P

Documentation/Modules/6.5 Fatigue Assessment

6.5 Fatigue Assessment

Estimate life with S-N curves and load cycles

Standards catalog

Validation: indicative · Method band: advanced-numerics

Open calculator

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
Modified Goodman utilizationimplemented———
Estimated fatigue lifeimplemented———

6.5 Fatigue Assessment (fatigue)

Purpose: High-cycle fatigue screening with modified Goodman and S–N estimate.

Method: Empirical

\sigma_a \le S_e \left(1 - \frac{\sigma_m}{\sigma_u}\right), \quad N \propto \left(\frac{S_e}{\sigma_a}\right)^3 $$[^iso-12107-asme-viii-2-referenced-indicative-good] **Design codes:** ISO 12107, ASME VIII-2 referenced; indicative Goodman and life checks. **UI:** Legacy layout; extracted monolith; `CalculatorResultsShell` style results. **Gaps:** Single-stage Goodman; no mean-stress corrections (Gerber, Morrow), notch factors, or multiaxial fatigue; **advanced-numerics**. --- [^iso-12107-asme-viii-2-referenced-indicative-good]: ISO 12107, ASME VIII-2 referenced; indicative Goodman and life checks.
Maintainer note: Cycle-life models and assumptions require careful migration.