TorsionalStress

Torsional loading causes twisting deformations in rod.

As a result, shear stresses appear in cross-section: \[\tau=\frac{T\rho}{J}\]

where:

• T - torque moment
• \(\rho\) - radial location
• J - polar moment of inertia (see Cross-section Properties)

According to the equation above, the most critical stress occurs at the extreme layers of bar

The angle of twist can be found by using: \[\varphi=\frac{TL}{GJ}\]

According to sign convention, positive stress at counter-clockwise direction of torque and negative - at clockwise direction of torque .