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Temperature significantly impacts structural health monitoring using ultrasonic guided waves in carbon fiber reinforced plastic (CFRP) plates. This study provides benchmark data for developing reliable temperature compensation techniques for accurate damage assessment.

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Area of Science:

  • Materials Science
  • Non-Destructive Testing
  • Acoustics

Background:

  • Structural health monitoring (SHM) systems using ultrasonic guided waves are sensitive to temperature variations.
  • Temperature-induced signal changes can mask or mimic damage, hindering reliable defect detection in materials like carbon fiber reinforced plastic (CFRP).
  • High-quality benchmark data is crucial for developing and validating temperature compensation algorithms.

Purpose of the Study:

  • To investigate the influence of temperature on ultrasonic guided wave propagation in a well-characterized CFRP plate.
  • To provide benchmark measurement data for the Open Guided Waves (OGW) platform.
  • To analyze phase velocity variations with temperature and demonstrate damage detection with temperature effect suppression.

Main Methods:

  • Utilized a fully characterized CFRP plate for controlled experiments.
  • Conducted ultrasonic guided wave propagation analysis across a wide range of frequencies and temperatures.
  • Applied state-of-the-art signal processing methods for temperature effect suppression and damage detection.

Main Results:

  • Quantified phase velocity variations in response to temperature changes in the CFRP plate.
  • Demonstrated the effectiveness of signal processing techniques in mitigating temperature effects for damage detection.
  • Contributed a valuable dataset to the Open Guided Waves (OGW) platform.

Conclusions:

  • Temperature compensation is essential for reliable damage assessment in CFRP structures monitored by ultrasonic guided waves.
  • The generated benchmark data facilitates the development and validation of advanced temperature compensation strategies.
  • This research supports the advancement of robust SHM systems for composite materials.