25 August 2009 Numerical analysis of drilling hole work-hardening effects in hole-drilling residual stress measurement
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Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73754D (2009) https://doi.org/10.1117/12.839303
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China
Abstract
The hole-drilling strain gage method is an effective semi-destructive technique for determining residual stresses in the component. As a mechanical technique, a work-hardening layer will be formed on the surface of the hole after drilling, and affect the strain relaxation. By increasing Young's modulus of the material near the hole, the work-hardening layer is simplified as a heterogeneous annulus. As an example, two finite rectangular plates submitted to different initial stresses are treated, and the relieved strains are measured by finite element simulation. The accuracy of the measurement is estimated by comparing the simulated residual stresses with the given initial ones. The results are shown for various hardness of work-hardening layer. The influence of the relative position of the gages compared with the thickness of the work-hardening layer, and the effect of the ratio of hole diameter to work-hardening layer thickness are analyzed as well.
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H. Li, H. Li, Y. H. Liu, Y. H. Liu, "Numerical analysis of drilling hole work-hardening effects in hole-drilling residual stress measurement", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73754D (25 August 2009); doi: 10.1117/12.839303; https://doi.org/10.1117/12.839303
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