Optical visualization of acoustic wave propagating along the wedge
tip

Che-Hua Yang; I-Hung Liu

doi:10.1117/12.904838

15 November 2011 Optical visualization of acoustic wave propagating along the wedge tip

Che-Hua Yang, I-Hung Liu

Author Affiliations +

Proceedings Volume 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation; 83211W (2011) https://doi.org/10.1117/12.904838
Event: Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 2011, Yunnan, China

Abstract

Machine tool blades exhibit typical wedge-shaped tips where defects are very likely to exist and call for non-destructive characterization. In order to detect the defect on the wedge tip, the interaction of wedge wave with defect characteristic needs to be investigated. Antisymmetric flexural (ASF) modes are wedge waves (WW) with their particle motion antisymmetric about the mid-plane bisecting and energy tightly confined near the wedge tip. A quantitative laser ultrasound visualization (QLUV) system which employs a pulsed laser to scan over the interested area then detected with a piezoelectric transducer. With the aid of reciprocal theorem, dynamic behaviors of ASF modes encountering a defect can be reconstructed. In this research, the QLUV system is used to evaluate the characteristic of WWs and the phenomenon of defect effect including mode conversion and the scattering intensity. With the QLUVS behaviors of ASF modes interacting with a wedge-tip-crack are characterized in a quantitative way. More complex behaviors for higherorder ASF interacting with cracks are under investigation.

Citation Download Citation

Che-Hua Yang and I-Hung Liu "Optical visualization of acoustic wave propagating along the wedge tip", Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211W (15 November 2011); https://doi.org/10.1117/12.904838

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