표제지
목차
ABSTRACT 12
I. 서론 14
1.1. 연구 배경 14
1.2. 연구 목적 및 범위 18
II. 실험 방법 20
2.1. 시편 제작 20
2.1.1. 섬유방향 인장시험 시편의 모재 제작 21
2.1.2. 섬유방향 인장시험 시편 준비 24
2.1.3. 기지방향 인장시험 시편의 모재 제작 26
2.1.4. 기지방향 인장시험 시편 준비 28
2.1.5. 섬유방향 전단시험 시편의 모재 제작 30
2.1.6. 섬유방향 전단시험 시편 준비 31
2.1.7. UPN-139와 USN-125 복합재 특성 비교 33
2.2/2.1. 시험 장치 및 조건 34
2.2.1. 염수 환경 34
2.2.2. 시편의 수분함유량 35
2.2.3. 인장시험 장치 36
2.2.4. 전단시험 장치 37
2.2.5. 변형률 측정 장치 38
III. 실험 결과 및 검토 39
3.1. 섬유방향 인장시험 39
3.1.1. 침수 전 섬유방향 인장시험 39
3.1.2. 1개월 침수 섬유방향 인장시험 42
3.1.3. 3개월 침수 섬유방향 인장시험 44
3.1.4. 6개월 침수 섬유방향 인장시험 46
3.1.5. 9개월 침수 섬유방향 인장시험 48
3.1.6. 12개월 침수 섬유방향 인장시험 50
3.1.7. 섬유방향 인장시험 물성치 비교 52
3.2. 기지(Matrix)방향 인장시험 55
3.2.1. 침수 전 기지방향 인장시험 55
3.2.2. 1개월 침수 기지방향 인장시험 58
3.2.3 .3개월 침수 기지방향 인장시험 60
3.2.4. 6개월 침수 기지방향 인장시험 62
3.2.5. 9개월 침수 기지방향 인장시험 64
3.2.6. 12개월 침수 기지방향 인장시험 66
3.2.7. 기지방향 인장시험 물성치 비교 68
3.3. 섬유방향 전단시험 71
3.3.1. 침수전 섬유방향 전단시험 71
3.3.2. 1개월 침수 섬유방향 전단시험 74
3.3.3. 3개월 침수 섬유방향 전단시험 76
3.3.4. 6개월 침수 섬유방향 전단시험 78
3.3.5. 9개월 침수 섬유방향 전단시험 80
3.3.6. 12개월 침수 섬유방향 전단시험 82
3.3.7. 섬유방향 전단시험 물성치 비교 84
IV. 결론 87
참고문헌 89
감사의 글 91
Table 2-1. Fabric Composite specimens used for this study 20
Table 2-2. The characterization of UPN-139 and USN-125 composite material 33
Table 2-3. The moisture absorption rate 35
Table 3-1. Dimensions of tension test specimen before immersion 39
Table 3-2. Result of fiber direction tension test before immersion 41
Table 3-3. Dimensions of tension test specimen for 1 month immersion 42
Table 3-4. Result of fiber direction tension test for 1 month immersion 43
Table 3-5. Dimensions of tension test specimen for 3 month immersion 44
Table 3-6. Result of fiber direction tension test for 3 month immersion 45
Table 3-7. Dimensions of tension test specimen for 6 month immersion 46
Table 3-8. Result of fiber direction tension test for 6 month immersion 47
Table 3-9. Dimensions of tension test specimen for 9 month immersion 48
Table 3-10. Result of fiber direction tension test for 9 month immersion 49
Table 3-11. Dimensions of tension test specimen for 12 months immersion 50
Table 3-12. Result of fiber direction tension test for 12 months immersion 51
Table 3-13. Dimensions of tension test specimen before immersion 55
Table 3-14. Test result of matrix direction specimen before immersion 57
Table 3-15. Dimensions of tension test specimen for 1 month immersion 58
Table 3-16. Test result of 1 month matrix direction specimen 59
Table 3-17. Dimensions of tension test specimen for 3 months immersion 60
Table 3-18. Test reslut of 3 months matrix direction specimen 61
Table 3-19. Dimensions of tension test specimen for 6 months immersion 62
Table 3-20. Test result of 6 months matrix direction specimen 63
Table 3-21. Dimensions of tension test specimen for 9 months immersion 64
Table 3-22. Test result of 9 months matrix direction specimen 65
Table 3-23. Dimensions of tension test specimen for 12 months immersion 66
Table 3-24. Test reslut of 12 months matrix direction specimen 67
Table 3-25. Dimensions of Shear test specimen before immersion 71
Table 3-26. Result of Shear test before immersion 73
Table 3-27. Dimensions of Shear test specimen for 1 month immersion 74
Table 3-28. Result of Shear test for 1 month immersion 75
Table 3-29. Dimensions of Shear test specimen for 3 months immersion 76
Table 3-30. Result of Shear test for 3 months immersion 77
Table 3-31. Dimensions of Shear test specimen for 6 months immersion 78
Table 3-32. Result of Shear test for 6 months immersion 79
Table 3-33. Dimensions of Shear test specimen for 9 months immersion 80
Table 3-34. Result of Shear test for 9 months immersion 81
Table 3-35. Dimensions of Shear test specimen for 12 months immersion 82
Table 3-36. Result of Shear test for 12 months immersion 83
Fig. 2-1. Set-up for curing 21
Fig. 2-2. Cure cycle for composite materials 22
