16 April 2013 Damage assessment of hydrokinetic composite turbine blades
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Damage assessment of composite blades is investigated for hydrokinetic turbine applications in which lowvelocity impact damage is possible. The blades are carbon/epoxy laminates that are made using an out-of-autoclave process and the blade design is a hydrofoil with constant cross-section. Both undamaged and damaged blades are manufactured and instrumented with strain sensors. Water tunnel testing is conducted with varying flow velocities and for different blade angles. A theoretical simulation is included that is based on finite-element method. The influence of damage on the response characteristics is discussed as an indicator of structural health.
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Steve E. Watkins, Steve E. Watkins, Kevin E. Robison, Kevin E. Robison, James R. Nicholas, James R. Nicholas, Greg A. Taylor, Greg A. Taylor, K. Chandrashekhara, K. Chandrashekhara, Joshua L. Rovey, Joshua L. Rovey, } "Damage assessment of hydrokinetic composite turbine blades", Proc. SPIE 8694, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2013, 86942B (16 April 2013); doi: 10.1117/12.2009840; https://doi.org/10.1117/12.2009840

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