fatique

1. (MO-091334)
Fatigue & Fracture Mechanics
Fatigue Analysis using
Fracture Mechanic Approach
Prof. Ir. Eko Budi Djatmiko, MSc., PhD.
Nur Syahroni, ST., MT.

2. Fatigue crack propagation test
(MO-091334)
Fatigue & Fracture Mechanics
Small & medium scale Large scale specimen 2
specimen

3. Fatigue crack propagation test
Fatigue & Fracture Mechanics
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4. •
Fatigue crack behavior
Fatigue & Fracture Mechanics
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5. Region I: fatigue threshold
ΔKth can be predicted:
• R≤0.1:
• ΔKth = 6.4(1-0.85R) ksi in1/2
• ΔKth = 7(1-0.85R) MPa m1/2
(MO-091334)
Fatigue & Fracture Mechanics
• R>0.1
• ΔKth = 55 ksi in1/2 =6 MPa m1/2
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6. •
Region II: Stable FCP
Fatigue & Fracture Mechanics
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7. •
Region II: Stable FCP
Fatigue & Fracture Mechanics
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8. •
Region II: Stable FCP
Fatigue & Fracture Mechanics
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9. Effect of mean stress or stress ratio
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Fatigue & Fracture Mechanics
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10. Design example
Fatigue & Fracture Mechanics
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11. Design example
Fatigue & Fracture Mechanics
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12. Design example
Fatigue & Fracture Mechanics
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13. Design example
Fatigue & Fracture Mechanics
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14. Design example
Fatigue & Fracture Mechanics
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15. Design example
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16. Design example
Fatigue & Fracture Mechanics
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17. Design example
Fatigue & Fracture Mechanics
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