Novel Pulsed Electromagnetic Field Device for Rapid Structural Health Monitoring: Enhanced Joint Integrity Assessment...

Area of Science:

• Engineering
• Materials Science
• Non-Destructive Testing

Background:

• Structural health monitoring (SHM) is crucial for infrastructure integrity.
• Pulsed electromagnetic fields (PEMF) offer potential for non-destructive evaluation.
• Dynamic testing methods are needed for real-time structural assessment.

Purpose of the Study:

• To investigate a novel PEMF device for dynamic testing and SHM.
• To evaluate the device's efficacy in differentiating joint states and detecting degradation.
• To assess the integrated system's sensitivity compared to traditional methods.

Main Methods:

• Utilized a PEMF generator (CD-1501) and a flat multifilament coil (IC-1).
• Conducted experiments on steel stands with varying joint configurations and plate thicknesses (4 mm, 8 mm).
• Analyzed oscillation patterns, spectral characteristics, resonant frequencies, and Q-factors of specimens.

Main Results:

• The PEMF device differentiated joint states, showing a 15% reduction in high-frequency components for 4 mm vs. 8 mm plates.
• Resonant frequencies near 5100 Hz and Q-factors of 200-300 were observed in 3D-printed specimens.
• A 10% increase in porosity caused a 7% downward shift in resonant frequencies.

Conclusions:

• The developed PEMF device is effective for rapid, non-destructive monitoring of structural joints.
• The integrated system with coaxial correlation shows a 30% improvement in early-stage degradation detection.
• PEMF technology offers a promising advancement in structural health monitoring and non-destructive testing.