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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Algorithm Development in Materials Science and Engineering
Presentation Title Robust and Accurate Self-consistent Homogenization of Elasto-viscoplastic Polycrystals
Author(s) Miroslav Zecevic, Ricardo Lebensohn
On-Site Speaker (Planned) Miroslav Zecevic
Abstract Scope Robust and accurate homogenization schemes for elastic and rigid-viscoplastic polycrystals have been developed over the past several decades. However, homogenization in the elasto-viscoplastic (EVP) regime is a harder problem due to the interplay between elastic and plastic deformation, and has received considerably less attention. We have developed and compared three new self-consistent (SC) schemes for EVP polycrystals, based on two different solutions to Eshelby’s EVP inhomogeneity problem, which is at the basis of SC schemes. In addition, we have also investigated the feasibility of calculating intragranular stress fluctuations in the context of the new EVPSC formulations. Predictions were compared with each other, with experiments, and with full-field predictions. The elastic and viscoplastic limits were respected, and acceptable agreement was in general observed in the most challenging elastoplastic transition. Benefits and drawbacks of the proposed models are discussed, and main difficulties involved in the SC homogenization of EVP polycrystals are outlined.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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