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"Structural Analysis Software Tool Transitions Across DoD and in the Commercial Marketplace"
"An advanced modeling and analysis tool for complex composite structures is generating benefits across the aerospace industrial base. StressCheck is widely viewed as the next-generation composite joint strength tool." Read more...
AFRL (February 2007)
"The addition of incremental theory of plasticity in StressCheck has greatly improved our ability to accurately predict the fatigue life of joints with interference fit fasteners and cold worked holes"
"This ability is especially important, not only in support of maintaining aging aircraft but also in analyzing some of the new cold working techniques that have occurred in recent years. Prior to this implementation, analyst often relied on closed-form approximations or simple factors that were often overly conservative and sometimes even unconservative when used in life prediction. Now, not only can we more accurately predict residual stresses in these complex structural joints, we can do so in a timely manner given the modeling and analysis efficiency that exists with a p-version FEA code such as StressCheck."
The Boeing Company (October 2006)
"Success Story - F-35 Program Adds StressCheck to Analysis Software Suite"
The "StressCheck analysis tool shows significant improvement in bonded and co-cured joint strength prediction capabilities compared to finite element analysis tools currently on the market. Preliminary applications on the F-35 inlet duct assembly joints and independent validation increased program confidence to use this tool on additional structures. As a result of the success with this initial application, the value of the StressCheck analysis tool was recognized for stress analysis of complex composite structural details, and the use of this software on the F-35 program has expanded." Read more...
Air Force Research Lab (August 2004)
"This new software tool will play an important role in making composites more affordable"
The software provides a highly reliable and user-friendly production stress analysis tool that will replace the Finite Element Method (FEM) tools and failure criteria the experts currently employ for analyzing bonded joints. The software includes an FEM-based handbook format, which allows non-experts to utilize models prepared by specialists. The handbook problems include built-in failure criteria, geometric and material nonlinearities, and the modern FEM technology provides better error control and the treatment of very large aspect ratios."
Dr. Stephen P. Engelstad (July 2003)
Technical Fellow
Lockheed Martin Aeronautics Company
Structural Methods and Analysis
"Aerospace materials scientists and structural engineers now have a new state-of-the-art software product called StressCheck, which provides efficient and reliable analysis tools for composite bonded aircraft structures. A composites research team from the aeronautics industry, known as the Composites Affordability Initiative (CAI), has just completed an extensive study of current capabilities in the area of failure analysis tools for composite bonded joints. This study led the CAI team to unanimously choose StressCheck as the software tool to replace as well as radically improve existing industry standard software currently used to size bonded joints."
Air Force Research Laboratory (AFRL) Web Page (May 1999)
"We have been having very good success using the P-Version finite element code, StressCheck, to develop the 2-D solutions for two independent cracks in a plate.
I have asked one of our AFGROW team members … to model the plate and lug cases using StressCheck and compare them to the existing AFGROW closed-form solutions. [He] modeled the cases several different ways to be sure that he was getting the best possible solutions. He has verified that the bearing load option in StressCheck provides excellent results…"
Jim Harter
Team Leader-Analytical Fatigue/Fracture Reliability Team
Air Force Research Laboratory (AFRL)
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