Fig. 2-3. Fiber direction laminate after curing with Tab 22
Fig. 2-4. Autoclave 23
Fig. 2-5. Dimension of fiber direction tension test specimen 24
Fig. 2-6. Fiber direction tension test specimen 25
Fig. 2-7. Fiber direction tension test specimen with sealing tape 25
Fig. 2-8. Fiber direction tension test specimen with sensor 25
Fig. 2-9. Sensor (Strain gauge) 25
Fig. 2-10. Matrix direction laminate after curing with tab 27
Fig. 2-11. Dimension of matrix(matirx) direction tension test specimen 28
Fig. 2-12. Matrix direction tension test specimen 29
Fig. 2-13. Matrix direction tension test specimen with sealing tap 29
Fig. 2-14. Matrix direction tension test specimen with sensor 29
Fig. 2-15. Fiber direction laminate for shear test after curing 30
Fig. 2-16. Dimension of fiber direction shear test specimen 31
Fig. 2-17. Fiber direction shear test specimen 32
Fig. 2-18. Fiber direction shear test specimen with sensor 32
Fig. 2-19. Machine for notch generation 32
Fig. 2-20. Sensor for shear test 32
Fig. 2-21. Glass container for immersion of test specimen 34
Fig. 2-22. Equipment for tension and shear loading 36
Fig. 2-23. Special test fixture for shear test 37
Fig. 2-24. Amplifier and AD convert for measuring strain 38
Fig. 3-1. Failure modes of fiber direction tensile test 40
Fig. 3-2. Stain-Stress curve of fiber direction tension test before immersion 41
Fig. 3-3. Strain-Stress curve of fiber direction tension test for 1 month immersion 43
Fig. 3-4. Strain-Stress curve of fiber direction tension test for 3 months immersion 45
Fig. 3-5. Strain-Stress curve of fiber direction tension test for 6 months immersion 47
Fig. 3-6. Strain-Stress curve of fiber direction tension test for 9 months immersion 49
Fig. 3-7. Strain-Stress curve of fiber direction tension test for 12 months immersion 51
Fig. 3-8. Strength of fiber direction as immersion time 53
Fig. 3-9. Elastic modulus of fiber direction as immersion time 53
Fig. 3-10. Strength of fiber direction(USN-125) as immersion time 54
Fig. 3-11. Elastic modulus of fiber direction(USN-125) as immersion time 54
Fig. 3-12. Failure modes of matrix direction tensile test 56
Fig. 3-13. Strain-Stress curve of matrix direction tension test before immersion 57
Fig. 3-14. Strain-Stress curve of matrix direction tension test for 1 month immersion 59
Fig. 3-15. Strain-Stress curve of matrix direction tension test for 3 months immersion 61
Fig. 3-16. Strain-Stress curve of matrix direction tension test for 6 months immersion 63
Fig. 3-17. Strain-Stress curve of matrix direction tension test for 9 months immersion 65
Fig. 3-18. Strain-Stress curve of matrix direction tension test for 12 months immersion 67
Fig. 3-19. Strength of matrix direction as immersion time 69
Fig. 3-20. Elastic modulus of matrix direction as immersion time 69
Fig. 3-21. Strength of matrix direction(USN-125) as immersion time(제목없음) 70
Fig. 3-22. Elastic modulus of matrix direction(USN-125) as immersion time 70
Fig. 3-23. Failure modes of finer direction shear test 72
Fig. 3-24. Strain-Stress curve of fiber direction Shear test before immersion 73
Fig. 3-25. Strain-Stress curve of fiber direction Shear test for 1 month immersion 75
Fig. 3-26. Strain-Stress curve of fiber direction Shear test for 3 months immersion 77
Fig. 3-27. Strain-Stress curve of fiber direction Shear test for 6 months immersion 79
Fig. 3-28. Strain-Stress curve of matrix direction Shear test for 9 months immersion 81
Fig. 3-29. Strain-Stress curve of matrix direction Shear test for 12 months immersion 83
Fig. 3-30. Shear strength of fiber direction as immersion time 85
Fig. 3-31. Shear elastic modulus of fiber direction as immersion time 85
Fig. 3-32. Shear strength of fiber direction(USN-125) as immersion time 86
Fig. 3-33. Shear elastic modulus of fiber direction(USN-125) as immersion time 86