Transactions of Materials and Heat Treatment

Title：Necking force and critical necking dimention based on the inflectional instability of axial symmetry

Authors： Zhuzhou Institute of Technology Hu Chengwu Zou Anquan Yao Qishui

Unit：

KeyWords： Inflectional instability Necking force Critical necking dimension

ClassificationCode：TG306

year,vol(issue):pagenumber：2003,28(3):14-17

Abstract：

Two major technical parameters in the shaping process of necking, which are the necking force and dimension, are analyzed by using the major stress and energy methods. The engineering formula of the two parameters is derivated on the failure conditions of the inflectional instability of axial symmetry. The results are very valuable to determine the process of contracting mouth.

Funds：

湖南省重点学科建设项目资助

Reference：

1　胡世光等板料冷压成形原理北京:国际工业出版社,198841
2　MB .斯德洛日夫等金属压力加工原理北京:机械工业出版社,1987383,337
3　王洪义等薄壁管临界缩口尺寸及缩口力的确定锻压机械,1990(6):36

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