3TorsionTorsional DeformationsProblem 3.2-1A copper rod of length L±18.0 in. is to be twisted by torques T(see figure) until the angle of rotation between the ends of the rod is 3.0°.If the allowable shear strain in the copper is 0.0006 rad, what isthe maximum permissible diameter of the rod?Solution 3.2-1Copper rod in torsionL±18.0 in.²allow±0.0006 radFind dmax±0.05236 rad f±3.0°±(3.0)ap180bradFrom Eq. (3-3):;dmax±0.413 in.dmax±2L²allowf±(2)(18.0 in.)(0.0006 rad)
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