표제지
목차
기호 설명 14
I. 서론 16
II. 이론 해석 19
1. 복합재 이론 19
2. 충격 해석 시뮬레이션 프로그램 24
III. 모델링 및 시뮬레이션 36
1. 모델링(Modeling) 36
2. 시뮬레이션(Simulation) 37
1) 복합재의 적층 형태 변화 38
2) 복합재의 기하학적 변화 38
3) 외부 물체(강구)의 충격 속도 변화 38
IV. 검토 및 고찰 81
1. 복합재의 적층형태 변화 81
2. 복합재의 기하학적 변화 84
3. 외부 물체(강구)의 충격 속도 변화 86
V. 결론 88
참고문헌 89
Abstract 90
감사의 글 91
Table 1. Material properties of the composite materials and steel ball 36
Table 2. Specification for the simulation 37
Table 3. Results of impact simulation according to changes of shape dimension and impact velocity in laminated composite materials 82
Fig. 1. Reference coordinates for lamina and laminate 20
Fig. 2. Central transverse impact of a rigid body 32
Fig. 3. Flow diagram for impact analysis of laminated composite materials 35
Fig. 4. Contact force and indentation for a [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 39
Fig. 5. Displacements for a ball subjected to impact (Thickness=3.0mm, Length=150mm) 39
Fig. 6. Deflections for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 40
Fig. 7. Indentation for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 40
Fig. 8. Strains for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 41
Fig. 9. Stress for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 41
Fig. 10. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=3.0mm, Length=150mm) 42
Fig. 11. Contact force and indentation for a [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 42
Fig. 12. Displacements for a ball subjected to impact (Thickness=3.0mm, Length=150mm) 43
Fig. 13. Deflections for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 43
Fig. 14. Indentation for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 44
Fig. 15. Strains for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 44
Fig. 16. Stress for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 45
Fig. 17. Displacement profiles of [0°/30°/0°/30°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=3.0mm, Length=150mm) 45
Fig. 18. Contact force and indentation for a [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 46
Fig. 19. Displacements for a ball subjected to impact (Thickness=3.0mm, Length=150mm) 46
Fig. 20. Deflections for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 47
Fig. 21. Indentation for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 47
Fig. 22. Strains for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 48
Fig. 23. Stress for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=150mm) 48
Fig. 24. Displacement profiles of [90°/60°/0°/60°/90°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=3.0mm, Length=150mm) 49
Fig. 25. Contact force and indentation for a [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 49
Fig. 26. Displacements for a ball subjected to impact (Thickness=3.0mm, Length=300mm) 50
Fig. 27. Deflections for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 50
Fig. 28. Indentation for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 51
Fig. 29. Strains for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 51
Fig. 30. Stress for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 52
Fig. 31. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=3.0mm, Length=300mm) 52
Fig. 32. Contact force and indentation for a [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 53
Fig. 33. Displacements for a ball subjected to impact (Thickness=1.5mm, Length=150mm) 53
Fig. 34. Deflections for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 54
Fig. 35. Indentation for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 54
Fig. 36. Strains for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 55
Fig. 37. Stress for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 55
Fig. 38. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=1.5mm, Length=150mm) 56
Fig. 39. Contact force and indentation for a [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 56
Fig. 40. Displacements for a ball subjected to impact (Thickness=3.0mm, Length=300mm) 57
Fig. 41. Deflections for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 57
Fig. 42. Indentation for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 58
Fig. 43. Strains for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 58
Fig. 44. Stress for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 59
Fig. 45. Displacement profiles of [0°/30°/0°/30°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=3.0mm, Length=300mm) 59
Fig. 46. Contact force and indentation for a [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 60
Fig. 47. Displacements for a ball subjected to impact (Thickness=1.5mm, Length=150mm) 60
