Paper Title:
Simultaneous Measurement of Longitudinal and Transverse Waves Velocities Employing Spherically Focused Acoustic Transducer
  Abstract

Scanning acoustic microscopy (SAM) has been applied successfully to measure leaky surface wave(LSAW) velocity from V(z) curve for material characterization. Besides LSAW, SAM produces a variety of wave modes in the material propagating with different phase speeds and features, one of which is the mode-converted ultrasound. In this paper, a novel method for simultaneous measurement of longitudinal and transverse acoustic wave velocities using the mode-converted ultrasound is developed and studied at SAM. Each ultrasound arriving at the acoustic lens with different speed and phase (or time-of-flight (TOF)) is measured by the defocused transducer to calculate longitudinal and transverse wave velocities. Simple mathematical ray analysis for the mode conversion is conducted to determine the relationship of acoustic velocities with TOF of the waves in plate. Experimental results for metals and glass show that the longitudinal and transverse wave velocities measured by the proposed method are as accurate as maximum 3% in error.

  Info
Periodical
Key Engineering Materials (Volumes 321-323)
Edited by
Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi
Pages
574-577
DOI
10.4028/www.scientific.net/KEM.321-323.574
Citation
N. Y. Kim, C. K. Lee, "Simultaneous Measurement of Longitudinal and Transverse Waves Velocities Employing Spherically Focused Acoustic Transducer", Key Engineering Materials, Vols. 321-323, pp. 574-577, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ho Dong Yang, Yool Kwon Oh
Abstract:The present study is investigated the causes of enhanced heat transfer during the melting process of solid-liquid PCM (Phase Change...
1145
Authors: Samia Bouhedja, F. Hamdi
Chapter III: Applications
Abstract:In this work, we study the microstructure of porous alumina Al2O3 through the acoustic signature behavior V(z). This...
493
Authors: Zhong Zhu Liu, Chun Guang Xu, Xin Yu Zhao, Xiang Hui Guo
Chapter 3: Industrial Robotics and Automation
Abstract:Scanning acoustic microscopy (SAM) is a powerful non-destructive testing tool used in electronic, material and medical testing area....
1128
Authors: Yang Yu, Yang Yu
Chapter 2: Materials Science and Engineering
Abstract:This paper studies the cylindrical acoustic emission signal generation, propagation and attenuation. Acoustic emission signal is a form of...
727
Authors: Zhi Gang Li, Shi Tong Ge, Zhi Chuan Guan
Chapter 5: Oil and Gas Well Development Projects
Abstract:In order to Make Use of Acoustic Wave to Transmit the Information from near- Bit End to a Remote Bit End, Using the Finite Element Method,...
1335