Torsion Test

A test where a length of wire is twisted on its own axis in one direction until it breaks to determine the ductility of wire in twisting. Wire undergoing this test must withstand the number of torsions or twists specified for that quality without fracture, splitting or other defect. A form of the test is used to determine modulus of rigidity, yield point and elastic limit stresses in torsion and shear stress. It is also known as the Twisting Test.