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

Version 2 2024-06-03, 17:04
Version 1 2015-02-25, 17:54
conference contribution
posted on 2024-06-03, 17:04 authored by Y Lou, Jeong YoonJeong Yoon, H Huh
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.

History

Volume

1567

Pagination

567-570

Location

Melbourne, Victoria

Start date

2014-01-06

End date

2014-01-10

ISSN

0094-243X

ISBN-13

9780735411951

Language

eng

Publication classification

E Conference publication, E2 Full written paper - non-refereed / Abstract reviewed

Copyright notice

2014, AIP Publishing

Editor/Contributor(s)

Yoon JW, Rolfe B, Beynon J, Hodgson P

Title of proceedings

NUMISHEET 2014 : Proceedings of the 9th International Conference and Workshop on Numerical Simulation 3D Sheet Metal Forming Processes

Event

Numerical Simulation 3D Sheet Metal Forming Processes. Conference and Workshop (9th : 2014 : Melbourne, Victoria)

Publisher

AIP Publishing

Place of publication

Melville, N.Y.

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