1. Removable and permanent connections
Experiment 5
Removable and permanent connections

2. Removable connections

3. Self tapping screw
Drive screw

4. Locked screw

8. Rivet
Fig. 5-16

10. P=1
t=0.375
d=0.375

13. Symbol of welding (CNS)

14. welding

18. Stress in a weld joint

19. Stress for butt welding
Stress for Tee or Lap welding

20. Strength of electrode

24. Rivet or Screw jointed structure

25. Assume:

30. Practice 1
A structure as shown in above figure, find the safety factor is 2, find the bolt grade of design.

31. Practice 2
Allowable shear stress in the weld throat is 120MPa. Find the safety factor of this design.

32. Note: The reliability for C10 is 0. 9
Note: The reliability for C10 is 0.9. a=3 for ball bearing, 10/3 for roller contact bearing