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。
The inner diameter of open die mandrelless extruded tube parts is predicted with the transient rigid plastic FEM.The prediction shows good accordance with experiments. 本文采用非穩態(tài)塑性有限元對開(kāi)式擠壓無(wú)芯棒縮管穩態(tài)成形內徑尺寸進(jìn)行了數值模擬預測，預測結果與實(shí)驗相符。
