Question 16.5: A close coiled spring has a stiffness of 5 N/mm. The solid l...

Strength of Materials

A close coiled spring has a stiffness of 5 N/mm. The solid length of spring is 60 mm when the coils are touching each other. Determine (i) the mean diameter of the coil, and (ii) the diameter of the wire if the maximum load is 100 N corresponding to allowable shearing stress is 150 MPa. Take G = 80 GPa.

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