Abstract
This paper presents numerical study on the stress intensity factors (SIF) for slanted surface crack subjected to mode I loading. Tremendous amount of works can be found in discussing the normal crack under various types of loadings. According to literature survey, there is no significant information on the SIFs for slanted cracks available. Therefore, the purpose of this paper is to develop the slanted numerical crack model using ANSYS finite element program and to analyze the behavior of various type of geometries of slanted cracks. Since no SIFs for slanted cracks are available, then the present model is compared with the previous normal crack for the validation purposes. It is found that the present model is well agreed with the existing model. Several important parameters are used; crack aspect ratio, a/b, relative crack depth, a/D and slanted angle, . It is realized that such parameters played important roles in determining the SIFs where if a/b and a/D are increased, the SIFs are also increased. When the slanted angles are introduced, the SIFs decreased when compared with the normal cracks. Instead of mode I SIF, mode II are also induced and therefore affecting the structural reliability. However, mode II SIF is relatively insignificant compared with mode I SIF
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