Contribution of Photoelasticity Measurements to the Evaluation of Operating Safety of Nuclear Facilities. Photoelastic Determination of Stress Intensity Coefficient

摘要

A new method was developed for accurate determination of the coefficient of stress intensity using photoelastic measurement. A sheet with a crack was subjected to a tensile stress of 66.2 N. Measurements were made in the whole thickness of the sheet before cutting and then on the cut-outs located perpendicularly to the axis of the crack. A detailed analysis was made using isochromatic lines on the root of the crack. The values of maximum shear stress measured along the y axis served as the basis for calculating the coefficient of stress intensity. A comparison with the theoretical solution showed that the proposed method using shear stress is simple and accurate. (Atomindex citation 16:058388)