二軸引張りを受ける金属多孔板の成形限界

概要

論文の詳細を見る
The forming limit diagrams of perforated sheet metals with holes have been theoretically determined by using the diffuse necking criterion and the rigid-plastic finite element method under biaxial tension. This plastic instability is decided by the condition that the external work change caused by external force change is zero. The forming limit line was presented of plates perforated with circular, elliptical and squar holes arranged in a regular penetration square pattern. It is shown that these forming limit diagrams are similar to those of Swift's diffuse necking in the case of positive strain ratio, and to those of Hill's localized necking in the case of negative strain ratio. The influence of the strain-hardening exponent, porous ratio and hole shape on these forming limit diagrams is discussed and comparison of the F. L. D. of a perforated plate with that of a nonperforated plate is made.
一般社団法人日本機械学会の論文
1989-04-25