Path-independent forming limit models for multi-stage forming processes

Dick, Robert Earl, Yoon, Jeong Whan and Stoughton, Thomas B. 2016, Path-independent forming limit models for multi-stage forming processes, International journal of material forming, vol. 9, no. 3, pp. 327-337, doi: 10.1007/s12289-015-1220-4.

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Title Path-independent forming limit models for multi-stage forming processes
Author(s) Dick, Robert EarlORCID iD for Dick, Robert Earl
Yoon, Jeong WhanORCID iD for Yoon, Jeong Whan
Stoughton, Thomas B.
Journal name International journal of material forming
Volume number 9
Issue number 3
Start page 327
End page 337
Total pages 11
Publisher Springer
Place of publication Berlin, Germany
Publication date 2016-07
ISSN 1960-6206
Keyword(s) forming limit
stress-based FLC
polar EPS
multi-stage forming
nonlinear strain path
Summary Many practitioners of the metal forming community remain faithful to the idea that strain metrics are useful for formability assessment. However, it is only valid when deformation occurs along linear strain paths. Current simulations of multi-stage sheet forming processes for rigid-packaging and automotive components result in higher rejection rates due to the inaccuracy of forming and fracture limit models. In this work, we establish a new approach considering path-independency in forming limits based on the stress-based forming limit and polar EPS (Effective Plastic Strain) diagram which appear to be an effective solution for nonlinear effects. The related theory has been implemented into a user material model in commercial software.
Language eng
DOI 10.1007/s12289-015-1220-4
Field of Research 091207 Metals and Alloy Materials
091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Springer
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