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Removable and permanent connections
Experiment 5 Removable and permanent connections
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Removable connections
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Self tapping screw Drive screw
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Locked screw
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Rivet Fig. 5-16
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P=1 t=0.375 d=0.375
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Symbol of welding (CNS)
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welding
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Stress in a weld joint
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Stress for butt welding
Stress for Tee or Lap welding
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Strength of electrode
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Rivet or Screw jointed structure
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Assume:
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Practice 1 A structure as shown in above figure, find the safety factor is 2, find the bolt grade of design.
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Practice 2 Allowable shear stress in the weld throat is 120MPa. Find the safety factor of this design.
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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
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