… of a body in torsion

… of a body in torsion#

By applying equilibrium to the free-body diagram of a body you can find unknown torsional moment which prevent motion (rotation around own axis). The concept of equilibrium of a torsional body is treated in examples 2 and 4 in chapter 6.4 of the book Engineering Mechanics Volume 2 (Hartsuijker and Welleman, 2007). At maximum one unknown force can be solved for. The steps involved are:

  1. Draw a free body diagram of the body

  2. Split the forces in convenient directions by applying resolution of forces

  3. Solve the torsional moments using \({\left. {\sum T_x } \right|_x} = 0\) for any arbitrary points \(x\).