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Adhesive Defect Monitoring of Glass Fiber Epoxy Plate Using an Impedance-Based Non-Destructive Testing Method for
1Future Strategy & Convergence Research Institute, Korea Institute of Civil Engineering & Building Technology, Gyeonggi-Do 10223, Korea. wongi84@naver.com.
Sensors (Basel, Switzerland)
|June 21, 2017
Summary
This study introduces a non-destructive electromechanical impedance method to monitor delamination in composite materials. The technique effectively detects debonding damage in stacked glass fiber epoxy plates, ensuring structural integrity.
Area of Science:
- Materials Science
- Structural Engineering
- Non-Destructive Testing
Background:
- Composite materials are increasingly used in engineering structures, necessitating robust methods for maintaining structural integrity.
- Adhesive bonding is a common joining technique for composites, making delamination monitoring crucial.
- Existing monitoring methods require improvement for comprehensive damage assessment.
Purpose of the Study:
- To evaluate the effectiveness of the electromechanical impedance (EMI) method for detecting delamination in composite materials.
- To assess a multi-area monitoring approach using specific frequency ranges for targeted damage detection.
- To investigate the EMI method's performance with different debonding damage types in stacked composite plates.
Main Methods:
- Utilized the electromechanical impedance (EMI) method, a non-destructive technique.
- Employed a multi-area monitoring strategy by assigning distinct frequency ranges to specific regions of the test specimen.
- Conducted experiments on stacked glass fiber epoxy composite plates with varying numbers of layers.
- Introduced two distinct types of debonding damage to simulate real-world failure scenarios.
Main Results:
- The multi-area EMI method demonstrated capability in monitoring delamination in composite structures.
- Specific frequency ranges were correlated with damage in different sections of the stacked specimens.
- The method showed potential for identifying and localizing debonding damage.
Conclusions:
- The electromechanical impedance method, particularly with a multi-area monitoring approach, is a viable non-destructive technique for assessing structural integrity in composite materials.
- This method offers a promising way to detect and monitor delamination, crucial for ensuring the safety and longevity of composite structures.
- Further research can optimize frequency range selection and sensor placement for enhanced damage detection sensitivity.
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