GF/PP 복합재료의 충격거동에 관한 연구 발 표 자 엄 윤성

열가소성 복합재료에 영향을 미치는 인자 열경화성 복합재료 섬유강화 복합재료 열가소성 복합재료 강화섬유 Injection Molding 열가소성 복합재료 열가소성수지 섬유함유율 열가소성 복합재료에 영향을 미치는 인자 환경적 요인 온도변화의 영향 충격강도에 대한 종래의 연구 섬유함유율의 영향 충격파면의 영향

본 연구 Impact test 결 론 실온 0oC -25oC -50oC GIC 파면해석 섬유함유율 0% 섬유함유율 1 0% 20% 섬유함유율 3 0% 실온 0oC -25oC -50oC Impact test GIC 파면해석 결 론

실험방법 섬유함유율 0% 섬유함유율 10% 실험재료 섬유함유율 20% 섬유함유율 30% 실온 0oC 온도변화 Fig.1 Specimen geometries for Charphy impact. 0oC 온도변화 알코올 + 액체질소 -25oC -50oC

임계 파괴에너지

실온시 섬유함유율의 변화 Fig.2 GIC vs uncracked ligament, W-a of various glass fiber volume fraction.

온도의 변화 Fig.3 GIC vs uncracked ligament, W-a of 0% fiber volume fraction at various temperature. Fig.4 GIC vs uncracked ligament, W-a of 10% fiber volume fraction at various temperature.

온도의 변화 Fig.5 GIC vs uncracked ligament, W-a of 20% fiber volume fraction at various temperature. Fig.6 GIC vs uncracked ligament, W-a of 30% fiber volume fraction at various temperature.

섬유함유율 변화 Fig.7 U vs a function of BWF for various fiber volume fraction at room temperature. Fig.8 U vs a function of BWF for various fiber volume fraction at 0oC.

섬유함유율 변화 Fig.9 U vs a function of BWF for various fiber volume fraction at -25oC. Fig.10 U vs a function of BWF for various fiber volume fraction at -50oC.

실온강도 실온강도 Fig.11 GIC vs fiber volume fraction at various temperature.

GIC 비교 Table.1 Critical potential energy release rate GIC by U/B(W-a) unit : kJ/m2 . Table.2 Critical potential energy release rate GIC by Williams et al. Method unit : kJ/m2.

파면해석 10% room temperature Fig.12 SEM photographs of impact fracture surface for various fiber fraction GF/PP tested at room temperature.

파면해석 20% room temperature Fig.13 SEM photographs of impact fracture surface for various fiber fraction GF/PP tested at room temperature.

파면해석 30% room temperature Fig.14 SEM photographs of impact fracture surface for various fiber fraction GF/PP tested at room temperature.

파면해석 10% room temperature Fig.15 SEM photographs of impact fracture surface for 10% fiber volume fraction GF/PP tested at variant temperature.

파면해석 10% 0oC Fig.16 SEM photographs of impact fracture surface for 10% fiber volume fraction GF/PP tested at various temperature.

파면해석 10% -25oC Fig.17 SEM photographs of impact fracture surface for 10% fiber volume fraction GF/PP tested at various temperature.

파면해석 10% -50oC Fig.18 SEM photographs of impact fracture surface for 10% fiber volume fraction GF/PP tested at various temperature.

결 론