Bending Stress Calculator — Wx, σ | StrokeForge Engineering

Bending Moment

Applied moment M

Design value M_Ed or characteristic value

Material / yield strength f_y

Width b

mm

Height h

mm

W_x = b · h² / 6

Section modulus W_x

—

Bending stress σ

—

= M / W_x

Yield strength f_y

—

material limit

Utilization η

—

σ / f_y

—

σ / f_y —

⚠ Stress exceeds yield strength — section is overstressed. Increase section size or reduce load.

ℹ Utilization below 30% — section may be oversized. Consider a lighter profile.

Rectangle: b·h² / 6
Circle: π·d³ / 32
Hollow rect: (B·H³−b·h³) / (6·H)
Hollow circ: π·(D⁴−d⁴) / (32·D)

σ = M / W_x
η = σ / f_y ≤ 1.0