iowarp/fatigue
Fatigue and failure method: regime and mechanism, high-cycle and multiaxial fatigue, critical-plane (Fatemi-Socie) and defect-driven life prediction, fracture mechanics and crack initiation, with the fatigue_failure_expert subagent.
Determine whether initiation is surface- or defect-driven and at which specific site, since the mechanism determines which mitigation is actually effective.
Connect a measured defect's size and location to the local stress state at that exact location, and use a defect-size-based life model rather than a smooth-specimen S-N curve.
Compute and interpret the Fatemi-Socie damage parameter correctly for non-proportional multiaxial fatigue, with its material constant and search procedure stated.
Choose a life-prediction method that matches the regime and loading actually present, and trace every input it consumes back to its source.
Identify the fatigue regime and controlling mechanism before selecting a life-prediction method, since the wrong regime assumption invalidates the method choice.
Apply a stress-intensity or crack-growth approach with the defect geometry, loading, and material toughness stated explicitly, rather than assuming LEFM validity.
Apply an S-N life estimate with its mean-stress correction and fatigue-limit assumption stated explicitly, rather than reading a single curve without qualification.
Detect when a stress state is genuinely multiaxial and non-proportional, and route to a critical-plane or equivalent-stress method capable of handling it.