Winner of the #namethataircraft Challenge: Gerold Arheilger

Everybody put your hands together for 2018’s #Namethataircraft winner, Gerold Arheilger! For those of you who were unaware, we began a bi-weekly competition this past year where our twitter followers scored points for identifying photographs of aircraft on our twitter account. Continue reading Winner of the #namethataircraft Challenge: Gerold Arheilger

Hill Engineering Holidays: 2018

The holidays are always a special time at Hill Engineering. The end of the year is a busy time for everyone and the annual holiday party at Hill Engineering is always something to look forward to. In addition to residual stress measurements; putting up decorations around the office, playing festive music, and putting on our best holiday sweaters were just some of the things going on during this time of year. Continue reading Hill Engineering Holidays: 2018

Welcome George Kaschner

We would like to welcome George Kaschner to Hill Engineering. George comes to Hill Engineering with more than 30 years of experience, most recently from Los Alamos National Laboratory. George has degrees in Applied Physics and Materials Science & Engineering, and received his Ph.D. from UC Davis in 1997. Since then, he has accumulated significant experience in materials science, materials testing, and data analysis. Continue reading Welcome George Kaschner

Overview of a strain gage

We talk about strain gages a lot in our blogs, vlogs, and all over our website. That’s because strain gages are a crucial element of the work we do at Hill Engineering. Our little rectangular friends are very important sensors for residual stress measurements. That something so small can be so important is astounding, but how exactly do strain gages work? Continue reading Overview of a strain gage

ASIP conference 2018

Hill Engineering is presenting at the upcoming 2018 United States Air Force Structural Integrity Program Conference (ASIP) in Phoenix, AZ. Our talk will focus on residual stress evaluation in legacy aircraft cold expanded fastener holes. The 2018 ASIP Conference is specifically designed to bring together the world leaders in the area of aircraft structural integrity, to disseminate information on state-of-the-art technologies for aircraft structures in both the military and civilian fleets. Hill Engineering’s presentation will include a summary of recent work in airframe structures, demonstrating the effect of aircraft service on the residual stress at cold expanded fastener holes. The abstract text is presented below. Continue reading ASIP conference 2018

Hill Engineering meets Big Trees

Nothing beats the great outdoors, if you ask me. Well, maybe residual stress measurements, but that’s a different story. This summer, the Hill Engineering group drove down to Calaveras Big Trees State Park to take in the sights and sounds of nature, complete with campfire songs, S’mores, and a weekend filled with fun. Continue reading Hill Engineering meets Big Trees

Residual stress measurement techniques

Residual stresses exist in most materials and structures. Processes like forging, rolling, extruding, quenching, additive manufacturing, machining, and welding can cause residual stresses to develop. These stresses can influence the way that materials perform (e.g., fatigue, fracture, distortion, and corrosion). There are many different residual stress measurement techniques available to quantify residual stresses. The following are some examples of common measurement techniques. Continue reading Residual stress measurement techniques

Engineered Residual Stress Implementation workshop 2018

Hill Engineering is proud to support the USAF and their objective to advance damage tolerance analysis methods through the Engineered Residual Stress Implementation (ERSI) workshop. At this year’s ERSI meeting, Hill Engineering will meet with other stakeholders in the USAF aircraft community to review progress over the past year towards implementation of engineered residual stress in the USAF fleet. Continue reading Engineered Residual Stress Implementation workshop 2018