X-Ray Stress Measurement of Three Stress Components of Plane Stress State by the Dual-Axis Inclining Method
Taizo OGURI and Kazuo MURATA
Abstract:An X-ray stress measurement technique applicable to a confined area - dual-axis inclining method - has been developed to measure three stress components of an plane stress state. The present method is composed of the iso-inclination scanning (angle:} ) and the side-inclination scanning (angle: ). The }scanning under the condition of 0 results in the - splitting even if the measured area is in the plane stress state. The amount of the - splitting depends on the value of and the shear stress component. The average of the diffraction angles in the - splitting is proportional to sin2. The proportional constant indicates not a true normal stress but an apparent normal stress because of the condition of 0 . The apparent normal stress is proportional to sin2. Its gradient and y-intercept depend on the two orthogonal normal stress components respectively. The difference of the diffraction angles in the - splitting is proportional to sinsin|2| . Its gradient is proportional to the shear stress component. The validity of the present method was verified by applying the present method and the conventional method to a flat specimen respectively, and by comparing the values measured. Key Words:Groove, Confined area, Residual stress, Dual-axis inclining method, X-ray stress measurement, Non-destructive inspection