Question

what is twisting couple?

Answer 1

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TWISTING COUPLE [on cylinder]

✴ The twisting of a structural member about its longitudinal axis by two equal and opposite torques is expressed through a certain angle. The stress seen in this situation is not tensile or compressive, it is said to be shearing or shear stress.


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Answer 2

Torsional rigidity is also known as the twisting couple per unit twist. As the name suggests it is the amount of twisting couple or torque required to twist the object by one unit angle, i.e., one radian.