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Question

A square steel bar, 25 mm25 \mathrm{~mm} on a side and 650 mm650 \mathrm{~mm} long, is subjected to a torque of 230 Nm230 \mathrm{~N} \cdot \mathrm{m}. Compute the shear stress and the angle of twist for the bar.

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For noncircular members, the shear stress and the angle of twist are expressed respectively as follows:

τ=TQ\tau=\dfrac{T}{Q}

θ=TLGK\theta=\dfrac{TL}{GK}

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