Author: Adrian DeWald

The Lincoln Award is named in honor of Dr. John W. (Jack) Lincoln, the U.S. Air Force’s first Technical Advisor for Aircraft Structural Integrity. Established in 1996, the Lincoln Award is given out annually at the USAF ASIP conference to recognize a distinguished career expert who has made significant contributions toward advancements in aircraft structural integrity and safety. Recipients have dedicated their careers to aircraft structural integrity through contributions to research and development, engineering, or applications. Hill Engineering would like to congratulate Bob Burt (Lockheed Martin Aeronautics) on winning the 2017 Lincoln Award! Continue reading Bob Burt wins 2017 Lincoln Award

We recently answered the question: what is residual stress. As a follow-up for all of our interested readers, today we are addressing the topic of compressive residual stress. Once you understand the concept of residual stress, which is stress that is locked in a material during manufacturing, it is important to distinguish between compressive residual stress and tensile residual stress. Continue reading Compressive residual stress

Hill Engineering is presenting an update on the Engineered Residual Stress Implementation (ERSI) Working Group at the upcoming 2017 North American Residual Stress Summit in Dayton, OH. The Residual Stress Summit brings together residual stress users and developers. Hill Engineering’s presentation will include an overview of ongoing work within the Engineered Residual Stress Implementation Working Group related to cold expanded holes, fatigue and fracture analysis, and similar topics. The abstract text is presented below. Continue reading The Engineered Residual Stress Implementation (ERSI) Working Group

Hill Engineering is presenting about residual stress production quality control at the upcoming 2017 North American Residual Stress Summit in Dayton, OH. The Residual Stress Summit brings together residual stress users and developers. Hill Engineering’s presentation will include an overview of ongoing work related to quality control processes for residual stress in manufacturing. The abstract text is presented below. Continue reading Residual stress production quality control

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 the most recent ERSI meeting, Hill Engineering met 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

Hill Engineering is presenting about material data and fitting processes for fatigue property assessment at the AFGROW Users Workshop 2017 in Layton, UT. The purpose of the workshop is to provide a forum for users to share ideas, demonstrate how AFGROW is being used for practical cases, and discuss future development. Hill Engineering’s presentation will include a summary of a structured material fitting process and how the fit to the fatigue crack growth property data can affect fatigue analysis results. If you are in Layton for the meeting, please feel free to make an appointment to stop by Hill Engineering’s new office. The abstract text is presented below. Continue reading Fatigue crack growth rate data fitting

Hill Engineering is presenting about fatigue analysis at the upcoming AFGROW Users Workshop 2017 in Layton, UT (home of Hill Engineering’s new office). The purpose of the workshop is to provide a forum for users to share ideas, demonstrate how AFGROW is being used for practical cases, and discuss future development. Hill Engineering’s presentation will include a summary of the BAMF software and how it is used to support fatigue crack growth analysis. The abstract text is presented below. Continue reading AFGROW Users Workshop – The Future of BAMF

Hill Engineering is presenting an overview of our ERS-toolbox® software at the upcoming AFGROW Users Workshop 2017 in Layton, UT. The purpose of the workshop is to provide a forum for users to share ideas, demonstrate how AFGROW is being used for practical cases, and discuss future development. Hill Engineering’s presentation will include an overview of past work where ERS-toolbox® was used to support development of laser peening surface treatments to enhance performance of materials using compressive residual stress. The abstract text is presented below. Continue reading ERS-toolbox® at AFGROW Users Workshop