...Anupam Agrawal; N. Venkata Reddy; P. M. Dixit Wrinkling in the flange region has been observed during redrawing operation by a few researchers. In the present work an analysis methodology, based on a combination of upper bound and energy approaches, is proposed for the prediction of number...

...Yanqiu Zhang; Debin Shan; Wenchen Xu; Yan Lv The thin-walled vessel head with the ratio of thickness to diameter less than 3‰ has long been considered to be difficult to be spun because wrinkling is very likely to occur during the thin-walled vessel head spinning process when the thickness is far...