Torsional Fixity
Torsional Fixity
(OP)
I'm writing a stiffness matrix program and including fixity numbers for each end of 0 to 1 for both flexure and torsion. (0 = pinned, 1 = fixed)
For flexure it's fairly obvious to me, but for torsion I'm having trouble understanding what the fixity means.
A fixity of 1 means warping constrained, and a fixity of 0 means warping unconstrained, correct?
However, a fixity of 0 will still have the torsional stiffness of GJ/L at 100% (only St. Venant's), correct?
For a ball and socket joint, there would be no torsional stiffness at all. Would this be classified as free rather than pinned?
And, theoretically, couldn't you have a ball and socket joint that restrains warping?
For flexure it's fairly obvious to me, but for torsion I'm having trouble understanding what the fixity means.
A fixity of 1 means warping constrained, and a fixity of 0 means warping unconstrained, correct?
However, a fixity of 0 will still have the torsional stiffness of GJ/L at 100% (only St. Venant's), correct?
For a ball and socket joint, there would be no torsional stiffness at all. Would this be classified as free rather than pinned?
And, theoretically, couldn't you have a ball and socket joint that restrains warping?






RE: Torsional Fixity
RE: Torsional Fixity