Experimental characterization of material nonlinearity using Lamb waves

Christian Bermes, Jin Yeon Kim, Jianmin Qu, Laurence J. Jacobs

Research output: Contribution to journalArticlepeer-review

211 Scopus citations

Abstract

The objective of this research is to develop an accurate and reliable procedure to measure the second order harmonic of a Lamb wave propagating in a metallic plate. There are two associated complications in measuring these nonlinear Lamb waves, namely, their inherent dispersive and multimode natures. To overcome these, this research combines a time-frequency representation with a hybrid wedge generation and laser interferometric detection system. The effectiveness of the proposed procedure is demonstrated by characterizing the inherent material nonlinearity of two different aluminum plates whose absolute nonlinearity parameters are known from longitudinal wave measurements.

Original languageEnglish
Article number021901
JournalApplied Physics Letters
Volume90
Issue number2
DOIs
StatePublished - 2007

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