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Proposal Presentation:Multiaxial Fatigue Analysis of Composite Tension-Torsion Straps for Rotor Systems Ryan T. Casey
Tension-Torsion StrapMcDonnell Douglas MD-500E Rotor Head
Common Rotor System Configuration for T-T StrapTension-Torsion Strap Flap Hinge Lead/Lag Hinge Pitch Housing Blade Attachment
Loading Conditions of T-T StrapCF Load Torsional Twist due to Pitch Input Small Flatwise Bending due to Pitch Housing Deflection
Methodology Classical Laminate Theory Develop FEA modelMaterial Properties (E, G, etc…) Develop FEA model Determine Notch Factors Develop Stress Spectrum Multiaxial Fatigue Failure Theories: Max Principal Strain, Von Mises, Max Shear Strain, Lohr-Ellison, Kandil-Brown-Miller
Expected Results Fatigue Life Range Prediction for Composite T-T StrapFEA Models (ANSYS Workbench) Equivalent Material Properties from Laminate Theory Notch Factors
Project Task MilestonesDue Date Research in Classical Laminate Theory & Classical Laminate Theory February 12, 2010 Determine Design Parameters/Requirements Common Stress Spectrum Creation February 19, 2010 Complete FEA of Metal Strap Configuration March 5, 2010 Composite Design concurrent w/ FEM & Fatigue Analysis Finalize Composite Strap Design March 19, 2010 Complete FEM & Fatigue Life Analysis March 26, 2010
Failure criteria for laminated composites
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SCT End-Cap FDR1/11/01 C.J.Nelson 1 Inner Detector SCT End-Cap FDR Summary of Prototyping and FE Analysis C.J.Nelson Rutherford Appleton Laboratory, CLRC.
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