Description of Anisotropy and the Bauschinger Effect on Various Types of Steel Sheets
To describe the anisotropy of sheets a sixth-order polynomial type 3D yield function is proposed.The yield function is constructed as a sum of several components of the Cazacu-Barlat function (2001) which was derived as an extension of the J2-J3 Drucker yield criterion (1949) to orthotropy using the linear transformation of the stress deviator.In this framework of modeling,the convexity of the yield locus is perfectly guaranteed.The model was validated by comparing the numerical predictions of planar anisotropy of r-values and flow stress directionality,as well as the shape of yield loci,with the corresponding experimental data on several types of steel sheets (high r-valued IF steel and SPCE,and high strength steel sheets of 440-980MPa TS grades).For most of steel sheets,the model of the sum of two J2 components,which involve eight anisotropic coefficients,is sufficient for the description of their anisotropies.For the description of the Bauchinger effect and cyclic workhardening characteristic,Yoshida-Uemori kinematic hardening model (2002a,2002b,2003) was employed,which includes a new proposal to describe non-saturation type workhardening.
Plasticity Anisotropic yield function Yoshida-Uemori kinematic hardening model Steel sheets
Fusahito Yoshida Hiroshi Hamasaki Takeshi Uemori
Department of Mechanical Science and Engineering,Hiroshima University,1-4-1 Kagamiyama,Higashi-Horos Department of Mechanical Engineering,Kindai University,Japan
国际会议
沈阳
英文
158-165
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）