Torsion
of a Circular Bar - Shear Strain
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Example: Torque, T, acts on the
circular shaft shown. The shaft has a material with shearing modulus of
elasticity, G, of 10 x 106 psi. Shaft length, L, is 30 inches. The inner diameter is 10
inches and the outer diameter is 12 inches. T = 20,000 ft lb. Find the shear strain, γ, at the inner surface of the shaft. |
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Strategy: Apply the relationship
between the angle of twist, φ, and the shear strain, γ, in a circular shaft as
shown below. |
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with this example. |
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