2. Failure of Materials in Service

3. What is Failure? How is it defined?

4. Is this failure?

5. What about this?

6. Or this?

7. Familiar Failure Conventional tensile failure mode that we are all familiar with.

8. Brittle Fracture

9. Ductile Fracture

10. Failure in Compression

11. Failure in Torsion

12. Failure in Bending

13. Stiff stuff getting bent!

14. Failure in little bits!

15. Sneaky failure

16. Fatigue Failure

17. Quietly in the hidden places failure

18. You would not be worrying about this failure at the time it occurred!

19. Will you ever fly in a plane again!

20. Bolting the door after the …..

21. Expensive can-opener!

22. A new slant on bird ingestion

23. Where did that runway go?

24. Brake failure or pilot error?

25. Pardon me sir!

26. This was frozen when I took off!

27. A watery grave

28. Why Failure? All unanticipated mechanical failures must have a cause: Designed incorrectly Manufactured incorrectly Mis-maintained Mis-operated

29. Typical modes of failure tensile, compressive & shear bending (buckling) distortion, residual loads. creep (temperature / stress related) thermal shock corrosion (including stress corrosion) ageing wear, fretting fatigue And lastly, cracks in the fuselage!