성형조건에 따른 CFRP 복합재료의 휨 거동과 내부구조 변화

다국어 초록 (Multilingual Abstract)

The purpose of this study is to relate flexural behavior and inner
structure of carbon composites with molding conditions. Molding conditions
are hot press, auto-clave, oven, and infusion. In the 3-point bending test,
the specimen treated with auto clave method showed higher flexural stress
compared with hot press method. This result showed putting pressure on
composites with extracting resin is good method.
The morphologies of fracture-section and surface of CFRP were
observed with SEM. The morphologies of specimens with auto clave
method contain more resin than hot press method. This result showed that
resin contents are in inverse proportion to mechanical properties. More
important factor in the mechanical properties is a void content. Auto clave
specimens consist of 44% of resin. But, their inner structure is so
compact. Void volume is important factor with resin content in the
mechanical properties of carbon fiber reinforced plastics.

목차 (Table of Contents)

• 1. 서론 1
• 2. 실험 4
• 2.1 시료 4
• 2.1.1 탄소 직물 4
• 2.1.2 탄소 섬유 Prepreg 5
• 2.1.3 Epoxy 수지 7
• 2.2 실험방법 9
• 2.2.1 성형조건 9
• 2.2.1.1 Hot Press 성형 9
• 2.2.1.2 Auto-Clave 성형 11
• 2.2.1.3 Oven 성형 16
• 2.2.1.4 Infusion 성형 17
• 2.2.2 굴곡특성 20
• 2.2.3 표면 및 단면 관찰 22
• 2.2.4 Resin Content 23
• 3. 결과 및 고찰 25
• 3.1 굴곡특성 25
• 3.2 표면 및 단면 관찰 30
• 3.3 Resin Content 39
• 4. 결론 41
• 참고문헌 43
• Abstract 45