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윤정환(Yoon, Jeong Whan) 한국소성가공학회 2018 박판성형 심포지엄 Vol.2018 No.3
∙ Constitutive Models should consider both r-value and stress directionalities for accurate prediction of anisotropy. ∙ PEPS diagram can correct the offset from nonlinear strain path in forming limit and can be applied for surface crack. ∙ Stress-based forming limit and fracture model can be successfully used for general fracture applications. ∙ Mean stress contribution in M-C model gives very good correlation with observed experimental data.