Photoelastic Investigation in Connection with the Fatigue Strength of Bolted Joints

Abstract

Summary The elastic stress distribution around a circular hole in a flat bar under simple tension, when the hole is filled by a push-fit pin, was investigated photoelastically. Over a range of values of the ratio of hole diameter to width of bar, and for pins of differing Young's moduli, the effect of the pin was sensibly the same, namely, to reduce the maximum tension on the hole boundary by about 15 per cent, as compared with that in the unfilled hole. The maximum shear stress on the boundary was unaltered.