ABSTRACT: WAVE MODES PRODUCED BY AIR COUPLED ULTRASOUND

ABSTRACT:
WAVE MODES PRODUCED BY AIR COUPLED ULTRASOUND

by Jan O. Strycek, Willem A. Grandia, and Hanspeter Loertscher *
Presented on the Application Workshop in May '97

ABSTRACT

The article present results on composites which were tested successfully with plate waves by Air-coupled ultrasonic techniques. A prerequisite for the successful application of guided waves in most cases is a surface which does not damp the surface wave. This precludes the use of liquid couplants, therefore special dry coupled transducers must be used. Investigations are in progress to further exploit the potential of plate and surface waves for economical nondestructive testing procedures.

Table of contents

Fulltext

Authors:

Willem A. Grandia, P.E.
Bill Grandia is founder and president of QMI, where he directs R&D. He is a senior electronic and quality engineer, recognized worldwide for his achievements in designing ultrasonic and Eddy Current instrumentation. He started his career in 1955 in Holland.

Jan Strycek
Jan serves as Vice-President for Technique Development and Marketing. He acquired in over 25 years an outstanding record in practical testing of a large variety of materials and structures. Jan is recognized and called upon worldwide as an expert for the most difficult and critical NDT tasks.

Hanspeter Loertscher
Hanspeter joined the company 2 years ago. He received his Master Degree in Physics in 1972 from the University of Bern, Switzerland and is specialized in laser development and applications, including laser based ultrasonics, and in ultrasonic testing of composite structures.

All authors are with QMI Inc., Costa Mesa CA, USA. E-mail: ultrasonics@qmi-inc.com, Home Page

The paper was presented on the Application Workshop in May '97

| UTonline | |'97 Index of UTonline Abstracts|