224 An Experimental Study on Stress Separation by Hybrid Measurement Using Thermoelasticity and Photoelasticity
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This paper describes an experimental method of stress separation. Thermoelastic stress analysis (TSA) and photoelastic stress analysis (PSA) have been developed as full-field visualization methods of stress distribution. Only the sum of principal stresses can be measured by TSA, while only the difference of principal stresses can be measured by PSA. So it is difficult to separate them into individual stress components by either of the methods. In this study, a hybrid measurement technique using both of these methods was proposed for stress separation. Stress separation of a loaded plate with a circular hole was investigated. The experimental results were compared with results of boundary element method analysis. It was found that the stress components experimentally obtained by the proposed technique coincided with those obtained by the boundary element analysis. Feasibility of the proposed hybrid measurement for stress separation is demonstrated.
