Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Micromechanics of Elasto-plastic Materials Reinforced with Ellipsoidal Inclusions.
Year:2007
Research Areas
  • Materials
Information
Abstract
The effective mechanical behavior of an elasto-plastic matrix reinforced with a random and homogeneous distribution of aligned elastic ellipsoids was obtained by the finite element simulation of a representative volume element (RVE) of the microstructure and by homogenization methods. In the latter, the composite behavior was modeled by linearization of the local behavior through the use of the tangent or secant stiffness tensors of the phases. "Quasi-exact" results for the tensile deformation were attained by averaging of the stress-strain curves coming from the numerical simulation of RVEs containing a few dozens of ellipsoids. These results were used as benchmarks to assess the accuracy of the homogenization models. The best approximations to the reference numerical results were provided by the incremental and the second-order secant methods, while the classical or first-order secant approach overestimated the composite flow stress, particularly when the composite was deformed in the longitudinal direction. The discrepancies among the homogenization models and the numerical results were assessed from the analysis of the stress and strain microfields provided by the numerical simulations, which demonstrated the dominant effect of the localization of the plastic strain in the matrix on the accuracy of the homogenization models. (C) 2007 Elsevier Ltd. All rights reserved.
International
Si
JCR
Si
Title
INT J SOLIDS STRUCT
ISBN
0020-7683
Impact factor JCR
1,569
Impact info
Volume
44
Journal number
21
From page
6945
To page
6962
Month
OCTUBRE
Ranking
Participants
  • Autor: O. Pierard
  • Autor: Carlos Daniel Gonzalez Martinez (UPM)
  • Autor: Fco. Javier Llorca Martinez (UPM)
  • Autor: I. Doghri
  • Autor: Javier Segurado Escudero (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales avanzados y nanomateriales
  • Departamento: Ciencia de los Materiales
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)