Tension bar (rod spring)
Cross-section area, tensile stress, axial deflection and stiffness of a cylindrical bar loaded in tension, acting as a simple rod spring.
Cross-section area, A = (π/4)D²0.79 10⁻⁶ m²
Tensile stress, σ = F/A127.32 10⁶ Pa
Deflection, δ = FL/(AE)0.18 10⁻³ m
Stiffness, k = dF/dδ0.55 10⁶ N/m
Method & references
- Cylindrical tension bar acting as a rod spring — axial stress and stiffness.
- The legacy page this was ported from shares its exact page title with four other spring calculators (disc/Belleville washer; torsion bar, solid/hollow; cantilever leaf spring) that are, despite the shared title, genuinely different spring types.
- Disc (Belleville washer) spring (shares this calculator's legacy page title, but a distinct spring type)
- 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)
The computation is a literal port of the original client-side JavaScript from /calculators/t14_10.htm. Results are verified equal to the original by an automated golden-master test. No formula has been re-derived or “improved”.