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Study and validation of a variational theory of thermo-mechanical coupling in finite visco-plasticity

Stainier, L. and Ortiz, M. (2010) Study and validation of a variational theory of thermo-mechanical coupling in finite visco-plasticity. International Journal of Solids and Structures, 47 (5). pp. 705-715. ISSN 0020-7683.

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We present an experimental validation of the variational theory of thermo-mechanical coupling of Yang et al. (2006) in the case of finite thermo-visco-plasticity. The variational theory results in precise predictions of the rate of heating due to dissipation and does not require an a priori definition or model of a fraction of plastic work converted to heat. We show that the predicted heat-to-plastic work ratios are in good agreement with experimental observations for 2024-T3 aluminum, α-titanium and pure polycrystalline tantalum, including their evolution with strain and their dependence on strain-rate. We also critically compare the variational theory to other theories and models in the literature.

Item Type:Article
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URLURL TypeDescription
Stainier, L.0000-0001-6719-6616
Ortiz, M.0000-0001-5877-4824
Additional Information:© 2009 Elsevier Ltd. Received 6 October 2008; revised 16 November 2009. Available online 24 November 2009. The authors gratefully acknowledge the support of the Department of Energy through Caltech’s ASCI/ASAP Center for Simulating the Dynamic Response of Materials. L.S. is a Research Associate at the Fonds de la Recherche Scientifique – FNRS.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Fonds de la Recherche Scientifique (FNRS)UNSPECIFIED
Subject Keywords:Finite visco-plasticity; Thermo-mechanical coupling; Variational constitutive updates
Issue or Number:5
Record Number:CaltechAUTHORS:20100225-094200302
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17590
Deposited By: Jason Perez
Deposited On:25 Feb 2010 20:49
Last Modified:23 Nov 2020 20:32

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