Shear Stress

$\tau =\frac{F}{A}=G\gamma$

• $G$ or sometimes $\mu$ is the shear modulus
• $\gamma$ is the shear strain
  

$\tau =\frac{T\rho }{J}$

• $T$ is the torque applied to a rod
• $\rho$ is the distance from the center of the rod
• $J$ is the polar moment of intertia