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StressCheck Demo: Benchmarking 3D Stress Concentration Factors via Numerical Simulation
Abstract: A benchmarking-by-FEA case study is performed for a tension bar of circular cross section with a semi-circular groove. The goal was to compute the 3D stress concentration factor by classical approximation (Walter D. Pilkey’s ‘Peterson’s Stress Concentration Factors’, Section 2.5.2) and Numerical Simulation (StressCheck FEA) for several Poisson’s ratio values, and demonstrate the effect of Poisson’s ratio on the 3D stress concentration factors.
For each StressCheck FEA simulation, solution verification was performed to show the maximum stress converged and was independent of degrees of freedom.
Read the a full discussion on this benchmark case study, and how Key Quality Checks must be passed before performing any benchmarking-by-FEA.
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“Through the use of StressCheck® the A-10 Aircraft Structural Integrity Program’s (ASIP) Analysis Group is able to model more accurately the physics of fatigue crack propagation in critical aircraft structure. Through this tool we are able to model, analyze and predict failure of aircraft structure and then develop crucial inspection and maintenance planes to ensure the safety and sustainability of our nations warplanes. Without the analysis capability provided to us through StressCheck® we would not be able to provide accurate assessments of the A-10 structure to top USAF leadership.”
SWRI Research EngineerSouthwest Research Institute