Twist Loading |
 
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Twist Loading |
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The twist feature allows you to apply a twist load about an element's local axis.
You specify the angle of twist φ in degrees which is to be applied to an element. This can be expressed as a torsional strain εT in radians/metre, taking the element length into account.
(1)
The torque force T induced by the torsional strain is governed by the torsional stiffness GJ.
(2)
If the element is fixed at one end and free to rotate at the other end, the free end will experience a twist equal to φ. If the element is rotationally constrained at both ends, the element will experience a torque force equal to T.
The direction of twist follows a right hand rule with respect to the element convected axis system, so a positive twist tends to rotate the local-y axis towards the local-z axis. A negative twist acts in the opposite direction.
•*TWIST is used to apply a twist load about an element's local axis.