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A Methodology to Evaluate Continuum-Scale Yield Surfaces Based on the Spatial Distributions of Yielding at the Crystal Scale

  • Andrew C. Poshadel
  • Paul R. DawsonEmail author
Article
  • 4 Downloads

Abstract

Using a correlation between local yielding and a multiaxial strength-to-stiffness parameter, the continuum-scale yield surface for a polyphase, polycrystalline solid is predicted. The predicted surface explicitly accounts for microstructure through the quantification of strength-to-stiffness based on a finite element model of a crystal-scale sample. The multiaxial strength-to-stiffness is evaluated from the elastic response of the sample and the restricted slip, single crystal yield surface. Macroscopic yielding is defined by the propagation of a yield band through the sample and is detected with the aid of a flood-fill algorithm. The methodology is demonstrated with the evaluation of a plane-stress yield surface for a dual-phase super-austenitic stainless steel.

Notes

Acknowledgment

Support was provided by the US Office of Naval Research (ONR) under contract N00014-09-1-0447.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2019

Authors and Affiliations

  1. 1.Sibley School of Mechanical and Aerospace EngineeringCornell UniversityIthacaUSA

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