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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/5417
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dc.contributor.authorKar G.-
dc.contributor.authorRoy Chowdhury, Shubhankar-
dc.contributor.authorRoy D.-
dc.date.accessioned2020-10-06T14:54:48Z-
dc.date.available2020-10-06T14:54:48Z-
dc.date.issued2020-
dc.identifier.citationMechanics of Advanced Materials and Structures(2020), 27(13): 1110-1119-
dc.identifier.issn15376494-
dc.identifier.urihttps://doi.org/10.1080/15376494.2020.1717692-
dc.identifier.urihttp://repository.iitr.ac.in/handle/123456789/5417-
dc.description.abstractWe present a physically enhanced ductile damage model applicable for body centered cubic (BCC) metals. The current proposition extends the authors’ recent work on thermo-viscoplasticity based on two-temperature thermodynamics and physics of disparate types of dislocation densities. The description of the thermodynamic system involves primarily two types of variables (or degrees of freedom, DOFs) representing several micro/meso-scopic processes occurring in two separable time-scales during ductile damage. Processes of rearrangement and movement of defects, namely dislocations, voids, micro-cracks, take place in a time scale much slower than that of the vibration of atoms about their equilibrium positions in the lattice. Consequently, they appear in the thermodynamic theory in terms of slow configurational DOFs and the fast kinetic vibrational DOFs respectively. While we consider physics based internal variables, e.g., mobile and forest dislocation densities, for modeling viscoplasticity alone, material degradation due to ductile damage is treated in a phenomenological fashion taking recourse to the framework of continuum damage mechanics. In order to assess the performance of our proposal, numerical experiments on boundary value problems of viscoplasticity with or without damage are carried out and validated against available experimental evidence. © 2020, © 2020 Taylor & Francis Group, LLC.-
dc.language.isoen_US-
dc.publisherTaylor and Francis Inc.-
dc.relation.ispartofMechanics of Advanced Materials and Structures-
dc.subjectductile damage-
dc.subjectkinetic-vibrational and configurational subsystems-
dc.subjectmobile and forest dislocations-
dc.subjectTwo-temperature thermodynamics-
dc.titleA nonequilibrium thermodynamic model for viscoplasticity coupled with damage for BCC metals-
dc.typeArticle-
dc.scopusid57191668222-
dc.scopusid56818427600-
dc.scopusid7402439420-
dc.affiliationKar, G., Computational Mechanics Lab, Department of Civil Engineering, Indian Institute of Science, Bangalore, India, Centre of Excellence in Advanced Mechanics of Materials, Indian Institute of Science, Bangalore, India-
dc.affiliationRoy Chowdhury, S., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, India-
dc.affiliationRoy, D., Computational Mechanics Lab, Department of Civil Engineering, Indian Institute of Science, Bangalore, India, Centre of Excellence in Advanced Mechanics of Materials, Indian Institute of Science, Bangalore, India-
dc.description.fundingThis work was supported by Defense Research and Development Organization, Government of India under Grant No. DRDO/0642.-
dc.description.correspondingauthorRoy, D.; Computational Mechanics Lab, Department of Civil Engineering, Indian Institute of ScienceIndia; email: royd@iisc.ac.in-
Appears in Collections:Journal Publications [CE]

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