On the mixed-mode crack propagation in FGMs plates: comparison of different criteria
| Autor: | Benamara Nabil, Benseddiq Noureddine, Aminallah Miloud, Boulenouar Abdelkader |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Extrapolation Strain energy density function Fracture mechanics 02 engineering and technology Building and Construction Structural engineering 021001 nanoscience & nanotechnology Displacement (vector) Finite element method Parametric design 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials 0210 nano-technology Material properties business Stress intensity factor Civil and Structural Engineering |
| Zdroj: | Structural Engineering and Mechanics. 61:371-379 |
| ISSN: | 1225-4568 |
| Popis: | Modelling of a crack propagating through a finite element mesh under mixed mode conditions is of prime importance in fracture mechanics. In this paper, two crack growth criteria and the respective crack paths prediction in functionally graded materials (FGM) are compared. The maximum tangential stress criterion (et -criterion) and the minimum strain energy density criterion (S-criterion) are investigated using advanced finite element technique. Using Ansys Parametric Design Language (APDL), the variation continues in the material properties are incorporated into the model by specifying the material parameters at the centroid of each finite element. In this paper, the displacement extrapolation technique (DET) proposed for homogeneous materials is modified and investigated, to obtain the stress intensity factors (SIFs) at crack-tip in FGMs. Several examples are modeled to evaluate the accuracy and effectiveness of the combined procedure. The effect of the defects on the crack propagation in FGMs was highlighted. |
| Databáze: | OpenAIRE |
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