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Predicting the forming limit strains of tailor-welded blanks

DSpace at IIT Bombay

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Title Predicting the forming limit strains of tailor-welded blanks
 
Creator NARAYANAN, RG
NARASIMHAN, K
 
Subject line movements
sheet metals
formability
behavior
formability
welded blank
limit strain
prediction
 
Description This work aims at predicting the forming limit strains of welded blanks using a thickness gradient-based necking criterion. In order to reduce the complexity and synergistic effect of tailor-welded blank (TWB) parameters, the same material and thickness sheets are considered for the entire work. The forming limit curve (FLC) of welded blanks for varied weld conditions - namely, weld orientation and location - are predicted by simulating the limit dome height (LDH) test using PAM-STAMP (ESI Group, PAM System International), a finite element code. The un-welded blank and TWB FLCs thus predicted by the thickness gradient-based necking criterion are compared with the experimental FLCs obtained by LDH test. Dome height at failure and failure location data of TWBs from experiments and prediction are also compared for varied weld conditions. It is found from the analyses that limit strain predictions correlate well (less than five per cent error) with the experimental results in the drawing region of the forming limit diagram, with the stretching region showing considerable difference. Dome height at failure and failure location prediction correlate well with those of experimental observation in most of the cases. In a few TWB cases, where considerable difference in limit strains are seen, predicted dome height at failure values deviates from experimental results.
 
Publisher PROFESSIONAL ENGINEERING PUBLISHING LTD
 
Date 2011-08-27T08:28:14Z
2011-12-26T12:57:49Z
2011-12-27T05:45:28Z
2011-08-27T08:28:14Z
2011-12-26T12:57:49Z
2011-12-27T05:45:28Z
2008
 
Type Article
 
Identifier JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN, 43(7), 551-563
0309-3247
http://dx.doi.org/10.1243/03093247JSA445
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11602
http://hdl.handle.net/10054/11602
 
Language en