A new Aerospace Standard, AS7045 – Residual Stress Measurement and Classification, Metallic Structural Alloy Products and Finished Parts, was recently published by SAE International. Hill Engineering was actively involved in the development of the standard along with many of our collaborators in the aerospace industry. AS7045 offers tremendous potential to revolutionize the management of residual stress during metallic material procurement.
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.
Hill Engineering recently co-authored presentations at the TMS 2023 Annual Meeting & Exhibition in San Diego, CA on March 19th through the 23rd. The TMS Annual Meeting & Exhibition brings together more than 4,000 engineers, scientists, business leaders, and other professionals in the minerals, metals, and materials fields for a comprehensive, cross-disciplinary exchange of technical knowledge. The abstracts for the presentations that we co-authored are copied below.
Strain gages feature in a large portion of the residual stress measurements we perform at Hill Engineering, which is why we pride ourselves on our ability to correctly choose and apply strain gages to fit any measurement needs.
We are very excited today because in this blog we cross an incredible milestone: our 200th post! That’s right. Since the inception of the Hill Engineering blog back in March 2016, we have published 200 times.
Let’s take a look back over the past 7 years of blogging bliss!
Hill Engineering is happy to announce the completion of our Utah office renovations. Working with Gladwell Construction, a licensed general contractor based in Ogden, Utah, we created a thoughtfully designed and functional workspace with our employees, current projects, and future opportunities in mind. Thank you to Gladwell Construction for a job well done.
Strain gages are devices used to measure strain on the surface of an object. These strain measurements can be used to infer the amount of stress induced on the object, as is done with many types of residual stress measurements.
Additionally, strain gages can be used to measure things such as aircraft wing deflection, bridge cable creep, and tensile testing for material properties, making them an ideal tool for in-field measurements.
Strain gages come in many shapes and sizes and can measure strain in a single direction or in multiple directions, depending on the goal of the experiment. Strain gages can be used on a wide variety of materials under many conditions, such as in extreme temperatures or underwater.
Hill Engineering has extensive experience with strain gage application and can help design the experiment needed to reach your project’s goals. Strain gage application can be performed in our laboratory or at your site, to your specifications.
Strain gage application is useful for:
Applications requiring in-field measurements with portable equipment
Measuring strain in multiple directions
Parts in every shape and size – nothing is too big or too small
Measuring residual stress
If you’re interested in how we apply a strain gage to a simple specimen, watch our video:
by Camille Fowler
