Torsional damping properties of an FRP laminated cylinder

The dynamic characteristics of FRP are important for robotic arms and other applications. In this work, we applied a damping capacity concept to the torsional damped oscillation of a laminated composite cylinder. The forecasting method was suggested for the torsional damping characteristic. An experiment was conducted to verify the theory and this calculation method. Good agreement was obtained between the theoretical and the experimental values of seven types of laminated composite cylinder (unidirectional (0 degrees, 90 degrees) plies and cross-plies (+/- 15 degrees, +/- 30 degrees, +/- 45 degrees, +/- 60 degrees, +/- 75 degrees)). This demonstrates that the mathematical technique developed here is satisfactory for predicting the damping of laminated composite cylinders. Torsional damping characteristics of laminated composite cylinders vary with fiber orientation angle.