Sheet Metal Forming Analysis with An Emphasis on Spring Back Deformation

Sheet Metal Forming Analysis with An Emphasis on Spring Back Deformation
Authors : Nagesh, Prof. Sunil Mangshetty, Prof. Bharth Kodli
Publication Date: 01-10-2013


Author(s):  Nagesh, Prof. Sunil Mangshetty, Prof. Bharth Kodli

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Vol.2 - Issue 10 (October - 2013)

e-ISSN:   2278-0181


Stress analysis plays important role in structural design and manufacturing. Proper stress estimation helps to prevent objects from failing during working. Spring back is mainly due to nonlinear plasticity with friction and heat loss in the material. Bauschigner effect is the main cause of this spring back phenomenon. In the present work, an analysis is carried out to find the spring back on the metal forming process is. Initially a geometrical model in plane strain approach is built using ANSYS mixed approach. The geometry is split to form mappable areas to quad meshing. Later contact elements are defined between the punch and the sheet metal and second contact pair between sheet metal and die surface. The analysis is done using Newton raphson iterative method to find the cone angle effect on spring back phenomenon. The results shows with the reduction in the cone angle all these parameters are increasing. Increasing plastic strain and residual stress are the potential sources for crack formation and propagation and eventual failure of the members.


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