FEM modeling of plastic flow and strain-induced phase transformation in BN under high pressure and large shear in a rotational diamond anvil cell

dc.contributor.author Feng, Biao
dc.contributor.author Levitas, Valery
dc.contributor.author Li, Wanghui
dc.contributor.author Levitas, Valery
dc.contributor.department Aerospace Engineering
dc.contributor.department Ames Laboratory
dc.contributor.department Mechanical Engineering
dc.contributor.department Materials Science and Engineering
dc.date 2018-10-27T05:23:10.000
dc.date.accessioned 2020-06-29T22:45:26Z
dc.date.available 2020-06-29T22:45:26Z
dc.date.copyright Mon Jan 01 00:00:00 UTC 2018
dc.date.issued 2018-01-01
dc.description.abstract <p>Combined three-dimensional plastic flow and strain-induced phase transformation (PT) in boron nitride (BN) under high pressure and large shear in a rotational diamond anvil cell (rotational DAC or RDAC) are investigated. Geometrically nonlinear frameworks including finite elastic, transformational, and plastic deformations and finite element method (FEM) are utilized. Quantitative information is obtained on the evolutions of the stress tensor, plastic strain, volume fraction of phases in the entire sample, and slip-cohesion transitions, all during torsion under a fixed compressive load in RDAC. The effects of the applied compressive stress and the sample radius on PT and plastic flow are discussed. In comparison with DAC, the same amount of the high-pressure phase can be obtained at a much lower pressure in RDAC, which reduces the required force and the risk of diamond fracture. Also, RDAC has a potential to complete PT during torsion under pressure close to the minimum possible. A quasi-homogeneous pressure can be obtained in a transforming sample in RDAC under a proper choice of properties and parameters of a gasket. A number of experimental phenomena, including the pressure self-multiplication and quasi-homogeneous pressures in DAC and RDAC, are reproduced and interpreted. The simulation results provide a significant insight into coupled PTs and plastic flow in material in RDAC, and are important for the optimum design of experiments and the extraction of material parameters for PT, as well as for the optimization and control of PTs by the variation of various parameters.</p>
dc.description.comments <p>This is a pre-print of the article Feng, Biao, Valery I. Levitas, and Wanghui Li, "FEM modeling of plastic flow and strain-induced phase transformation in BN under high pressure and large shear in a rotational diamond anvil cell." 2018.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/aere_pubs/128/
dc.identifier.articleid 1129
dc.identifier.contextkey 13158113
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath aere_pubs/128
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1972
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/aere_pubs/128/2018_Levitas_FEMModeling.pdf|||Fri Jan 14 19:30:26 UTC 2022
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Structures and Materials
dc.subject.keywords Elastoplasticity
dc.subject.keywords Strain-induced phase transformation
dc.subject.keywords High pressure
dc.subject.keywords Plastic shear
dc.subject.keywords Rotational Diamond anvil cell
dc.subject.keywords Large deformation
dc.title FEM modeling of plastic flow and strain-induced phase transformation in BN under high pressure and large shear in a rotational diamond anvil cell
dc.type article
dc.type.genre article
dspace.entity.type Publication
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