Numerical modeling with experimental verification investigating the effects of nonlinearities on the sideband peak count-index technique and topological acoustic sensing

Guangdong Zhang, Bo Hu, Hamad Alnuaimi, Umar Amjad, Pierre A. Deymier, Keith A Runge, Tribikram Kundu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A newly developed nonlinear ultrasonic (NLU) technique called sideband peak count-index (or SPC-I) measures the degree of nonlinearity in materials by counting the sideband peaks above a moving threshold line – larger the SPC-I value, higher is the material nonlinearity. In various published papers, the SPC-I technique has shown its effectiveness in structural health monitoring (SHM) applications. However, the effects of different types of nonlinear phenomenon on the sideband peak generation is yet to be investigated in depth. This work addresses this knowledge gap and investigates the effects of different types of nonlinearity on the SPC-I technique. Three types of nonlinearity (material nonlinearity, structural nonlinearity and contact nonlinearity) are investigated separately through numerical modeling. Numerical modeling results show that the sideband peak values do not increase proportional to the input signal strength thus indicating nonlinear response, and different types of nonlinearities affect the SPC-I measurements differently. For the experimental verification a composite plate with impact-induced damage is considered for investigating the material nonlinearity and structural nonlinearity while a linear elastic aluminum plate is used to examine the contact nonlinearity between the transducers and the plate. The trends observed in the experimental observations matched the numerical model predictions. Monitoring damage growth in topographical structures – formed by inserting different materials in a matrix material is also investigated. In addition to the SPC-I technique an emerging acoustic parameter – “geometric phase change” based on the topological acoustics is also adopted for sensing damage growth in the topographical structures. The performance of SPC-I and topological acoustic sensing techniques as well as the spectral amplitude difference (SAD) parameter for sensing the damage growth in topographical structures are compared and discussed.

Original languageEnglish (US)
Title of host publicationHealth Monitoring of Structural and Biological Systems XVIII
EditorsZhongqing Su, Kara J. Peters, Fabrizio Ricci, Piervincenzo Rizzo
PublisherSPIE
ISBN (Electronic)9781510672086
DOIs
StatePublished - 2024
EventHealth Monitoring of Structural and Biological Systems XVIII 2024 - Long Beach, United States
Duration: Mar 25 2024Mar 28 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12951
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHealth Monitoring of Structural and Biological Systems XVIII 2024
Country/TerritoryUnited States
CityLong Beach
Period3/25/243/28/24

Keywords

  • geometric phase change
  • nonlinear ultrasonic technique
  • numerical modeling
  • SPC-I technique
  • spectral amplitude difference
  • Structural health monitoring
  • topological acoustic sensing

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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