Modeling of shear ductile fracture considering a changeable cut-off value for stress triaxiality

Lou,Y, Yoon,J and Huh,H 2014, Modeling of shear ductile fracture considering a changeable cut-off value for stress triaxiality, in NUMISHEET 2014 : Proceedings of the 9th International Conference and Workshop on Numerical Simulation 3D Sheet Metal Forming Processes, AIP Publishing, Melville, N.Y., pp. 567-570, doi: 10.1063/1.4850037.

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Title Modeling of shear ductile fracture considering a changeable cut-off value for stress triaxiality
Author(s) Lou,Y
Yoon,JORCID iD for Yoon,J orcid.org/0000-0002-7616-5253
Huh,H
Conference name Numerical Simulation 3D Sheet Metal Forming Processes. Conference and Workshop (9th : 2014 : Melbourne, Victoria)
Conference location Melbourne, Victoria
Conference dates 2014/1/6 - 2014/1/10
Title of proceedings NUMISHEET 2014 : Proceedings of the 9th International Conference and Workshop on Numerical Simulation 3D Sheet Metal Forming Processes
Editor(s) Yoon,JW
Stoughton,TB
Publication date 2014
Conference series Numerical Simulation 3D Sheet Metal Forming Processes Conference and Workshop
Start page 567
End page 570
Total pages 4
Publisher AIP Publishing
Place of publication Melville, N.Y.
Summary  A macroscopic ductile fracture criterion is proposed based on micro-mechanism analysis of nucleation, growth and shear coalescence of voids from experimental observation of fracture surfaces. The proposed ductile fracture model endows a changeable cut-off value for the stress triaxiality to represent effect of micro-structures, the Lode parameter, temperature, and strain rate on ductility of metals. The proposed model is used to construct fracture loci of AA 2024- T351. The constructed fracture loci are compared with experimental data covering wide stress triaxiality ranging between –0.5 and 1.0. The comparison suggests that the proposed model can provide a satisfactory prediction of ductile fracture for metals from compressive upsetting tests to plane strain tension with slanted fracture surfaces. Moreover, it is expected that the proposed model reasonably describes ductile fracture behavior in high velocity perforation simulation since a reasonable cut-off value for the stress triaxiality is coupled with the proposed ductile fracture criterion.
ISBN 9780735411951
ISSN 0094-243X
Language eng
DOI 10.1063/1.4850037
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861199 Basic Metal Products (incl. Smelting
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
ERA Research output type E Conference publication
Copyright notice ©2014, AIP Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30070050

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