Interlaboratory reproducibility of Deep Hole Drilling residual stress measurements

The Deep-Hole Drilling technique involves drilling a reference hole through the component and accurately measuring its diameter before and after residual stress release by trepanning coaxially around it. The measured deformation of the reference hole (before and after residual stress release) enables the original residual stresses to be calculated using elasticity theory. In 2019 Hill Engineering licensed VEQTER Ltd.’s world-leading Deep-Hole Drilling (DHD) technology. Under this agreement, Hill Engineering is delivering state-of-the-art DHD measurements within the North and South American Continents. This presentation will provide a summary of DHD measurements performed on a steel bent-beam specimen designed to demonstrate the reproducibility of the DHD process between VEQTER and Hill Engineering.