Elastic Property Measurement of High-Tension Bolt Based on Mode Converted Ultrasound
Elastic properties of high tension bolt are evaluated non-destructively by measuring acoustic longitudinal and shear wave velocities using mode-converted ultrasound. Mode-converted longitudinal and shear waves along bolt are captured to calculate acoustic wave velocities and determine elastic constants such as Young’s modulus and Bulk modulus based on acoustoelasticity. Ray analysis to select a specific mode conversion from longitudinal mode to shear mode is carried out and discussed with experimental results. From experiment results of maximum 5% of measurement error, it is shown that the proposed mode-converted ultrasonic technique is very effective and sensitive enough to characterize mechanical modulus of high-tension bolts quantitatively.
Soon-Bok Lee and Yun-Jae Kim
N. Y. Kim and S. S. Lee, "Elastic Property Measurement of High-Tension Bolt Based on Mode Converted Ultrasound", Key Engineering Materials, Vols. 326-328, pp. 709-712, 2006