Disc (Belleville washer) spring
Stress, deflection and stiffness of a Belleville disc spring, from outer/inner diameter, thickness and material properties.
Tensile stress, σ64.44 10⁶ Pa
Spring deflection, f0.02 10⁻³ m
Spring stiffness, k = dF/df = F/f5743.59 10³ N/m
Method & references
- Belleville (disc) washer spring — stress and deflection.
- The legacy page this was ported from shares its exact page title with four other spring calculators (torsion bar, solid/hollow; cantilever leaf spring; tension bar/rod spring) that are, despite the shared title, genuinely different spring types.
- Torsion bar, solid round (shares this calculator's legacy page title, but a distinct spring type)
- Torsion bar, hollow round (shares this calculator's legacy page title, but a distinct spring type)
- Cantilever leaf spring (shares this calculator's legacy page title, but a distinct spring type)
- Tension bar / rod spring (shares this calculator's legacy page title, but a distinct spring type)
The computation is a literal port of the original client-side JavaScript from /calculators/t14_6.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.