StructX > Resources > Stress and Strain > Torsion
Assumptions and Limitations
Torsion is a type of loading caused by a twisting action or torque. Its effect on the member is the rotation of parallel cross-sections relative to each other. Several Assumptions have been made.
- Materials are considered to be homogeneous, isotropic and linear-elastic.
- Forces are evenly distributed over the cross-section and act through the centroid.
- Cross-sections are perpendicular to the longitudinal axis of the member.
- Plane sections before deformation remain plane after deformation.
- Stress and strain are linearly related and strains are small.