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드로잉-아이어닝 공정의 귀생김 예측을 위한 유한요소해석
김석년(S. N. Kim),이명규(M. G. Lee),Fre deric Barlat(F. Barlat) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
The earing predictability of the finite element (FE) analysis in the drawing-ironing process was evaluated by using a quadratic anisotropic yield function developed by Hill and a non-quadratic anisotropic yield function developed by Barlat and his coworkers. High anisotropic aluminum alloy (AA5042) and low anisotropic steel (AKDQ; aluminum killed drawing quality) steel were experimentally investigated in NUMISHEET 201 I for benchmark problem. From the mechanical properties provided by the benchmark, the anisotropic coefficients for the yield functions were calculated and the forming process was simulated by using the FE-code, ABAQUS with UMAT. The FE simulations for the earing profiles along the material directions and the punch force-stroke behaviors were compared with experimental results.