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A better sheet-formability test

DSpace at IIT Bombay

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Title A better sheet-formability test
 
Creator NARASIMHAN, K
MILES, MP
WAGONER, RH
 
Description Instability predictions are important in sheet-metal forming processes, one such instability being splitting failures due to localized necking. The majority of such sheet-metal industrial splitting failures occur near to the plane-strain state. Therefore, sheet-metal industries have always been looking for an ''ideal'' formability test which allows them to evaluate sheets for their ability to resist splitting failures under near plane-strain conditions. Several formability tests have been developed in the past but none have been very successful. Presently, a new test has been designed, constructed and used to evaluate the formability of different sheet materials. The results from this new test are compared with standard limiting-dome-height (LDH) tests and finite-element simulations. The results show that the new test is more reproducible, more closely follows the desirable plane strain path and takes roughly 1/6 of the time to perform relative to the LDH test. Strain measurements and finite-element simulations have revealed that the improvements are a result of the new test geometry, which produces a more stable and repeatable plane-strain state near to the splitting failure locations. The failure heights in the new tests were predicted using a section analysis finite-element program, SHEET-S.
 
Publisher ELSEVIER SCIENCE SA LAUSANNE
 
Date 2011-10-22T09:11:36Z
2011-12-15T09:10:50Z
2011-10-22T09:11:36Z
2011-12-15T09:10:50Z
1995
 
Type Article; Proceedings Paper
 
Identifier JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,50,385-394
0924-0136
http://dx.doi.org/10.1016/0924-0136(94)01400-U
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14861
http://hdl.handle.net/100/1693
 
Source 2nd International Conference on Numerical Simulation of 3-D Sheet Metal Forming Processes (NUMISHEET 93),ISEHARA, JAPAN,AUG 31-SEP 02, 1993
 
Language English