薄板の剛体パンチによる面外大ひずみ大変形問題の剛-粘塑性有限要素解析

概要

論文の詳細を見る
An implicit type rigid-viscoplastic finite element program is formulated to simulate a general sheet stretch-draw operation. The analysis is based on the rigid-viscoplastic membrane theory; it accounts for finite strain and displacement and embodies Hill's new theory of normal anisotropy. The features are retained to reduce the CPU time and get a efficint program for industrial applications, such as the sheet metal forming simulation, while keeping the complexity of the material plastic behavior. Special algorithms for dealing with the die contact condition, material unloading, Coulombic friction condition are developed. The accuracy of this simulation code was confirmed by the comparison with the explicit type elastic-plastic finite element analyses in case of simple forming operations such as hemispherical punch stretching of disks and one-inch whdth strips. Further this code is applied to analyse the two-dimensional DRAW-IN problem under the plane-strain hypothesis. It was demonstrated that the results are much affected by the draw-bead resistant force and the friction coefficient.
一般社団法人日本機械学会の論文
1990-01-25