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Hong-Sang Park(박홍상),Seong-Yong Yoon(윤성용),Frederic Barlat 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
In this work, an alternative way to identify a non-quadratic yield function, namely, Yld2000-2d is introduced in order to enhance the predictivity of the plane strain deformation mode. The yield function coefficients are determined by two ways: 1) analytical approach considering approximated plane strain stress and 2) inverse method where both the multiaxial stress states and R-values are involved. The characterized yield functions are comparatively studied by means of blank thickness prediction in hole expansion simulation.