Stresses in Pin-Loaded Orthotropic Plates: Photoelastic Results

Abstract

The stresses in transparent glass-epoxy plates loaded by a steel pin through a hole were determined experimentally using photoelasticity. The paper presents the stresses around the hole edge, across the net section, along the shear-out line, and on the centerline below the hole for quasi-isotropic, unidirectional, and angle-ply plates. Stresses in an isotropic comparison specimen are also presented. Stress concentration factors for several locations around the plates are tabulated. The paper discusses the experimental approach and the isochromatic and isoclinic fringe patterns for the four plates are shown.