Torsion in Structural Design - Notes 11/30/01

5

Out of plane distortion (warping) of the section is assumed to vary with the rate of twist

dx

xd )(φ=θ =constant θ=φ→ xx)(

and to be a function of the position (y,z) on the cross-section only. Several models may be constructed

• Warping function model.

• Conjugate Harmonic function model

• St Venant's stress function model