The Stress State of Corner Cutout Area of the Model Boundary by Photoelastic Method

Abstract

AbstractThe stress–strain state in the zone of the corner cutout of the area boundary is characterized by the singularity of the solution of the homogeneous boundary value problem and the complexity of its analysis. This article focuses on the stress state (SS) in the neighborhood of an irregular point of the area boundary on flat composite models with different cutout angles of the polymer material end. Forced deformations are created in one of the areas of the model, the forced deformations gap along the area contact boundary extends to the top of the corner cutout on the boundary of the model. The solution is obtained by means of experiments on optically sensitive material models by photoelastic method using the free temperature deformation defrosting property. A comparison of the SS obtained experimentally on the model and the parent distribution of SS in the zone adjacent to the irregular point of the area boundary is given. A conclusion is made on coincidence of the positions of the pure shear line obtained experimentally on the model and the neutral axis for the corresponding wedge under the action of a concentrated load. This paper is aimed at analyzing SS in the zone of the corner cutout of the boundary of the region and identifying the self-balanced SS corresponding to the solution of the homogeneous boundary value problem in the area with an irregular boundary point.KeywordsStress stateCorner cutout of the area boundaryPhotoelastic methodSingularity of the solution