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Mechanical Properties of Fine-Grained Structures Using Computational Cell Elements

[+] Author Affiliations
Y. H. Park, V. Arige

New Mexico State University, Las Cruces, NM

J. Tang

University of Iowa, Iowa City, IA

Paper No. PVP2006-ICPVT-11-93581, pp. 469-475; 7 pages
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 2: Computer Technology
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4753-5 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by ASME


Mechanical properties of fine-grained microstructure are predicted using a phase mixture model. The constitutive model is implemented into commercial finite element analysis code ABAQUS as a UMAT subroutine. A unified constitutive model based on dislocation density evolution describes the matrix phase behavior. The yield criterion of the Gurson-Tvergaard-Needleman material model for porous materials is applied to the boundary phase. The boundary phase is assumed to behave like a quasi-amorphous material. The effect of the grain size on the material property is studied using a numerical example.

Copyright © 2006 by ASME



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