Calcolatrice Momento d'Area Gratuita
Calcola il secondo momento d'area (momento d'inerzia) di una sezione.
mm
mm
Ixx (about horizontal axis)
66,666,667 mm^4
Iyy (about vertical axis)16,666,667 mm^4
Ixx in cm^46,666.67 cm^4
Ixx (about horizontal axis) vs Width (b)
Formula
## Second Moment of Area for a Rectangle The second moment of area (often called moment of inertia of the cross-section) governs how a beam resists bending. ### Formula **Ixx = b h^3 / 12** **Iyy = h b^3 / 12** where b is the width and h is the height of the rectangle. The axis with the larger I value provides greater bending resistance. That is why beams are oriented with the taller dimension vertical.
Esempio Risolto
A rectangular timber section 100 mm wide and 200 mm tall.
- 01Ixx = 100 x 200^3 / 12 = 100 x 8,000,000 / 12 = 66,666,667 mm^4
- 02Iyy = 200 x 100^3 / 12 = 200 x 1,000,000 / 12 = 16,666,667 mm^4
- 03Ixx in cm^4 = 66,666,667 / 10,000 = 6,666.67 cm^4