Memorias de investigación
Artículos en revistas:
An inverse optimization strategy to determine single crystal mechanical behavior from polycrystal tests: Application to AZ31 Mg alloy
Año:2014
Áreas de investigación
  • Ingeniería civil y arquitectura
Datos
Descripción
An inverse optimization strategy was developed to determine the single crystal properties from experimental results of the mechanical behavior of polycrystals. The polycrystal behavior was obtained by means of the finite element simulation of a representative volume element of the microstructure in which the dominant slip and twinning systems were included in the constitutive equation of each grain. The inverse problem was solved by means of the Levenberg?Marquardt method, which provided an excellent fit to the experimental results. The iterative optimization process followed a hierarchical scheme in which simple representative volume elements were initially used, followed by more realistic ones to reach the final optimum solution, leading to important reductions in computer time. The new strategy was applied to identify the initial and saturation critical resolved shear stresses and the hardening modulus of the active slip systems and extension twinning in a textured AZ31 Mg alloy. The results were in general agreement with the data in the literature but also showed some differences. They were partially explained because of the higher accuracy of the new optimization strategy but it was also shown that the number of independent experimental stress?strain curves used as input is critical to reach an accurate solution to the inverse optimization problem. It was concluded that at least three independent stress?strain curves are necessary to determine the single crystal behavior from polycrystal tests in the case of highly textured Mg alloys.
Internacional
Si
JCR del ISI
Si
Título de la revista
International Journal of Plasticity
ISSN
0749-6419
Factor de impacto JCR
4,356
Información de impacto
Datos JCR del año 2012
Volumen
57
DOI
http://dx.doi.org/10.1016/j.ijplas.2014.02.001
Número de revista
0
Desde la página
1
Hasta la página
15
Mes
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Participantes
  • Autor: Vicente Herrera Solaz UPM
  • Autor: Fco. Javier Llorca Martinez UPM
  • Autor: Ebubekir Dogan Department of Materials Science and Engineering, Texas A
  • Autor: Ibrahim Karaman Department of Materials Science and Engineering, Texas A
  • Autor: Javier Segurado Escudero 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 Materiales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)