Interaction of Lamb Wave Modes with Weak Material Nonlinearity: Generation of Symmetric Zero-Frequency Mode

Xiaoqiang Sun, Xiangyan Ding, Feilong Li, Shijie Zhou, Yaolu Liu, Ning Hu, Zhongqing Su, Youxuan Zhao, Jun Zhang, Mingxi Deng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


The symmetric zero-frequency mode induced by weak material nonlinearity during Lamb wave propagation is explored for the first time. We theoretically confirm that, unlike the second harmonic, phase-velocity matching is not required to generate the zero-frequency mode and its signal is stronger than those of the nonlinear harmonics conventionally used, for example, the second harmonic. Experimental and numerical verifications of this theoretical analysis are conducted for the primary S0 mode wave propagating in an aluminum plate. The existence of a symmetric zero-frequency mode is of great significance, probably triggering a revolutionary progress in the field of non-destructive evaluation and structural health monitoring of the early-stage material nonlinearity based on the ultrasonic Lamb waves.

Original languageEnglish
Article number2451
JournalSensors (Switzerland)
Issue number8
Publication statusPublished - Aug 2018


  • Nonlinear lamb waves
  • Structural health monitoring
  • Zero-frequency mode

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

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