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Proposal Presentation:. Multiaxial Fatigue Analysis of Composite Tension-Torsion Straps for Rotor Systems Ryan T. Casey. Tension-Torsion Strap. McDonnell Douglas MD-500E Rotor Head. http://upload.wikimedia.org/wikipedia/commons/2/29/Md500e-rotorhead-aradecki-070316-01.jpg. Lead/Lag Hinge. - PowerPoint PPT Presentation

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  • Proposal Presentation:Multiaxial Fatigue Analysis of Composite Tension-Torsion Straps for Rotor Systems

    Ryan T. Casey

  • Tension-Torsion Straphttp://upload.wikimedia.org/wikipedia/commons/2/29/Md500e-rotorhead-aradecki-070316-01.jpg McDonnell Douglas MD-500E Rotor Head

  • Common Rotor System Configuration for T-T Strap

  • Loading Conditions of T-T StrapCF LoadTorsional Twist due to Pitch InputSmall Flatwise Bending due to Pitch Housing Deflection

  • MethodologyClassical Laminate TheoryMaterial Properties (E, G, etc) Develop FEA model Determine Notch FactorsDevelop Stress SpectrumMultiaxial Fatigue Failure Theories:Max Principal Strain, Von Mises, Max Shear Strain, Lohr-Ellison, Kandil-Brown-Miller

  • Expected ResultsFatigue Life Range Prediction for Composite T-T StrapFEA Models (ANSYS Workbench)Equivalent Material Properties from Laminate TheoryNotch Factors

  • Project Task Milestones

  • Questions?????