| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 봄 (04/09 ~ 04/10, 고려대학교) |
| 권호 |
29권 1호, p.139 |
| 발표분야 |
복합재료 |
| 제목 |
Interfacial Evaluation of Surface Treated Single-Carbon Fiber/Epoxy Composites using Micromechanical Test and Acoustic Emission |
| 초록 |
Interfacial shear strength (IFSS) between fiber and matrix is one of the important factors in controlling mechanical performance for fiber reinforced polymer composites. If the IFSS is too low, it is difficult to expect the performance of the fiber reinforced composites, whereas if the IFSS is too high, crack can propagate. It may be necessary that IFSS should be determined by an optimization in accordance with the final purpose. In this work, to select optimum fiber and matrix system, interfacial properties between surface treated carbon fiber and various epoxy matrices were evaluated by micromechanical techniques combined with nondestructive acoustic emission (AE). Tensile strength of the untreated and treated fibers obtained from single-fiber tensile test was analyzed statistically by uni- and bimodal Weibull distribution. Mechanical properties of various epoxy/curing agent systems were measured by tensile and three-point bending tests, and they were compared to each other. IFSS between surface treated carbon fiber and epoxy matrix with high toughness was higher than that of the untreated carbon fiber/brittle epoxy composites. For semi- and nontransparent epoxy matrix, IFSS was measured indirectly by AE method which critical fragments length was calculated by relationship between gauge length and the number of fiber fracture signal. IFSS obtained from micromechanical test was consistent with AE method case. Acknowledgement: This study was supported by Agency for Defence Development (ADD) through ReCAPT, GNU. |
| 저자 |
Tran1, Quang Son2, 김대식1, 박종만2, 박재범1, 황태경2
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| 소속 |
1경상대, 2항공기부품기술연구센터 |
| 키워드 |
Interfacial shear strength; Acoustic emission; Surface treatment
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| E-Mail |
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