High-accuracy acoustic detection of nonclassical component of material nonlinearity

Sylvain Haupert, Guillaume Renaud, Jacques Rivire, Maryline Talmant, Paul A. Johnson, Pascal Laugier

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

The aim is to assess the nonclassical component of material nonlinearity in several classes of materials with weak, intermediate, and high nonlinear properties. In this contribution, an optimized nonlinear resonant ultrasound spectroscopy (NRUS) measuring and data processing protocol applied to small samples is described. The protocol is used to overcome the effects of environmental condition changes that take place during an experiment, and that may mask the intrinsic nonlinearity. External temperature fluctuation is identified as a primary source of measurement contamination. For instance, a variation of 0.1 C produced a frequency variation of 0.01, which is similar to the expected nonlinear frequency shift for weakly nonlinear materials. In order to overcome environmental effects, the reference frequency measurements are repeated before each excitation level and then used to compute nonlinear parameters. Using this approach, relative resonant frequency shifts of 10 -5 can be measured, which is below the limit of 10 -4 often considered as the limit of NRUS sensitivity under common experimental conditions. Due to enhanced sensitivity resulting from the correction procedure applied in this work, nonclassical nonlinearity in materials that before have been assumed to only be classically nonlinear in past work (steel, brass, and aluminum) is reported.

Original languageEnglish (US)
Pages (from-to)2654-2661
Number of pages8
JournalJournal of the Acoustical Society of America
Volume130
Issue number5
DOIs
StatePublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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