Question

In: Mechanical Engineering

Design a straight ended helical torsion spring for a static load 200 N-m at a deflection...

Design a straight ended helical torsion spring for a static load 200 N-m at a deflection of 45 deg with a safety factor of 1.8. Specify all parameters necessart to manufacture the spring state all assumntions. You make the following design choices:

*Use unpeened oil tempered wire with 40mm long, straight ends. The coil is loaded to close it

* Design safety factory Nyd=1.8

*spring index C=11

*Yield Strength Factor K=0.85

*length of the ends L1=40 mm=L2

*Material choice = ASTMA299wire

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