표제지
초록
Abstract
목차
제1장 서론 13
1.1. 연구 배경 및 개요 13
제2장 복합 재료 15
2.1. 복합 재료의 기계적 특성 15
2.2. 복합 재료의 적층 구조 이론 17
제3장 SPH 기법 연구 20
3.1. 입자 완하 유체 동역학 기법 20
3.2. 입자 완화 유체 동역학 기법 모델 검증 24
제4장 조류 충돌 해석 기법 연구 30
4.1. 조류 충돌 해석 기법 연구 30
4.1.1. 복합재 파손 해석 기법 30
4.1.2. 접합부 파손 해석 기법 34
4.2. 해석모델 구성 및 해석 조건 36
제5장 영향 인자 연구 44
5.1. 조류 절단 메커니즘 44
5.2. 영향 인자 도출 및 해석 46
5.2.1. 블레이드 변형 효과 46
5.2.2. 조류 충돌 위치 49
5.2.3. 조류 직경 52
5.2.4. 블레이드 회전 및 정지 상태 55
제6장 결론 및 향후 계획 61
참고 문헌 63
Table 1. AlCu4Mg1 Property 26
Table 2. SM45C Property 26
Table 3. Gelatine Property 26
Table 4. Hexcel 8552 IM7 Property 40
Table 5. INCONEL 625 Property 41
Table 6. AF 163-2K Property 41
Table 7. Regulation on bird strike test for engine fan / CFR 33.76, 25.571 42
Figure 1. Kernel function 20
Figure 2. Specifications of test specimen 25
Figure 3. Finite element model of test specimen 25
Figure 4. Result of displacement, Spherical bird mode 28
Figure 5. Result of reaction force, Spherical bird model 28
Figure 6. Result of Displacement, Cylindrical bird model 29
Figure 7. Result of reaction force, Cylindrical bird model 29
Figure 8. Stress-displacement relation 31
Figure 9. Cohesive zone model 34
Figure 10. Traction Separation relation 35
Figure 11. Blade finite element model 37
Figure 12. Cohesive zone model 37
Figure 13. 8 nodes, Continuum shell element 38
Figure 14. Bird Solid model and SPH model 39
Figure 15. Blade boundary condition 42
Figure 16. Centrifugal analysis boundary condition and load condition 43
Figure 17. Stress result of centrifugal analysis 43
Figure 18. Rotation blade slicing mechanism 44
Figure 19. Fix blade slicing mechanism 45
Figure 20. Impulsive force and impulse depending on deformation effect 47
Figure 21. Flexible blade matrix tensile, compression failure / Pressure side 47
Figure 22. Flexible blade matrix tensile, compression failure / Suction side 48
Figure 23. Flexible blade fiber tensile, compression failure / Pressure side 48
Figure 24. Flexible blade fiber tensile, compression failure / Suction side 48
Figure 25. Flexible blade cohesive damage 49
Figure 26. Effective volume depending on collision location 49
Figure 27. Impulsive force and impulse depending on collision location 50
Figure 28. Matrix tensile failure depending on collision location / Pressure side 51
Figure 29. Matrix tensile failure depending on collision location / Suction side 51
Figure 30. Cohesive damage depending on collision location / Pressure side 51
Figure 31. Cohesive damage depending on collision location / Suction side 52
Figure 32. Effective volume depending on bird diameter 52
Figure 33. Impulsive force and impulse depending on bird diameter 53
Figure 34. Matrix tensile failure t=0.001 s depending on bird diameter / Pressure side 54
Figure 35. Matrix tensile failure t=0.001 s depending on bird diameter / Suction side 54
Figure 36. 1st, 2nd impact area depending on bird diameter / Pressure side[이미지참조] 55
Figure 37. Rotation, fix blade velocity condition 55
Figure 38. Impulsive force and impulse depending on blade condition 56
Figure 39. Matrix tensile failure depending on blade condition / Pressure side 57
Figure 40. Rotation, fix blade test velocity condition 57
Figure 41. Effective volume for rotation, fix blade 58
Figure 42. Case 01 Impulsive force and impulse depending on blade condition 59
Figure 43. Case 01 Matrix tensile failure depending on blade condition / Pressure side 59
Figure 44. Case 01 Matrix tensile failure depending on blade condition / Suction side 59
Figure 45. Case 02 Impulsive force and impulse depending on blade condition 60
Figure 46. Case 02 Matrix tensile failure depending on blade condition / Pressure side 60
Figure 47. Case 02 Matrix tensile failure depending on blade condition / Suction side 60