Mathematical Model of the Experimental Drilled Hole Imperfections Influence on the Stress State Identification for the "Hole Drilling Strain-Gauge Method" Application

Abstract:

The hole drilling method used for the stress state identification is currently standardized by the E 837 international standard. It is based on relaxation of the residual stress in vicinity of the drilled hole. Relaxation of the residual stress relieves deformations which are measured with strain gage rosette. However, using the theory E 837 does not correct the influence of the experimental hole imperfections (eccentricity, roundness, perpendicularity) on this experimental method accuracy. This article analyzes the extent of errors that affect these imperfections.

• Periodical: Applied Mechanics and Materials (Volume 486)
• Pages: 16-19
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.486.16
• Online since: December 2013
• Authors: Karel Vitek*
• Keywords: Hole Drilling Strain Gage Method, Identification, Residual Stress, Stress

References

[1] ASTM International, Standard Test Method for Determining Residual Stresses by the Hole-Drilling Strain Gage Method. Designation: E 837-01. USA, updated in January 2002, pp.1-10.

DOI: 10.1520/e0837-01e01

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[5] Havlík, V.: Verify the effect of eccentricity of the experimental hole for hole-drilling method to identify state of stress, CTU in Prague, (2012).

[6] Ješina, Z.: Verification of the effect of deviation of the hole perpendicularity within the hole drilling strain gage method, diploma thesis, CTU in Prague, (2013).

[7] Vítek, K.: Stress State Identification By Numerical Simulation of the Hole Drilling Principle – Part A and B, Proceedings of 46th International Scientific Conference Experimental Stress Analysis 2008. (TU Ostrava and Czech Society for Mechanics, Ostrava, 2008), p.271.

[8] Vítek, K., Havlík, V. : Verification of the eccentric hole influence on accuracy of the residual stress determination by Hole-drilling strain gage method, 50th annual konference on experimental analysis - EAN 2012, ČSM and CTU in Prague, Tábor, 4. 6. - 7. 6 2012, ISBN: 978-80-01-05060-6, pp.525-532.

[9] Vítek, K., Regression Model of the Hole Drilling Principle for the Stress State Identification, Proceedings of 49th International Scientific Conference Experimental Stress Analysis 2011. (Brno University of Technology and Czech Society for Mechanics, Brno, 2011), p.423 – 428, ISBN 978-80-214-4275-7, (2011).

[10] Vítek, K.: Coefficient Functions of Hole-Drilling Method, 50th annual konference on experimental analysis - EAN 2012, ČSM and CTU in Prague, Tábor, 4. 6. - 7. 6 2012, ISBN: 978-80-01-05060-6, pp.515-524.