About the Author of H-DRILL


Prof. Gary Schajer Professor Gary S. Schajer, the author of H-Drill, is a well-known researcher in the area of residual stress measurements. He teaches and does research in the Department of Mechanical Engineering, at the University of British Columbia, Vancouver, Canada. His first hole-drilling publication was recognized by the 1981 Best Paper Award of the Journal of Engineering Materials and Technology. Since then, Professor Schajer has done extensive research on residual stress measurements, and has published numerous papers and book chapters. He is a member of ASTM committee E28-13 on residual stress measurement and has been responsible for three major revisions of ASTM E837 Standard Test Method for Hole-Drilling Residual Stress Measurements. He also edited the recent reference book Practical Residual Stress Measurement Methods, published by Wiley. In 2013, his work was recognized by the B.J. Lazan Award of the Society for Experimental Mechanics.

Hole-Drilling Residual Stress Publications


  • Schajer, G.S. Ed. "Practical Residual Stress Measurement Methods." Wiley, Chichester, UK. 320pp, 2013.
  • Schajer, G. S. and Rickert, T. J. "Incremental Computation Technique for Residual Stress Calculations Using the Integral Method", Experimental Mechanics, Vol.51, No.7, pp.1217-1222, 2011.
  • Mainjot, A.K., Schajer, G.S., Vanheusden, A.J. and Sadoun, M.J. "Influence of Zirconia Framework Thickness on Residual Stress Profile in Veneering Ceramic: Measurement by Hole-drilling", Dental Materials, Vol.28, No.4, pp.378-384, 2012.
  • Mainjot, A.K., Schajer, G.S., Vanheusden, A.J. and Sadoun, M.J. "Residual Stress Measurement in Veneering Ceramic by Hole-Drilling", Dental Materials, Vol.27, No.5, pp.439-444, 2011.
  • Schajer, G.S. "Relaxation Methods for Measuring Residual Stresses: Techniques and Opportunities", Experimental Mechanics, Vol.50, No.8, pp.1117-1127, 2010.
  • Schajer, G.S. and Steinzig, M. "Dual-Axis Hole-Drilling ESPI Residual Stress Measurements", ASME Journal of Engineering Materials and Technology, Vol.132, No.1, pp.71-75, 2010.
  • Schajer, G.S. "Hole-Drilling Residual Stress Measurements at 75: Origins, Advances, Opportunities", Experimental Mechanics, Vol.50, No.2, pp.245-253, 2010.
  • Schajer, G.S. "Advances in Hole-Drilling Residual Stress Measurements", Experimental Mechanics, Vol.50, No.2, pp.159-168, 2010.
  • Schajer, G.S. "Hole-Drilling Residual Stress Profiling with Automated Smoothing". Journal of Engineering Materials and Technology. Vol.129, No.3, pp.440-445, 2007.
  • Schajer, G.S. and Prime, M.B. "Residual Stress Solution Extrapolation for the Slitting Method using Equilibrium Constraints". Journal of Engineering Materials and Technology. Vol.129, No.2, pp.227-232, 2007.
  • Schajer, G.S. and Prime, M.B. "Use of Inverse Solutions for Residual Stress Measurements." ASME Journal of Engineering Materials and Technology. Vol.128, No.3, pp.375-382, 2006.
  • Schajer, G.S. and Steinzig, M. "Full-Field Calculation of Hole-Drilling Residual Stresses from ESPI Data", Experimental Mechanics, Vol.45, No.6, pp.526-532, 2005.
  • Schajer, G.S., “Residual Stresses: Measurement by Destructive Methods.” Section 5a in “Encyclopedia of Materials: Science and Technology”, eds. K. H. J. Buschow et al. Elsevier Science, Oxford. 2001.
  • Schajer, G.S., and Tootoonian, M. "A New Rosette Design for More Reliable Hole-Drilling Residual Stress Measurements", Experimental Mechanics, Vol. 37, No. 3, pp. 299-306, 1997.
  • Schajer, G.S., "Hole Drilling and Ring Core Methods." Sections 2.1-2.3 in "Handbook of Measurement of Residual Stresses", ed, J. Lu. Fairmont Press, Lilburn, GA. 1996. pp.5-20.
  • Schajer, G.S., and Altus, E., "Stress Calculation Error Analysis for Incremental Hole Drilling Residual Stress Measurements", ASME Journal of Engineering Materials and Technology. Vol. 118, No. 1, pp. 120-126, 1996.
  • Tootoonian, M. and Schajer, G.S. "Enhanced Sensitivity Residual Stress Measurements using Taper Hole Drilling", Experimental Mechanics. Vol. 35, No. 2, pp. 124-129, 1995.<
  • Sue, J.A., and Schajer, G.S., "Stress Determination for Coatings.” A chapter in “ASM Handbook, Vol. 5: Surface Engineering”, ASM International, pp. 647-653, 1994.
  • Schajer, G.S., and Yang, L., "Residual Stress Measurement in Orthotropic Materials Using the Hole-Drilling Method", Experimental Mechanics, Vol. 34, No. 4, pp. 324-333, 1994.
  • Schajer, G.S., "Use of Displacement Data to Calculate Strain Gauge Response in Non-Uniform Strain Fields", Strain. Vol. 29, No. 1, pp. 9-13, 1993.
  • Schajer, G.S., "Strain Data Averaging for the Hole-Drilling Method", Experimental Techniques, Vol. 15, No. 2, pp. 25-28, 1991.
  • Schajer, G.S., "Judgment of Residual Stress Field Uniformity When Using The Hole-Drilling Method", Proc. 2nd International Conference on Residual Stresses, Nancy, France, Nov. 23-25, 1988, pp. 71-77.
  • Schajer, G.S., "Measurement of Non-Uniform Residual Stresses Using the Hole-Drilling Method. Part II. Practical Application of the Integral Method", ASME Journal of Engineering Materials and Technology, Vol. 110, No. 4, pp. 344-349, 1988.
  • Schajer, G.S., "Measurement of Non-Uniform Residual Stresses Using the Hole-Drilling Method. Part I. Stress Calculation Procedures", ASME Journal of Engineering Materials and Technology, Vol. 110, No. 4, pp. 338-343, 1988.
  • Schajer, G.S., "Application of Finite Element Calculations to Residual Stress Measurements", ASME Journal of Engineering Materials and Technology, Vol. 103, No. 2, pp. 157-163, 1981.