Find the torsional yield and ultimate shear strength of an 0

Find the torsional yield and ultimate shear strength of an 0.105 in diameter, unset A230 wire to be used in a helical compression spring.

Solution

For the given wire diameter, we can use the specifications of Music wire ASTM A228.

Find the ultimate tensile strength using

S_ut=Ad^m =201 x (0.105)^0.145 = 144.966 psi

Ultimate Shear Strength

S_us=0.67 x S_ut = 0.67 x 144.966=97.12722 psi

Torsional Yield Strength

S_yt = 0.60 x S_ut =0.60 x (144.966)=86.9796 psi