GOALI/IUCP: A Stress Based Wrinkling Criterion and Its Experimental Verification

钣金成形是最基本的制造技术之一，用于生产许多商品，包括数百种汽车零部件、消费电器和饮料罐。根据产品规格，零件上起皱的发生可以是可接受的，也可以是不可接受的。预测这种行为的能力对于缩短开发周期和降低制造成本至关重要。本研究项目将通过数值和实验研究在平面内压缩条件下，有或无正常约束条件下，在宽波长范围内屈曲的薄板的起始屈曲、后屈曲和二次屈曲行为。该研究项目在准确预测起皱发生的同时，可将有限元分析的计算时间减少80%左右。该项目的成功将对早期设计阶段的产品和工艺开发非常有益。这是大学与一个工业伙伴的合作研究项目。

Sheet metal forming is one of the most fundamental manufacturing technologies used in the production of numerous goods including hundreds of automotive components, consumer appliances, and beverage cans. The occurrence of wrinkling on a part could be either acceptable or unacceptable based on the product specifications. The ability of predicting such behavior is essential for shortening the development cycle and reducing manufacturing cost. This research project will numerically and experimentally address the onset, post-buckling and secondary buckling behavior of thin sheets buckled into a wide range of wavelengths under in-plane compression with or without normal constraints. This research project may reduce the computation time of Finite Element Analysis by about eighty percent while accurately predicting the onset of wrinkling. The success of this project will be extremely beneficial to product and process development at early design stage. This is a collaborative research project between the University and an industrial partner.