Fig. 48. Deflections for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 61
Fig. 49. Indentation for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 61
Fig. 50. Strains for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 62
Fig. 51. Stress for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 62
Fig. 52. Displacement profiles of [0°/30°/0°/30°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=1.5mm, Length=150mm) 63
Fig. 53. Contact force and indentation for a [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 63
Fig. 54. Displacements for a ball subjected to impact (Thickness=3.0mm, Length=300mm) 64
Fig. 55. Deflections for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 64
Fig. 56. Indentation for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 65
Fig. 57. Strains for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 65
Fig. 58. Stress for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=3.0mm, Length=300mm) 66
Fig. 59. Displacement profiles of [90°/60°/0°/60°/90°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=3.0mm, Length=300mm) 66
Fig. 60. Contact force and indentation for a [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 67
Fig. 61. Displacements for a ball subjected to impact (Thickness=1.5mm, Length=150mm) 67
Fig. 62. Deflections for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 68
Fig. 63. Indentation for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 68
Fig. 64. Strains for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 69
Fig. 65. Stress for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 69
Fig. 66. Displacement profiles of [90°/60°/0°/60°/90°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=1.5mm, Length=150mm) 70
Fig. 67. Contact force and indentation for a [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 70
Fig. 68. Displacements for a ball subjected to impact (Thickness=1.5mm, Length=150mm) 71
Fig. 69. Deflections for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 71
Fig. 70. Indentation for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 72
Fig. 71. Strains for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 72
Fig. 72. Stress for [0°/0°/0°/0°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 73
Fig. 73. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=1.5mm, Length=150mm) 73
Fig. 74. Contact force and indentation for a [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 74
Fig. 75. Displacements for a ball subjected to impact (Thickness=1.5mm, Length=150mm) 74
Fig. 76. Deflections for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 75
Fig. 77. Indentation for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 75
Fig. 78. Strains for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 76
Fig. 79. Stress for [0°/30°/0°/30°/0°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 76
Fig. 80. Displacement profiles of [0°/30°/0°/30°/0°]s glass/epoxy beam at various times (Velocity=5m/sec, Thickness=1.5mm, Length=150mm) 77
Fig. 81. Contact force and indentation for a [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 77
Fig. 82. Displacements for a ball subjected to impact (Thickness=1.5mm, Length=150mm) 78
Fig. 83. Deflections for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 78
Fig. 84. Indentation for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 79
Fig. 85. Strains for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 79
Fig. 86. Stress for [90°/60°/0°/60°/90°]s glass/epoxy beam subjected to impact (Thickness=1.5mm, Length=150mm) 80
Fig. 87. Displacement profiles of [90°/60°/0°/60°/90°]s glasse/epoxy beam at various times (Velocity=5m/sec, Thickness=1.5mm, Length=150mm) 80
Fig. 88. Contact force for glass/epoxy laminates subjected to impact (Length=150mm, Width=15mm, Velocity=3.0m/sec) 83
Fig. 89. Displacement profiles of glass/epoxy laminates at 120μsec (Length=150mm, Width=15mm, Velocity=3.0m/sec) 83
Fig. 90. Contact force for a [0°/0°/0°/0°/0°]s glass/epoxy laminates subjected to impact (Width=15mm, Velocity=3.0m/sec) 84
Fig. 91. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy laminates at 120μsec (Width=15mm, Velocity=3.0m/sec) 85
Fig. 92. Contact force for a [0°/0°/0°/0°/0°]s glass/epoxy laminates subjected to impact (Length=150mm, Velocity=3.0m/sec) 85
Fig. 93. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy laminates at 120μsec (Length=15mm, Velocity=3.0m/sec) 86
Fig. 94. Contact force for a [0°/0°/0°/0°/0°]s glass/epoxy laminates subjected to impact (Length=150mm, Width=15mm) 86
Fig. 95. Displacement profiles of [0°/0°/0°/0°/0°]s glass/epoxy laminates subjected at 120μsec (Length=150mm, Width=15mm) 87