May 20, 2014 · Torsional rigidity is the force limit before a solid deforms or fatigues. In other words, a solid's resistance (elasticity) to radial twisting (torquing). Lateral rigidity is the force limit forces generated along its axis(es). The quantity denotes the torsional rigidity, while the quantity denotes the warping rigidity of the cross section. It is noted that the torsional constant is independent of the position of the coordinate system, while the warping constant refers to the center of twist .
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