Three Dimensional Photoelastic Investigation for Analyzing Stress Concentration Factor in Isotropic Square Simply Supported Plate with Hole Subjected to Transverse Loading

Abstract

In this paper, an experimental and numerical study was carried out to examine stress concentration fields near singularities, originating and propagating in accordance with different hole diameter to width ratios (D/A) in a square plate. Experimental three-dimensional photoelastic analyses were performed to predict the reaction of geometric conditions, loading and boundary condition on stress concentration factor (SCF) near the hole. During, experimental analysis, stress was locked inside the plate by the use of stress freezing technique. Further evaluation of locked stress was performed with a polariscope, with the help of slices procured using the slicing method employed on stress frozen plate. The different fringes obtained from monochromatic and white light showed the variation of maximum intensity stresses which were further compared with the stress contours from the finite element model. Also, assessment was conducted with the finite element method to validate the results. Based on the results, percentage variation between experimental and analytical was evaluated and it was found that the variation was between 2 and 5 %.

Effect of various discontinuities present in a plate on stress concentration: a review

“…C. A. Penaloza et al have utilized FEA for found stresses generated in orthotropic plates having circular holes under bending, which shows stress concentration was increasing as the spacing of holes decreased [73]. Under the transverse loading, the effect of the circular hole on stress concentration factor in isotropic square simply supported plate was obtained by M. Banerjee et al They have used three dimensional photo elastic methods and FEA method which shows variation between −2.66% to 4.44% [74]. Effect of stress concentration near dies, holes, and cracks in the half plane was discussed by O. Maksymovych et al using integral equations on the basis of Green-type solutions.…”