Study of Stress Intensity Factor for Double Column of Dissimilar material under Torsion Load

摘要

Industrial products are guaranteed for high performance, and are composed of dissimilar material is composted into new material or made into new materials again the compounding of material and the advancement of the joint technology. The stress intensity factors K{sub}I, K{sub}(II) and K{sub}(III) usually act in single or mixed modes. The separation of K{sub}I and K{sub}(II) has already been achieved. In this paper, an experimental technique for determining the stress intensity factor if has been presented using the method of reflected caustics in combination with the photoelastic stress freezing method. The experimental model is a cylindrical bar with w radial crack along the direction of the axis under the load of pure torsion. In order to obtain a caustic pattern, a slice cut from the frozen model is annealed and evaluated for the stress intensity factor in a double column of the different kind material using experiment analysis.