Abstract
Hole-drilling measurements of residual stresses are traditionally made on materials that are either very thick or very thin compared with the hole diameter. The calibration constants needed to evaluate the local residual stresses from the measured strain data are well established for these two extreme cases. However, the calibration constants for a material with finite thickness between the extremes cannot be determined by simple interpolations because of the occurrence of local bending effects not present at either extreme. An analytical model is presented of the bending around a drilled hole in a finite thickness material and a practical procedure is proposed to evaluate the corresponding hole-drilling calibration constants.
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Acknowledgments
The authors sincerely thank the Natural Sciences and Engineering Research Council of Canada (NSERC), American Stress Technologies, Pittsburgh, PA, and the Institute for Computing, Information and Cognitive Systems (ICICS) at UBC for financially supporting this research. They also gratefully thank Prof. R.L. Taylor for his kind support with the finite element analysis.
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Schajer, G.S., Abraham, C. Residual Stress Measurements in Finite-Thickness Materials by Hole-Drilling. Exp Mech 54, 1515–1522 (2014). https://doi.org/10.1007/s11340-014-9935-6
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DOI: https://doi.org/10.1007/s11340-014-9935-6