constitutive models. © 2010 Elsevier Ltd. All rights reserved.
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
International Journal of Solids and Structures, Vol.48, pp.1054-1069.pdf
Size
2.61 MB
Format
Adobe PDF
Checksum
(MD5):e0fbef798080255b2263fb87e834d371