H-Drill - Useful Links

The Contour Method for Measuring Residual Stress, Michael Prime, Los Alamos National Lab, USA.
The Slitting (Crack Compliance) Method for Measuring Residual Stress, Michael Prime, Los Alamos National Lab, USA.
National Physical Laboratory, UK, provides extensive information on techniques for measuring residual stress.

The Residual Stress Summit meets every 2-3 years to discuss industrial residual stress measurements and applications.
International Conference on Residual Stress, ICRS, meets every four years.
European Conference on Residual Stress, ECRS, also meets every four years.

Vishay Micro-Measurements makes a wide range of strain gauges and associated instrumentation. They also supply specialized strain gauge rosettes for hole-drilling measurements and a milling guide for drilling the holes.
American Stress Technologies and Stresstech make sophisticated equipment for residual stress measurements by the ESPI hole-drilling method and by Barkhausen noise.
SINT Technology makes automated equipment for residual stress measurements by the strain gauge hole-drilling and ring-core methods.

Stresscraft, Leicestershire, UK, specializes in hole-drilling residual stress measurements.
Hill Engineering, California, USA, does residual stress measurements by the slitting, contour and hole-drilling methods.
Stressmap, a part of the Open University in the UK, does measurements using the contour method.
Veqter uses the Deep Hole Drilling technique method for industrial residual stress measurements.