Residual stress measurement Archives

Overcoming Challenges in Residual Stress Measurements on Small Test Specimens Using the Slitting Method

by Ryan Tucci

When it comes to measuring residual stress in small test specimens, precision is paramount. The slitting method is well suited to this application due to the high accuracy of wire EDM machining. However, this method is not without its challenges, especially when applied to very small test specimens, such as the 0.022-inch diameter wire we recently measured.

Publication alert – Multiscale framework for prediction of residual stress in additively manufactured functionally graded material

by Adrian DeWald

Hill Engineering recently published new research with collaborators from around the world including South Korea, Australia, China, and the United Kingdom. The work is titled Multiscale framework for prediction of residual stress in additively manufactured functionally graded material. The abstract text is available here along with a link to the publication.

New Case Study – TrueSlot®

by Robert Pires

Our latest case study is up and it’s all about TrueSlot®, our innovative technique for measuring near-surface residual stress!

A solid model block with a long but thin slot cut out of the top. — A model of a completed TrueSlot® method measurement.

Advances in Residual Stress Technology in honor of Drew Nelson

by Adrian DeWald

A special Issue of Experimental Mechanics on Advances in Residual Stress Technology in Honor of Drew Nelson was recently published. The Special Issue recognizes Dr. Nelson, Mike’s PhD advisor at Stanford University and a leader in the residual stress community, on becoming emeritus after 40 years of research contributions and teaching on the experimental determination of residual stresses and their effects on fatigue.

Hill Engineering featured in Railway Track & Structures – August 2022

by Camille Fowler

We recently learned that some hole drilling method and contour method results were highlighted in the August 2022 issue of Railway Track and Structures. The article is titled Residual stress investigation of ultrasonic impact treated and untreated thermite welds.

Short Course Announcement – Residual Stress 101

by Adrian DeWald

The upcoming SEM Annual Conference and Exposition on Experimental and Applied Mechanics will include a Pre-conference Course titled: Residual Stress 101. The residual stress short course is scheduled for Sunday, June 12, 2022, from 9:00 a.m. to 5:00 p.m.

The course aims to cover a broad, practical introduction to residual stresses for students, researchers and industrialists with an interest in the subject. The course will be taught by Michael Prime, Michael Hill, Adrian DeWald, Luliana Cernatescu, Jeff Bunn, and Gary Schajer. Registration is currently open through the SEM Website.

Contour Method 101: Two-Dimensional Mapping of Residual Stress

by Robert Pires

We talk a lot about the residual stress measurement techniques we employ at Hill Engineering. One of the most commonly used is the Contour Method! Invented in the year 2000, and patented by Los Alamos National Laboratory, the contour method measures 2D residual stresses over a planar surface.

In the Field with Ryan: On-site Residual Stress Measurements

by Robert Pires

While we at Hill Engineering take pride in our ability to perform high quality residual stress measurements in our laboratory, we recognize that not all parts and projects can be easily transported.

That’s where we bring the measurements to you with our Residual Stress Field Team. Our laboratory engineers are capable of performing residual stress measurements across the globe, and have done so on many occasions.

Special Issue of Experimental Mechanics

by Adrian DeWald

We are in the process of organizing a special Issue of Experimental Mechanics, the journal of the Society for Experimental Mechanics. The issue will be devoted to Advances in Residual Stress Technology in honor of Prof. Drew Nelson of Stanford University, for teaching several thousand engineering students about the importance of residual stresses and for developing new optically based approaches for measurement of residual stresses, along with studies of residual stress effects on fatigue. To date, we have accepted proposed paper topics from almost 20 world-leading authors from around the globe.

Case Study: DART – automated residual stress measurement

by Robert Pires

Our latest case study highlights the many benefits of the DART™ automated measurement system, a tool we at Hill Engineering developed specifically to improve near-surface residual stress measurement techniques such as hole drilling and TRUEslot®.