Fatigue Life Analysis & S-N Curves

Predict fatigue life using Goodman, Soderberg, and modified Goodman diagrams. Generate S-N curves and calculate endurance limits.

Fatigue Analysis

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Formula

Fatigue — see inputs panel for active relations

This module is fully available. Detailed formula cards are filled in as each solver is polished; results still come from the module engine.

Project standards applySI units preferred

Assumptions & limits

  • Use for preliminary engineering checks
  • Confirm critical decisions against codes, catalogs, and mill data
  • Units and sign conventions must match the input labels
AluCalc 2026-07-12