Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Virtual Fracture Testing of Fiber-reinforced Composites: A Computational Micromechanics Approach
Year:2007
Research Areas
  • Materials
Information
Abstract
The use of multiscale finite clement simulations to perform virtual fracture tests of composite materials is demonstrated. The fracture behavior of a fiber-reinforced composite beam in presence of a notch perpendicular to the fibers was modeled using an embedded cell approach in three dimensions. The representation of the material in front of the notch tip-where damage was going to be concentrated-included the actual fiber-matrix topology, while the remainder of the beam was modeled as a linear thermo-elastic, transversally-isotropie homogeneous solid. The damage and fracture micromechanisms which controlled the onset of fracture (namely, plastic deformation of the matrix, brittle fiber fracture and fiber/matrix frictional sliding) were included in the behavior of the different phases and interfaces, and the corresponding micromechanical parameters governing their behavior were independently measured. Virtual fracture tests were carried out at 25 degrees C, 200 degrees C and 400 degrees C to determine the maximum load carried by the notched beams, and the apparent fracture toughness of the composite beams was computed from the maximum load and the initial notch length in the simulations. The predictions of the evolution of the fracture toughness with temperature were in good agreement with the experimental data without the need of adjustable or "tuning" parameters, which shows the potential of this approach to carry out "virtual" tests to predict the fracture behavior of novel microstructures and materials. (c) 2006 Elsevier Ltd. All rights reserved.
International
Si
JCR
Si
Title
ENG FRACT MECH
ISBN
0013-7944
Impact factor JCR
1,227
Impact info
Volume
74
Journal number
7
From page
1126
To page
1138
Month
MAYO
Ranking
Participants
  • Autor: Fco. Javier Llorca Martinez (UPM)
  • Autor: Carlos Daniel Gonzalez Martinez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales avanzados y nanomateriales
  • Departamento: Ciencia de los Materiales
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