Crack characterization using guided circumferential waves

Christine Valle, Marc Niethammer, Jianmin Qu, Laurence J. Jacobs

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

This paper examines the propagation of guided circumferential waves in a hollow isotropic cylinder that contains a crack, with the goal of using these guided waves to both locate and size the crack. The crack is sized using a modified Auld's formula, which relates the crack's length to a reflected energy coefficient. The crack is then located by operating on the backscattered signal with a time-frequency digital signal processing (DSP) technique, and then comparing these results to those obtained if the cylinder is perfect. The guided circumferential waves are generated with a commercial finite element method (FEM) code. One objective of this work is to demonstrate the effectiveness of using sophisticated DSP techniques to describe the effect of scattering on dispersive waves, showing it is possible to characterize cracks systematically and accurately by quantifying this scattering effect. The results show that the need for high frequency signals to detect small cracks is significantly decreased by using these techniques.

Original languageEnglish
Pages (from-to)1282-1290
Number of pages9
JournalJournal of the Acoustical Society of America
Volume110
Issue number3 I
DOIs
StatePublished - 2001

Fingerprint

Dive into the research topics of 'Crack characterization using guided circumferential waves'. Together they form a unique fingerprint.

Cite this