Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
An inverse optimization strategy to determine single crystal mechanical behavior from polycrystal tests: Application to AZ31 Mg alloy
Year:2014
Research Areas
  • Civil engineering and architecture
Information
Abstract
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.
International
Si
JCR
Si
Title
International Journal of Plasticity
ISBN
0749-6419
Impact factor JCR
4,356
Impact info
Datos JCR del año 2012
Volume
57
http://dx.doi.org/10.1016/j.ijplas.2014.02.001
Journal number
0
From page
1
To page
15
Month
FEBRERO
Ranking
Participants
  • 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)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Departamento: Ciencia de Materiales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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