The section modulus (Z) of a solid circular cross-section of diameter ‘d’ is equal to:
Api * d³ / 16
Bpi * d³ / 32
Cpi * d⁴ / 64
Dpi * d³ / 64
Explanation
Section Modulus Z = I / y_max. For a solid circle, I = pi*d⁴/64 and y_max = d/2, so Z = (pi*d⁴/64) / (d/2) = pi*d³/32.

No Comments