Mechanical / 06
Shaft Torsional Stress Calculator
Calculate maximum torsional shear stress in MPa for a solid round shaft.
How it works
τ = 16T / (π(d/1000)³) / 10⁶
A solid 20 mm shaft carrying 36.22 N·m has maximum torsional shear stress of 23.06 MPa.
FAQ
Does this apply to hollow shafts?
No. The formula uses the polar section properties of a solid circular shaft.
Does this include bending?
No. It calculates torsional shear stress only.
Does a result below yield prove safety?
No. Material strength, fatigue, stress concentrations, and required design factors need separate assessment.