A thinwalled closed tube has the crosssection shown The midl

A thin-walled closed tube has the cross-section shown. The midline is a circle of radius R. The wall thickness varies linearly with theta from t = t0 at theta = 0 to t = 3t0 at theta = pi. Find the torsional stiffness, T/theta using Bredt\'s formula.

Solution

A thin-walled closed tube has the cross-section shown. The midline is a circle of radius R. The wall thickness varies linearly with theta from t = t0 at theta = 0 to t = 3t0 at theta = pi. Find the torsional stiffness, T/theta using Bredt\'s formula.