Materials used in ship building

1. Materials used in ship
building
Doctor : Mahmut Savas

2. It is means of public transport humans and cargo above
the water used by human since ancient times to navigate
over water bodies and is a modern trade and transport
columns. Despite the industry of iron Top density of water
and weight and the load of up to tens of thousand of tons,
they float above the surface of the water because of the
momentum generated by the internal spaces of the vessel
filled with air or lighter density of the water liquid, which
makes the relative overall density of the ship less Float
density of water above the water surface

3. Parts of a ship

4. Some of the causes of the sinking of ships
There are two ways of sinking
1- vertical (as happened
with the Titanic)
2- Coup ship (on one side)

5. Material issues relating to construction of
ship
1 - Strength
2 - Weldability
3 - Toughness
4 - Marine Corrosion
5 - Formability
6 -The Cost

6. Strength
There are 3 main types of stress:(Tensile / Tensioning)
– (Compressive / Compression) – (Shear) to handle
both loading scenarios (stiffness and ultimate
strength, based on length)

7. Weldability
Welds in a ship structure are also very critical to its
overall strength, durability, and toughness. Even small
defects in weldments can create the initiation point for
considerably larger cracks and eventual failure

8. Toughness
must be able to deform plastically to some extent, and
tolerate cracks and flaws while maintaining overall
structural integrity

9. Marine Corrosion
There are various materials options, design strategies,
coating, and cathodic protection technologies
available to the designer and shipbuilder

10. Formability
formability of the grade impacts toughness,
weldability, and strength

11. The Cost
Choosing the cheapest material in the construction
phase cannot be a considered a success if the decision
requires a significant increase in construction labor or
creates a maintenance nightmare during the 30 to 50
year

12. The influence of some force ships
0
50
100
150
200
250
300
350
Torsion yield strength Tensile strength
Mpa

13. Neglect the Torsion and yield strength
because the tensile strength greater

14. Now I will choose the materials of
charts M. F. Ashby For ship

15. Strength Density

16. strong plates)ρ/1/2^use Line ( σf

17. I know that tensile strength over (340 Mpa).

18. Candidate Materials :
CFRP
Steels
Ti alloys
Al alloys
Ceremics
•are quite light and very stiff but their poor tensile
strength

19. Strength of materials
0
200
400
600
800
1000
1200
CFRP Steel Ti Alloys AL Alloys
Mpa

20. StrengthYoung Modulus

21. use Line (σf^2/E) elastic energy
storage per unit volume

22. tensile strength over (340 Mpa)

23. Candidate Materials :
CFRP
Steels
Ti alloys
Al alloys

24. Young Modulus of material
0
50
100
150
200
Gpa
CFRP
Steels
Ti Alloys
Al Alloys

25. StrengthFracture Toughness

26. Leak before breakuse Line (Kc^2/σf)

27. tensile strength over (340 Mpa)

28. Candidate Materials :
CFRP
Steels
Ti alloys
Al alloys

29. Fracture Toughness of material
0
20
40
60
80
100
120
CFRP
Steels
Ti Alloys
Al Alloys
Mpa

30. Strength Relative Cost

31. tensile strength over (340 Mpa)

32. Cost of materials
0
100
200
300
400
500
600
CFRP
Steels
Ti Alloys
Al Alloys

33. Table Comparison of material is
best to choose
CostKEσComparison
600701801100CFRP
501102001200Steels
305069700Al alloy
3001021031000Ti alloy

34. The best metal for ships is steel

35. Any Questions

36. Thank you and
have a great day
everyone!