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This paper describes a fundamental study on the possibility of a new type of the X-ray stress measurement, in which stresses are obtained from analyzing whole part of one diffraction ring detected with a two-dimensional X-ray detector called image plate (IP). The theory of the stress determination proposed by Taira and Tanaka (1978) was shown first, and then newly modified to be able to determine all plane stress components from a single-exposure experiment. An experiment was performed for the examination of the method, and the result of showed good agreement with stresses that were applied to the specimen mechanically.

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