A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Impact Damage Identification Using Chirped Ultrasonic Guided Waves for Health Monitoring of CFRP Vehicle Structures
Nowadays, carbon fiber reinforced plastic (CFRP) laminates are used as the structural components of mobilities in order to reduce their weight. However, the barely visible impact damages (BVIDs) in CFRP laminates may cause a significant degradation in the performance, seriously affecting the safety of daily use. Hence, structural health monitoring (SHM) systems that can detect the BVIDs in mobilities are urgently needed. In this research, we attempted to establish a method to identify impact damages in mobility structures made of CFRP based on ultrasonic guided waves transmitted and received by macro fiber composites (MFCs). From the response signals, some damage-sensitive features, such as the time of flight (ToF) delay and the amplitude of A0 mode, can be extracted to evaluate the impact damage. The relation between the impact damage size and the maximum ToF delay was investigated for three kinds of CFRP plates: woven, non-woven and hybrid laminates. As a result, it was found that the maximum ToF delay increases linearly with an increase in the damage size for all the CFRP laminates. Moreover, the amplitude of A0 mode was found to be largely affected by the damage length in the wave propagation direction. This attenuation can be used to identify the extension direction of the impact damage as a complement of the ToF delay distribution.
Impact Damage Identification Using Chirped Ultrasonic Guided Waves for Health Monitoring of CFRP Vehicle Structures
Nowadays, carbon fiber reinforced plastic (CFRP) laminates are used as the structural components of mobilities in order to reduce their weight. However, the barely visible impact damages (BVIDs) in CFRP laminates may cause a significant degradation in the performance, seriously affecting the safety of daily use. Hence, structural health monitoring (SHM) systems that can detect the BVIDs in mobilities are urgently needed. In this research, we attempted to establish a method to identify impact damages in mobility structures made of CFRP based on ultrasonic guided waves transmitted and received by macro fiber composites (MFCs). From the response signals, some damage-sensitive features, such as the time of flight (ToF) delay and the amplitude of A0 mode, can be extracted to evaluate the impact damage. The relation between the impact damage size and the maximum ToF delay was investigated for three kinds of CFRP plates: woven, non-woven and hybrid laminates. As a result, it was found that the maximum ToF delay increases linearly with an increase in the damage size for all the CFRP laminates. Moreover, the amplitude of A0 mode was found to be largely affected by the damage length in the wave propagation direction. This attenuation can be used to identify the extension direction of the impact damage as a complement of the ToF delay distribution.
Impact Damage Identification Using Chirped Ultrasonic Guided Waves for Health Monitoring of CFRP Vehicle Structures
Lecture Notes in Civil Engineering
Wu, Zhishen (editor) / Nagayama, Tomonori (editor) / Dang, Ji (editor) / Astroza, Rodrigo (editor) / Tan, Langxing (author) / Yu, Fengming (author) / Saito, Osamu (author) / Okabe, Yoji (author) / Kondoh, Taku (author) / Tezuka, Shota (author)
2022-08-24
8 pages
Article/Chapter (Book)
Electronic Resource
English
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