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Acoustic Source Localization in CFRP Composite Plate Based on Wave Velocity-Direction Function Fitting.

Yu Zhang1, Yu Feng1, Xiaobo Rui1

  • 1State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072, China.

Sensors (Basel, Switzerland)
|March 30, 2023
PubMed
Summary
This summary is machine-generated.

This study presents an acoustic emission time-difference method for pinpointing impact locations on carbon fiber reinforced polymer (CFRP) composite plates. The technique accurately identifies impact points, enhancing structural safety assessments.

Keywords:
composite materiallocalizationtime difference matrixvelocity-direction function

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Structural Health Monitoring

Background:

  • Composite materials are susceptible to impact damage, necessitating effective methods for damage detection and localization.
  • Accurate impact point identification is crucial for ensuring the structural integrity and safety of composite components in various applications.

Purpose of the Study:

  • To develop and validate an acoustic source localization technique for impact events on composite plates.
  • To investigate the application of Lamb wave propagation characteristics for precise impact localization.
  • To establish a reliable method for real-time impact sensing in carbon fiber reinforced polymer (CFRP) structures.

Main Methods:

  • Acoustic source localization using a wave velocity-direction function fitting approach.
  • Grid division of composite plates to construct theoretical time difference matrices.
  • Comparison of theoretical and experimental time differences to generate an error matching matrix for localization.
  • Finite element simulation and lead-break experiments to explore Lamb wave behavior and validate the localization method.

Main Results:

  • The proposed acoustic emission time-difference approximation method effectively solves impact source localization challenges in composite structures.
  • The method demonstrated good stability and accuracy, with an average localization error of 1.44 cm and a maximum error of 3.35 cm across 49 experimental points.
  • Finite element simulations successfully verified the feasibility of the localization approach.

Conclusions:

  • The acoustic emission time-difference method is a viable and accurate technique for impact localization in CFRP composite plates.
  • The developed method contributes to advancing structural health monitoring technologies for composite materials.
  • The findings support the enhanced safety and reliability of composite structures through precise impact detection.