EngiRef / Mechanical Engineering Formula
Polar Moment of Inertia (Hollow Circle)
Polar Moment of Inertia (Hollow Circle): Polar moment of inertia for hollow circular shaft. A Statics formula in mechanical engineering. Variables J, dₒ and…
Statics
Specification
- Name
- Polar Moment of Inertia (Hollow Circle)
- Discipline
- mechanical
- Category
- Statics
- LaTeX
- J = \frac{\pi (d_o^4 - d_i^4)}{32}
- Description
- Polar moment of inertia for hollow circular shaft
- Can solve for
- J
- Tags
- polar, inertia, hollow, tube
Variables
| Symbol | Name | Unit | Si Unit | Imperial Unit |
|---|---|---|---|---|
| J | Polar Moment of Inertia | m⁴ | m⁴ | in⁴ |
| dₒ | Outer Diameter | m | m | in |
| dᵢ | Inner Diameter | m | m | in |