Record Details

A new criterion to predict necking failure under biaxial stretching

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title A new criterion to predict necking failure under biaxial stretching
 
Creator KUMAR, S
DATE, PP
NARASIMHAN, K
 
Subject sheet-metal
 
Description Localized necking limits useful forming of sheet materials. Several theoretical models predict limit strains under biaxial stretching conditions. Models that assume infinite-length defects (M-K approach) or finite compact defects (FEM approach) have been successful in predicting limit strains. In both these approaches, a failure criteria is required to predict the limit strain during simulation. Failure criteria based on comparing the principal strains, strain rates in the defect and the bulk region of the deforming sheet are reviewed. A new failure criterion is developed, which is defined in terms of thickness gradients that develop during biaxial stretching. This new criterion can be used under a wide range of forming conditions to predict limit strains. FLDs predicted using the new criterion are compared to: (a) FLDs predicted by other existing criteria and (b) Experimental FLDs. The effect of material parameters on the shape of the FLDs is predicted using the new criterion.
 
Publisher ELSEVIER SCIENCE SA LAUSANNE
 
Date 2011-10-22T08:34:49Z
2011-12-15T09:10:50Z
2011-10-22T08:34:49Z
2011-12-15T09:10:50Z
1994
 
Type Article; Proceedings Paper
 
Identifier JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,45,583-588
0924-0136
http://dx.doi.org/10.1016/0924-0136(94)90402-2
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14855
http://hdl.handle.net/100/1686
 
Source 5th International Conference on Metal Forming: Metal Forming 94,BIRMINGHAM, ENGLAND,SEP 13-15, 1994
 
Language English