차체패널 성형공정 유한요소해석에 드로우비드 전문모델의 적용

Application of Drawbead Expert Model to Finite Element Analysis of Forming Process for Auto-Body Panel

In order to show the efficiency and accuracy of an expert drawbead model, finite element simulations of auto-body panel stampings are carried out. For numerical modeling of the drawbead of a panel die, the drawbead restraining force and bead-exit thinning calculated by the expert model are imposed to a node nearest to the drawbead position as a boundary condition, Finite element simulations show that the expert model provides the accurate solution, guarantees the stable convergence, and has the merit in the computation time.