Practice of Measuring Formulas of Three Dimensional Stress by X-ray and the Problem of the Errors

Abstract

There are occasions when we wish to require the three dimensional stress from as few films as possible in order to cut down the hours for the measurement by X-ray. According to the theory, all elements of the stress are obtained from three films, and a special elements of the stress are obtained from one or two films. In these cases, formulas which the authors introduced before can not be employed, and consequently, they introduced new formulas for this requirement in this paper. At the same time, problems of errors of the measurment are treated numerically.