A thermal sensitivity-based approach for enhancing robustness of ultrasonic evaluation of material acoustic nonlinearity

Kai Wang, Zhongqing Su, Shenfang Yuan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Despite demonstrated effectiveness in characterizing material properties or defect, the evaluation of material acoustic nonlinearity is highly prone to measurement contaminations introduced by various practical factors and the low robustness restricts its application. In order to obtain a precise quantification of the material acoustic nonlinearity in a robust manner, an approach based on the thermal fluctuations in nonlinear features of ultrasonic waves is developed. In this approach, the influence of temperature and defect on the interatomic distance is scrutinized analytically, and on this basis, the nonlinear features of ultrasonic waves linked with the temperature and defect is ascertained explicitly, whereby a thermal sensitivity index is proposed. With this thermal sensitivity index, the material acoustic nonlinearity can be evaluated without being affected by contaminations from practical sources, and therefore the defect which intensifies the material acoustic nonlinearity can be identified in a robust manner. Experimental validation corroborates the theoretical prediction, demonstrating that the proposed thermal sensitivity-based approach is capable of enhancing the robustness of material acoustic nonlinearity evaluation and defect characterization.

Original languageEnglish
Title of host publicationHealth Monitoring of Structural and Biological Systems XIII
EditorsPaul Fromme, Zhongqing Su
PublisherSPIE
ISBN (Electronic)9781510625990
DOIs
Publication statusPublished - 1 Jan 2019
EventHealth Monitoring of Structural and Biological Systems XIII 2019 - Denver, United States
Duration: 4 Mar 20197 Mar 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10972
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHealth Monitoring of Structural and Biological Systems XIII 2019
Country/TerritoryUnited States
CityDenver
Period4/03/197/03/19

Keywords

  • Defect characterization
  • Material acoustic nonlinearity
  • Robustness enhancement
  • Thermal sensitivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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