Measurement of the loss factor and the Young’s modulus in structural steel by using a laser beam reflection method

A laser beam reflection method was newly proposed to measure the loss factor and the Young’s modulus of materials. The loss factor and the Young’s modulus of a structural steel measured by using the proposed method were 0.0024 GPa and 197 GPa, respectively. The results agreed with the measured values obtained by using a conventional laser vibrometer and with other measured values. The agreements ensure the reliability of the laser beam reflection method in measuring the loss factor and the Young’s modulus of materials