Torsion
of a Circular Bar
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In a Nutshell: Torsion of circular bars
is restricted to bars with cross-sections that are solid circular sections or
annular sections. |
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Calculation of the polar moment of inertia Recall from calculus that
the polar moment of inertia of a plane circular section is
The two cross-sections of
key interest are a circular cross-section or radius, c, and an annular cross-section with outer
radius c2 and inner radius c1. The table below gives the polar moment of inertia
for these two cross-sections.
The distribution of shear
stress is linear for linear-elastic material response. (Figures below) Click here to return to
torsion members. |
| Return to Notes on Solid Mechanics |
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