Corner crack at the edge of the hole inserted after cold-working. Contour show the progression of crack opening as the external load is increased from 0 to 27 ksi. First noticeable crack opening appears around 19 ksi.

ESRD’s Dr. Ricardo Actis attended and presented with technology partner Analytical Processes/Engineered Solutions (AP/ES) at the Engineered Residual Stress Implementation (ERSI) Workshop 2018 in Clearfield, UT.  This annual workshop is focused on the development of a damage tolerance methodologies for fatigue crack growth through deep Engineered Residual Stress (ERS) fields.

Sponsored by the US Air Force’s A-10 Airframe Structural Integrity Program (ASIP), the goal of this workshop is to develop a roadmap for the implementation of the beneficial effect of engineered residual stresses within the United States Air Force (USAF) Damage Tolerance Analysis (DTA) fatigue crack growth and lifing programs.

At ERSI Workshop 2018, Dr. Ricardo Actis (ESRD) and Dr. Thomas Mills, Dr. Scott Prost-Domasky, and Mr. Craig Brooks (AP/ES) presented “RS Crack Closure: Experimental Observations and Modeling”, the PDF of which can be downloaded below:

The ERSI Workshop 2018 attendees are shown below:

Attendees to the Third ERSI Workshop.

ESRD, Inc. continues to work closely with AP/ES and the USAF to develop and implement accurate solutions for challenging Durability and Damage Tolerant applications.