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Related Experiment Video

Updated: Jan 25, 2026

Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
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Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method

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High-Resolution Crack Localization Approach Based on Diffraction Wave.

Weilei Mu1, Jiangang Sun2, Guijie Liu3

  • 1Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao 266100, China. tblueapple@126.com.

Sensors (Basel, Switzerland)
|April 28, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a new crack localization method using diffraction wave theory to image crack endpoints, overcoming limitations of previous hole-damage detection techniques for structural monitoring.

Keywords:
damage imagingdispersionhigh resolution detectionultrasonic guided wave

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Area of Science:

  • Structural Health Monitoring
  • Non-Destructive Testing
  • Wave Propagation

Background:

  • The delay-and-sum imaging algorithm is effective for hole-like damage localization.
  • Cracks are more prevalent structural damage than holes.
  • Existing methods struggle with accurate crack endpoint detection.

Purpose of the Study:

  • To develop a crack localization approach capable of imaging crack endpoints.
  • To improve upon existing methods for detecting crack-like damages.

Main Methods:

  • Utilizing diffraction wave theory for crack endpoint imaging.
  • Employing a line sensor array to record diffraction waveforms.
  • Applying dispersion and half-wave compensation for enhanced accuracy.

Main Results:

  • Successfully imaged crack endpoints with high resolution.
  • Demonstrated the effectiveness of the diffraction wave-based approach.
  • Validated the method through an experimental example.

Conclusions:

  • The proposed method accurately localizes crack endpoints.
  • This technique offers a significant advancement for crack detection and structural monitoring.