TY - GEN
T1 - Description of anisotropy and the Bauschinger effect on various types of steel sheets
AU - Yoshida, Fusahito
AU - Hamasaki, Hiroshi
AU - Uemori, Takeshi
PY - 2013/6/7
Y1 - 2013/6/7
N2 - 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.
AB - 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.
KW - Anisotropic yield function
KW - Plasticity
KW - Steel sheets
KW - Yoshida-Uemori kinematic hardening model
UR - http://www.scopus.com/inward/record.url?scp=84878478621&partnerID=8YFLogxK
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U2 - 10.1063/1.4806820
DO - 10.1063/1.4806820
M3 - Conference contribution
AN - SCOPUS:84878478621
SN - 9780735411562
T3 - AIP Conference Proceedings
SP - 158
EP - 165
BT - 11th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2013
T2 - 11th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2013
Y2 - 6 July 2013 through 10 July 2013
ER -