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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“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”