# Fatigue Dt

> Specialized skill for fatigue life prediction and damage tolerance assessment

- Skill: `a5c-ai/fatigue-dt` (Agent Skill)
- Install (CLI): `npx skillmds@latest add a5c-ai/fatigue-dt`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/fatigue-dt/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/fatigue-dt

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# Fatigue and Damage Tolerance Skill

## Purpose
Provide specialized fatigue life prediction and damage tolerance assessment capabilities for airworthiness certification and structural integrity management.

## Capabilities
- S-N and strain-life analysis
- Crack growth analysis (NASGRO, AFGROW)
- Inspection interval determination
- Damage tolerance substantiation
- Spectrum loading analysis
- Mean stress correction methods
- Multi-site damage assessment
- Certification evidence generation

## Usage Guidelines
- Use appropriate fatigue methodology based on structural criticality
- Select material data from qualified sources (MMPDS, ESDU)
- Apply appropriate scatter factors per regulatory requirements
- Consider environmental effects on fatigue and crack growth
- Define inspection intervals with adequate safety margins
- Document all assumptions and conservatisms in certification reports

## Dependencies
- NASGRO
- AFGROW
- Fe-Safe
- nCode DesignLife

## Process Integration
- AE-008: Fatigue and Damage Tolerance
- AE-021: Certification Planning