In: Mechanical Engineering
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