The layer-removal method for determining the residual shear stress destribution in scragged torsion bars is examined.
It is found that thickness of the layer removed is restricted if the ‘mean stress at mean radius’ assumption is to be valid. Also, it is shown that the modulus of rigidity used in the Fuchs-Mattson equation is not the conventionally accepted modulus, the use of which can lead to large errors in the calculation of the residual shear stress in the outer layers of material.
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