Photoelastic Stress Analysis of the Spline Shaft

Abstract

This paper presents an experimental investigation about the spline shaft by the threedimensional photoelastic method. The results are as follows : (1) The stress distribution of the spline shaft was measured by Dr. Nisida's wedge method, and the stress concentration factor was obtained. The results were coincident fairly well with those of other methods. (2) The accuracy of the wedge method was checked and its value was about 5%. (3) The stress distribution of the meshing spline shaft was investigated, and it was shown that the maximum bending stress of the tooth was comparable with the maximum torsional stress.