Hill Engineering Blog

Discover Hill Engineering’s Latest Insights at SEM 2024

We are one month away from the 2024 SEM Annual Conference and Exposition on Experimental and Applied Mechanics, which means our presentation is fast approaching! Taking place in Vancouver, WA, from June 3rd through June 6th, this premier event offers an opportunity for professionals, researchers, and industry experts to come together, share insights, and explore the latest advancements in experimental mechanics.

We invite you to attend our presentation, which will include a summary of recent work relating to residual stress measurement using the hole drilling method. The abstract for the presentation is included below.

Hole drilling is a measurement technique used to determine near surface residual stresses and has been codified in ASTM E837-20. In ASTM E837-20, the minimum allowable distance to a free edge is prescribed as 1.5 times the gauge circle diameter. This work examines the effect arising from the distance from a free edge on a hole drilling measurement and provides an approach to determine residual stress for measurements where the edge distance is closer than that currently permitted by ASTM E837-20. Numerical experiments were performed to understand how the compliance matrices change when the distance from a hole drilling measurement to a free edge varies. In addition, a series of hole drilling measurements were performed at various distances from a free edge using a shot peened aluminum plate with a nominally equibiaxial stress state to demonstrate the approach. The numerical experiments determined that the use of corrected compliance matrices is appropriate when the edge distance is as small as 0.35 times the gauge circle diameter. Physical measurements supported the use of custom compliance matrices for a given free edge distance and specimen thicknesses.

Don’t miss the opportunity to explore these findings and their implications for the field of residual stress at the upcoming conference! If you are planning to attend the conference please stop by to discuss Hill Engineering’s capabilities in fatigue analysis and design and residual stress measurement. Please contact us for more information.