Fatigue Life Prediction of Flaw-Tolerant Damaged Rotorcraft Structures
Abstract: Paper presented at the American Helicopter Society Annual Forum 74 in Phoenix, Arizona May 14-17, 2018: Fatigue Life Prediction of Flaw-Tolerant Damages Rotorcraft Structures. The presentation and paper report the work done by ESRD and NAVAIR under a SBIR program to develop an analytical approach to predicting the remaining useful fatigue life of metallic components with surface flaws.
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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.”
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