Hole-Drilling Method for Measuring Residual Stresses

Gary S. Schajer is a Professor in the Department of Mechanical Engineering at the University of British Columbia, Vancouver, Canada. He has extensive experience with residual stress measurements, notably the hole-drilling method using strain gauges, Electronic Speckle Pattern Interferometry (ESPI), and Digital Image Correlation (DIC). Prof. Schajer has published extensively on residual stress and related topics and recently edited the reference book Practical Residual Stress Measurement Methods. 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. Philip S. Whitehead is the Managing Director of Stresscraft Limited, located in Shepshed, Leicestershire, England. The company provides hole-drilling residual stress measurement services for academic and industrial customers, principally in the fields of aerospace and advanced material processing. Philip has 30 years of experience in the application of the strain gauge hole-drilling method and has designed and developed the many specialized hole-drilling devices used by Stresscraft. He continues to create novel drill head and strain gauge rosette designs to extend the application of the method. Current areas of interest include hole-drilling at remote features with limited access.

• Preface.- Nature and Source of Residual Stresses.- Relaxation Type Residual Stress Measurement Methods.- Hole-Drilling Method Concept and Development.- Strain Gauge Technique: Method Description.- Stress Computations.- Example Practical Procedures and Results.- Optical Techniques.- Authors' Biographies.- Index .