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Stress-based predictions of formability and failure in incremental sheet forming
This research investigates the deformation mechanism in incremental sheet forming (ISF) with relation to necking and failure. A strain-based forming limit criterion is widely used in sheet-metal forming industry to predict necking. However, this criterion is strictly valid only when the strain path is linear throughout the deformation process. Where the strain path in ISF is often found to be severely nonlinear throughout the deformation history. Therefore, the practice of using a strain-based forming limit criterion often leads to erroneous assessments of formability and failure prediction. On the other hands, stress-based forming limit is insensitive against any changes in the strain path and hence it is used to model the necking and fracture limits. Simulation model is evaluated for a single point incremental forming using AA 6022-T4E32 and checked the accuracy against experiments.
History
Event
Numerical Simulation 3D Sheet Metal Forming Processes. Conference and Workshop (9th : 2014 : Melbourne, Victoria)Volume
1567Pagination
816 - 819Publisher
AIP PublishingLocation
Melbourne, Vic.Place of publication
Melville, N.Y.Publisher DOI
Start date
2014-01-06End date
2014-01-10ISSN
0094-243XISBN-13
9780735411951Language
engPublication classification
E Conference publication; E1 Full written paper - refereedCopyright notice
2014, AIP PublishingEditor/Contributor(s)
J Yoon, B Rolfe, J Beynon, P HodgsonTitle of proceedings
NUMISHEET 2014 : Proceedings of the 9th International Conference and Workshop on Numerical Simulation 3D Sheet Metal Forming ProcessesUsage metrics
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