| 학회 | 한국재료학회 |
| 학술대회 | 2008년 가을 (11/07 ~ 11/07, 차세대융합기술연구원) |
| 권호 | 14권 2호 |
| 발표분야 | 구조재료 |
| 제목 | Self-Diagnosis Function of Fiber Reinforced Plastics Containing Electrically Conductive Phase |
| 초록 | The overall deterioration of structural materials due to aging or disaster has resulted in the expansion of demand for non-destructive evaluation of health condition. Recently, the health monitoring technique utilizing the syructural materials with function to diagnose own conditions, so-called self-diagnosis materials or intelligent materials, has been attracting attentions. Some methods of the fracture detection in the fiber reinforced plastics which were applied to structural materials as a reinforcement have been proposed. Muto et al. have reported that the electrical resistance change in carbon-fiber glass-fiber reinforced plastics were applied to monitor the fatal fracture. The electrical characteristics of fiber reinforced plastics composites have been investigated in order to develop the self-diagnosis function suitable for health monitoring of structural materials. The electrical conductivity was achieved by adding carbon particles or fiber as a conductive phase into fiber reinforced plastics. The self-diagnosis function of the composites was evaluated by the measurement of charge in electrical resistance as a function of stress or strain in tensile tests. The resistance of carbon fiber in the composites slightly changed at a small strain level and increased nonlinearly with the applied stress due to fracture of carbon fiber. The conductive fiber reinforced plastics composite containing carbon particles had high sensitivity and linear response of the resistance in a wide strain range. In the cyclic loading tests, the phenomenon of residual resistance was observed at an unloading state in the composites with carbon particles. The residual resistance increased with an applied maximum strain, showing that the composites with carbon particles possesses the function to memorize the applied maximum strain or stress. These results indicate that the fiber reinforced plastics composite containing carbon particles has a promising possibility for simple diagnosis of dynamic damage and for damage hysteresis with high sensitivity. |
| 저자 | 신순기 |
| 소속 | 강원대 |
| 키워드 | self-diagnosis; health monitoring; composite; electrical resistance; fiber reinforced plastics; carbon; percolation structure |
