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PREDICTION OF FORMING LIMITS USING HOSFORD MODIFIED YIELD CRITERION

DSpace at IIT Bombay

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Title PREDICTION OF FORMING LIMITS USING HOSFORD MODIFIED YIELD CRITERION
 
Creator PADWAL, SB
CHATURVEDI, RC
 
Subject sheet-metal
 
Description A new generalized anisotropic yield criterion has been suggested by Hosford. This criterion has been used in prediction of forming limits by Graf and Hosford using M-K analysis for a material with normal anisotropy. In this paper the effect of planar anisotropy has been incorporated and the procedure for calculation of forming limits has been modified using the approach suggested by Parmar and Mellor. The results are compared with those of Graf and Hosford in the case of planar isotropy to validate the model and procedure. The results are also compared with the predictions of the M-K model using Hill's old and new (after Parmar and Mellor) yield criteria as well as experimental values obtained under conditions of both in-plane and punch stretching. It is observed that the effect of planar anisotropy is negligible while the predictions are strongly dependent on exponent "a" (exponent in yield criterion), Predictions with a = 5, 6 or 8 match the experimental results much better than predictions using the M-K model with Hill's old criterion, or even the new criterion used by Parmar and Mellor.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-26T04:22:19Z
2011-12-26T12:57:16Z
2011-12-27T05:47:17Z
2011-08-26T04:22:19Z
2011-12-26T12:57:16Z
2011-12-27T05:47:17Z
1992
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 34(7), 541-547
0020-7403
http://dx.doi.org/10.1016/0020-7403(92)90029-G
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11190
http://hdl.handle.net/10054/11190
 
Language en