Strain Energy Density Prediction of Mixed-Mode Crack Propagation in Functionally Graded Materials

  • Nabil Benamara University of Sidi Bel-Abbes, ALGERIA
  • Abdelkader Boulenouar University of Sidi Bel-Abbes, ALGERIA
  • Miloud Aminallah University of Sidi Bel-Abbes, ALGERIA

Abstract

The objective of this work is to present a numerical modeling of crack propagation path in functionally graded materials (FGMs) under mixed-mode loadings. The minimum strain energy density criterion (MSED) and the displacement extrapolation technique (DET) are investigated in the context of fracture and crack growth in FGMs. Using the Ansys Parametric Design Language (APDL), the direction angle is  evaluated as a function of stress intensity factors (SIFs) at each increment of propagation and the variation continues of the material properties are incorporated by specifying the material parameters at the centroid of each finite element (FE). In this paper, several applications are investigated to check for the robustness of the numerical techniques. The defaults effect (inclusions and cavities) on the crack propagation path in FGMs are examined.
Keywords: Functionally graded materials, Strain energy density, Mixedmode, Displacement extrapolation, Stress intensity factor
Published online
2016-12-12
How to Cite
Benamara, N., Boulenouar, A. and Aminallah, M. (2017) “Strain Energy Density Prediction of Mixed-Mode Crack Propagation in Functionally Graded Materials”, Periodica Polytechnica Mechanical Engineering, 61(1), pp. 60-67. https://doi.org/10.3311/PPme.9682.
Section
Articles