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The Engineer posted on October 23, 2006 | | 15468 views

The shear stress in beam due to torque can be derived with three principals:
Geometry, Hooke's Law, and Equilibrium.

Circular Members


g = shear strain
f = angle of twist
q = angle of twist / unit length

Hooke's Law:


Relationship between Torque and Shear:
  T = G · q · J
Polar Moment of Area for Circular Shapes:
Angle of Twist:

Circular Shaft:
Hollow Shaft:
Thin Walled Tube: J = 2pr3t