A Study of the effect of various parameters on the stress analysis of isotropic and anisotropic plates containing a central rectangular hole subjected to shear stress

Structural failure as a result of stress concentration at the geometric discontinuities is one of the concerns of desigrs. To avoid the fatigue failure of structures، several models have been proposed in recent years to predict the fatigue life. Stress concentration factor، especially in the presence of cracks with sharp edge، is a key parameter in displaying these models. perforated composite plates can be seen in many engineering structures. Due to the complexity and breadth of engineering structures، detailed investigation of these structures seems to be needed. In this paper، try to study the effect of various parameters on the stress analysis of composite plates containing a central rectangulare cutout that are subjected to shear stress by analytical method. These parameters are: cutout bluntness، cutout orientation، fiber angle، cutout elongation and material properties. In this paper، The effect of these parameters and the optimal values of the parameters which leads to less stress concentration will be introduced. The finite element method has been used to check the accuracy of analytical results. The analytical results are in good agreement with the numerical results. The results indicated، The cutout geometry and fibr angle in composite plates can be a significant influence on the stress distribution around cutout