Post-Bifurcation Behavior of Wrinkles in Sheet Metal Forming

板材成形是批量生产众多商业产品的基本制造工艺。在板料成形中，起皱是一种主要的失效类型，长期以来一直被人们所认识，但仍有待解决。起皱可能发生在成形过程的任何阶段，包括回弹阶段。金属薄板产品的验收取决于最终的物理状态，而最终物理状态可以通过后分叉分析和回弹分析来确定。后分叉分析描述了皱纹在萌生后的生长或衰退。这项研究将试图开发一种包括皱纹分叉后行为在内的皱纹问题的一般解决方案。

Sheet metal forming is a basic manufacturing process for the mass production of numerous commercial products. In sheet metal forming, wrinkling is a major type of failure which has been recognized for a long time but remains to be solved. Wrinkling may occur in any stage of a forming process including the springback stage. The acceptance of a sheet metal product depends on the final physical state which may be determined by a post-birfurcation analysis and a springback analysis. A post-bifurcation analysis describes the growth or decay of wrinkles after their initiation. This research will attempt to develop a general solution of the wrinkling problem including the post-bifurcation behavior of wrinkles.