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Structural Element
Linked via "polar moment of inertia"
Torsion Members (Shafts): Elements subjected to twisting moments. Torsional stress ($\tau$) in a circular member is calculated as:
$$\tau = \frac{Tr}{J}$$
where $T$ is the applied torque ($T$), $r$ is the radial distance from the centroidal axis, and $J$ is the polar moment of inertia.
Geometric Archetypes