エリアディテクタ方式のX線三軸応力測定法の改良に関する研究  [in Japanese] A Study on Improvements in Multiaxial Stress Analysis with Area Detector Type Diffraction Method  [in Japanese]

Three methods of an area detector type multiaxial stress measurement were studied in this paper. The first method, which was proposed by Sasaki and Hirose, gives us correct results when precise diffraction data are obtained and are used in the stress calculation. The error of the stress determination sometimes occurs in this method when the diffraction data contains the error of measurement. In order to avoid such an error, the second method was developed in this study by improving the first method. The second method was also found to be correct in this paper and to be effective within practical use. The third method was also proposed to decrease the number of diffraction data needed in the stress calculation. The evaluation on the accuracy and the comparison of these three methods were carried out by conducting a numerical simulation and an experiment. It was found that the two methods proposed in this paper can contribute to make progress in the reliability of the multiaxial stress evaluation by the area detector type X-ray method.