Advancing elastic wave imaging using thermal susceptibility of acoustic nonlinearity

Kai Wang, Wuxiong Cao, Menglong Liu, Yehai Li, Pengyu Zhou, Zhongqing Su

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


Despite proven effectiveness in characterizing material degradation and embryonic defects, the use of acoustic nonlinearity is restricted by its intrinsic vulnerability to measurement contamination and to fluctuations in ambient temperature in particular. Analytically, we shed light on the susceptibility of acoustic nonlinearity embodied in elastic waves to ambient temperature. Rather than eliminating or compensating for such thermal susceptibility, we subtly exploit it to advance nonlinear elastic wave imaging. Experimental validation corroborates theoretical prediction, spotlighting the capacity of the approach to improve the precision of material characterization using nonlinear elastic waves and therefore to enhance the accuracy of anomaly imaging when other nonlinearity sources interfere with the extraction of nonlinear attributes of elastic waves.

Original languageEnglish
Article number105509
JournalInternational Journal of Mechanical Sciences
Publication statusPublished - 1 Jun 2020


  • Acoustic nonlinearity
  • Elastic wave imaging
  • Elastic wave propagation
  • Material characterization
  • Thermal susceptibility

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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