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Prediction of FLD of sheet metals based on crystal plasticity model
conference contribution
posted on 2014-01-01, 00:00 authored by J-B Kim, S-H Hong, Jeong YoonJeong YoonIn some advanced sheet metal forming processes such as the incremental forming process, a local fracture strain after necking is very important. In order to accurately predict necking and fracture phenomena, a crystal plasticity model is introduced in the finite element analysis of tensile tests. A tensile specimen is modeled by many grains that have their own crystalline orientation. And each of the grains is discretized by many elements. Using this analysis, necking behavior of a tensile specimen can be predicted without any initial imperfections. A damage model is also implemented to predict sudden drops of load carrying capacity after necking and to reflect the void nucleation and growth of the severely deformed region. From an analysis of the tensile test, the necking behavior is well predicted. Finally, analyses are carried out for various strain paths, and FLDs up to necking and fracture are predicted.
History
Event
Numerical Simulation 3D Sheet Metal Forming Processes. Conference and Workshop (9th : 2014 : Melbourne, Victoria)Volume
1567Pagination
374 - 377Publisher
AIP PublishingLocation
Melbourne, VictoriaPlace 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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