Twisting - Notes

Introduction to Twisting

Torsion

Twisting due to an applied torque

Torque(Nm)

A twisting force

Shaft

A long slender structural member subjected to a torque about it’s long axis

Torsional Stress

Torque applied to the end of a shaft

· Shaft twists an angle θ

· θ is a function of shaft length L and stiffness G (shear modulus)

· θ starts at zero and increases linearly as a function of X (as get further from pivot position)

· γ (inner core angle) is constant along length (x)

Stress is at maximum at the Radius (edge of the material)

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