A solid circular bar of diameter $d = 50mm$
is twisted in a testing machine until the
applied toque reaches the value $T = 500 N \cdot m$. At this value, a strain gage
oriented at $45^\circ$ to the axis of the bar gives
a reading of $\epsilon = 339 \times 10^{-6}$. What is the
shear modulus of the material?
Strain gage
$d = 50 mm$
$T = 500 N \cdot m$
$T$
$45^\circ$