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Module

Rate, stress, solid height and fatigue screening

Standards catalog

Validation: indicative · Method band: formula

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Indicative method: Indicative closed-form or numerical model

Assumptions

  • Linear elastic material behavior unless noted otherwise.
  • User is responsible for load combinations and load factors per the selected design code.

Limitations

  • Does not replace a licensed professional engineer or official code compliance review.

Engineering checks

CheckINDUSEUISO
Shear stress utilizationimplementedimplementedimplemented—
Solid height marginimplemented———

Module (compression-springs)

Helical compression: spring rate $k = G d^4 / (8 D^3 n)$, Wahl shear factor $K_s = (4C-1)/(4C-4) + 0.615/C$ with $C = D/d$, shear stress $\tau = 8 F D K_s / (\pi d^3)$, solid height $\approx n d + 2d$.

Maintainer note: Helical spring rate and stress.