13th International Conference on Fracture June 16–21, 2013, Beijing, China -8- Fig 8- Distribution of normalized mode III stress intensity factors around crack front Fig 9- Distribution of normalized energy release rates around crack front Figures 10 shows the distribution of temperature around the crack front at the time maximum values of normalized SIFs and energy release rates are reached. Fig 10- Distribution of temperature around crack front In this study, an inclined semi-elliptical surface crack in an FGM structure is modeled in three dimension and fracture analyses are carried out by implementing finite element technique. For the model generations and finite element analyses, the multi-purpose finite element code ANSYS is used. The behavior of three dimensional inclined semi-elliptical surface cracks is examined under transient thermal loading for different ratios of material gradient. The mixed mode stress intensity factors and energy release rates around the crack front are calculated by utilizing displacement correlation technique.In order to verify the model and technique utilized in FGM structure, first of all, a plate and a semi-infinite solid with homogeneous material properties are modeled and analyzed under uniform tension. Then, the results obtained are compared to those given by Ayhan et al. [1 1]. It is observed that the figures generated for comparisons are in good agreement and therefore, it is concluded that this model can also be used for the finite element
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