| 학회 | 한국고분자학회 |
| 학술대회 | 2002년 봄 (04/12 ~ 04/13, 서울대학교) |
| 권호 | 27권 1호, p.218 |
| 발표분야 | 복합재료 |
| 제목 | Interfacial Properties of in-situ 3 Dimensional Hexagonal Glass Fiber/Epoxy Composites using Fragmentation Test and FEM |
| 초록 | Fracture phenomena in fiber-reinforced composites can be the result of a series of local energy dissipation. The interfacial shear stress (IFSS) can be affected by the stress distribution and stress concentration. Fiber fracture leads to stress transfer to the vicinity fibers immediately. To measure the effect of stress transfer, 3D-hexagonal glass fiber/epoxy composites were prepared well, and the inter-fiber distances were controlled precisely. The inter-fiber distances were adjusted with 150 ㎛, 300 ㎛ and 600 ㎛, respectively. The changes of IFSS and debonded length between hexagonal fiber and matrix were measured using the tensile fragmentation method. The specimens of the inter-fiber distance of 150 ㎛ and 300 ㎛ were affected by each fiber fracture, whereas the specimen of 600 ㎛ were almost independent to adjacent center and side fibers. A FEM simulation to clarify the effect of IFSS was investigated using Weibull parameters, especially interfacial sliding resistance and residual stresses of fiber and matrix. IFSS measured by FEM simulation was compared with IFSS measured experimentally by tensile fragmentation. Sliding stress was obtained by pullout tests. Acknowledgement: This study was supported financially by KoSEF through Research Center for Aircraft Parts Technology (ReCAPT), GNU. |
| 저자 | 공진우1, 박종만2, Koichi Goda*3 |
| 소속 | 1경상대, 2항공기부품기술연구센터, 3*Yamaguchi Univ. |
| 키워드 | |
