Determine nominal bending stress, allowable stress, utilization, and required section modulus.
Set the inputs and run the calculation.
Check elastic nominal stress of a section under uniaxial bending.
Bending moment M, elastic section modulus W, allowable stress and safety factor are entered.
W represents how far load-carrying material lies from the neutral axis. The same moment gives lower edge stress with larger W; local notches can remove that benefit in the real part.
Edge stress is σ = M/W. Required W follows from moment and allowable stress.
10 kNm with W = 50 cm³ gives 200 MPa nominal bending stress.
Sources and limits: Linear beam theory; assess notches, stability, fatigue and combined loading separately.
Bending moment M acts about the centroidal axis. Bending stress is zero at the neutral axis and increases linearly in magnitude to σmax at the extreme fibres. Reversing the moment swaps tension and compression.
Bending moment and elastic section modulus give the maximum nominal stress. This is useful for quickly comparing candidate beam sections.
Valid for linear-elastic uniaxial bending. Notches, fatigue, stability, and combined loading require separate checks.