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Memorias de investigación
Artículos en revistas:
Micromechanics of Particle-reinforced Elasto-viscoplastic Composites: Finite Element Simulations Versus affine Homogenization
Año:2007
Áreas de investigación
  • Materiales
Datos
Descripción
The micromechanics of elasto-viscoplastic composites made up of a random and homogeneous dispersion of spherical inclusions in a continuous matrix was studied with two methods. The first one is an affine homogenization approach, which transforms the local constitutive laws into fictitious linear thermo-elastic relations in the Laplace-Carson domain so that corresponding homogenization schemes can apply, and the temporal response is computed after a numerical inversion of Laplace transform. The second method is the direct numerical simulation by finite elements of a three-dimensional representative volume element of the composite microstructure. The numerical simulations carried out over different realizations of the composite microstructure showed very little scatter and thus provided -for the first time- "exact" results in the elasto-viscoplastic regime that can be used as benchmarks to check the accuracy of other models. Overall, the predictions of the affine homogenization model were excellent, regardless of the volume fraction of spheres, of the loading paths (shear, uniaxial tension and biaxial tension as well as monotonic and cyclic deformation), particularly at low strain rates. It was found, however, that the accuracy decreased systematically as the strain rate increased. The detailed information of the stress and strain microfields given by the finite element simulations was used to analyze the source of this difference, so that better homogenization methods can be developed.
Internacional
Si
JCR del ISI
Si
Título de la revista
INT J PLASTICITY
ISSN
0749-6419
Factor de impacto JCR
4,516
Información de impacto
Volumen
23
DOI
Número de revista
6
Desde la página
1041
Hasta la página
1060
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: O Pierard
  • Autor: Javier Segurado Escudero (UPM)
  • Autor: I Doghri
  • Autor: Fco. Javier Llorca Martinez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Materiales Estructurales avanzados y nanomateriales
  • Departamento: Ciencia de los Materiales
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