Abstract
This paper investigates the effect of the location of testing area in residual stress measurement by Moiré interferometry combined with hole-drilling method. The selection of the location of the testing area is analyzed from theory and experiment. In the theoretical study, the factors which affect the surface released radial strain ɛ r were analyzed on the basis of the formulae of the hole-drilling method, and the relations between those factors and ɛ r were established. By combining Moiré interferometry with the hole-drilling method, the residual stress of interference-fit specimen was measured to verify the theoretical analysis. According to the analysis results, the testing area for minimizing the error of strain measurement is determined. Moreover, if the orientation of the maximum principal stress is known, the value of strain will be measured with higher precision by the Moiré interferometry method.
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Qin, L., Xie, H., Zhu, R. et al. Study of the location of testing area in residual stress measurement by Moiré interferometry combined with hole-drilling method. Sci. China Phys. Mech. Astron. 57, 708–715 (2014). https://doi.org/10.1007/s11433-013-5256-5
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DOI: https://doi.org/10.1007/s11433-013-5256-5