Measurements of elastic moduli and damping ratios were investigated for glass fiber reinforced pultruded composite beams at frequencies up to 1200 Hz. Pultrusion is one of the basic manufacturing processes in the composite industry that converts primary materials directly into finished product continuously and automatically.
The facilities for pultrusion process was developed to manufacture specimens for this investigation. The process variables of pultrusion were examined by the effect of these variables on the longitudinal flexural Young's modulus. Curing temperature and component ratios were considered in the case of fixed constant pulling speed.
The elastic moduli and damping ratios were determined from the resonance frequencies and quality factor. The resonance frequencies were observed by Digital Signal Analyzer through impact testing and Young's moduli were obtained using classical Bernoulli-Euler beam theory.
