μm⁴
micrometer to the fourth
Area moment of inertiaexact by definition
The micrometre to the fourth is 10⁻²⁴ m⁴, exact by prefix. It is the working unit of microelectromechanical design, where a silicon cantilever a few micrometres thick has a second moment of area of a handful of μm⁴ and that number sets its stiffness and resonant frequency.
| 1 μm⁴ | 1.0000000e-12 mm⁴ |
Solvers that use area moment of inertia