13th International Conference on Fracture June 16–21, 2013, Beijing, China -6- Q is defined by, ܳ ൌ ൝1 1.464ሺܽ ോܿ ሻଵ.ହ if ሺ ୟ ୡ ሻ1 11⋅464ሺܿ ോܽ ሻ ଵ.ହ ifሺ ୟ ୡ ሻ1 (Eq. 16) The schematic of the crack front can be seen at Figure 2. The validation of the model is done by modeling and analyzing the plate, which contains a semi-elliptic inclined surface crack, with finite dimensions subjected to uniform tension (figures 3 and 4). As it can be seen from these figures, the results of this study are plotted for ߙ ൌ0 ܽ݊݀ ߙ ൌ30. it can be said that the obtained results are in good agreement with that of Ayhan et al. [11] Fig 2- semi-elliptic inclined surface crack in a plate under uniform tensile remote stresses Fig 3- Comparisons of normalized mixed mode stress intensity factors for 0୭ inclination angle Fig 4- Comparisons of normalized mixed mode stress intensity factors for 30୭ inclination angle
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