Application of the hydroforming strain- and stress-limit diagrams to predict necking in metal bellows forming process

作者：Hashemi Ramin^*; Faraji Ghader; Abrinia Karen; Dizaji Ahmad F

来源：International Journal of Advanced Manufacturing Technology, 2010, 46(5-8): 551-561.

DOI：10.1007/s00170-009-2121-9

• Metal bellows
• Hydroforming stress-limit diagram
• FEM
• Experiment

In order to predict the initiation of necking in metal bellows forming process, a methodology for determination of the forming limit diagram and the forming limit stress diagram is represented in this paper. The methodology is based on the Marciniak and Kuczynski (M-K) model. Comparison between the experimental and theoretical results for hydroforming stress and strain-limit diagrams as predicted by different methods indicates that the present approach is suitable for prediction of necking in tube hydroforming processes. Afterwards, the implementation of the hydroforming strain- and stress-limit diagrams into finite element numerical simulations for the forming of the metal bellows is established. A satisfactory agreement between the finite element method (FEM) and test results is achieved.

• 出版日期2010-1