1. Suppose there a joint where 13 bolts (M14 x 2, ISO 9.8) are on a...

1. Suppose there a joint where 13 bolts (M14 x 2, ISO 9.8) are on a 200 mm bolt circle. The bolts are zinc-plated and installed for permanent installation. The maximum total load is 400,000 N and the minimum load is 100,000 N. The top member of the joint is cast-iron (E = 100,000 MPa) and 20 mm thick, while the bottom member is steel that is 40 mm thick.

e) What is the factor of safety in yield, np?

f) What is the load factor of safety, nL?

g) What is the joint separation factor of safety, nO?

h) What is the fatigue factor of safety, nf?

i) Is this joint safe in both static and fatigue loading?

j) What is the torque required to make up the bolts to the required pre-load, in N-mm?

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Thank you.

samet mamat answered 8 months ago

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