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Shape optimization of shear fracture specimen considering plastic anisotropy
conference contribution
posted on 2017-01-01, 00:00 authored by Shunying ZhangShunying Zhang, Jeong YoonJeong Yoon, S Lee, Yanshan LouIt is important to fabricate fracture specimens with minimum variation of triaxiality in order to characterize the failure behaviors experimentally. Fracture in ductile materials is usually calibrated by uniaxial tensile, shear and plane strain tests. However, it is often observed that triaxiality for shear specimen changes severely during shear fracture test. The nonlinearity of triaxiality is most critical for shear test. In this study, a simple in-plane shear specimen is optimized by minimizing the variation of stress triaxiality in the shear zone. In the optimization, the Hill48 and Yld2000-2d criteria are employed to model the anisotropic plastic deformation of an aluminum alloy of 6k21. The evolution of the stress triaxiality of the optimized shear specimen is compared with that of the initial design of the shear specimen. The comparison reveals that the stress triaxiality changes much less for the optimized shear specimen than the evolution of the stress triaxiality with the original design of the shear specimen.
History
Event
European Scientific Association for Material Forming. Conference (20th : 2017 : Dublin, Ireland)Volume
1896Series
European Scientific Association for Material Forming ConferencePagination
070005-1 - 070005-6Publisher
AIP PublishingLocation
Dublin, IrelandPlace of publication
Melville, N.Y.Publisher DOI
Start date
2017-04-26End date
2017-04-28ISSN
0094-243XeISSN
1551-7616ISBN-13
9780735415805Language
engPublication classification
E1 Full written paper - refereedCopyright notice
2017, Author(s)Editor/Contributor(s)
[Unknown]Title of proceedings
ESAFORM2017 : Proceedings of the 20th Internaional ESAFORM Conference on Material FormingUsage metrics
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No categories selectedKeywords
Shape optimizationShear fracture specimenPlastic anisotropyTriaxialityEducational assessmentAlloysDeformationDuctile materialScience & TechnologyTechnologyPhysical SciencesMaterials Science, MultidisciplinaryPhysics, AppliedMaterials SciencePhysicsDUCTILE FRACTURESTRESS-TRIAXIALITYPREDICTIONCRITERIONSHEETS
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