torsion - mercer universityfaculty.mercer.edu/jenkins_he/documents/torsionegr232.pdf · torque...
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Torsion
Torque
• Def: Moment along an axle or shaft
• Equilibrium: Torque out = Torque in
Plane sections remain planar in torsion
Side view of a twisted shaft
BEFORE
AFTER TORSION APPLIED
Shear stress is linear with radius
Fundamental Equations
JG
Tl
J
Tr
G
Low Stress at center of shaft is why many shafts are hollow
END
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