On the basis of the rigid viscoplastic FEM theory, a surface defect prediction method for the plastic forming process by FEM numerical simulation has been thoroughly studied. 摘要基于剛粘塑性有限元基本理論,本文深入地研討了通過(guò)有限元數值模擬來(lái)預測塑性成形問(wèn)題中一類(lèi)表面缺陷生成的方法。