Abstract
This paper presents an analytical method for predicting flexural damping capacity of laminated composite beams made of carbon fiber reinforced thermoplastics (CF/PEEK). The effects of fiber orientation angle, stacking sequence and the laminate geometry on flexural damping capacity and resonance frequency are discussed by decomposing the laminate energy dissipation associated with each of three resulting stress components. Each of the energy dissipation terms is then identified, and their effects on damping capacity are examined by calculating their contributions to the total laminated energy dissipation. For comparison with the analytical results, an experimental study for measuring damping capacity and resonance frequency of a cantilever laminated composite beam was carried out by an impulse-frequnecy response technique. A good agreement obtained between the analytical and the experimental results of off-axis and cross-ply laminates shows that the analytical method developed here is satisfactory for predicting flexural damping and resonance frequency.
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