Detection of surface and subsurface cracks in metallic and non-metallic materials using a complementary split-ring...

Area of Science:

• Materials Science
• Electrical Engineering
• Non-Destructive Testing

Background:

• Existing microwave crack detection methods face challenges in design complexity and high-frequency operation, leading to increased costs.
• Sub-millimeter crack detection requires high-resolution and sensitive techniques for material integrity assessment.

Purpose of the Study:

• To present a simplified and cost-effective microwave-based method for detecting surface and subsurface cracks.
• To demonstrate the efficacy of complementary split-ring resonators (CSRRs) as sensors for crack detection in diverse materials.

Main Methods:

• Utilizing complementary split-ring resonators (CSRRs) patterned on microstrip lines.
• Fabricating CSRR sensors using standard printed circuit board technology.
• Performing numerical analysis and experimental validation of the CSRR sensor's response to cracks.

Main Results:

• The proposed CSRR sensor exhibits high spatial resolution and sensitivity for crack detection.
• The method allows for crack detection in both metallic and non-metallic materials.
• The fabrication process is simple and cost-effective compared to existing techniques.

Conclusions:

• Complementary split-ring resonators offer a promising, simple, and economical solution for surface and subsurface crack detection.
• The developed technique overcomes the limitations of conventional microwave methods in terms of complexity and cost.
• The study validates the potential of CSRR-based sensors for non-destructive evaluation in various industrial applications.