abaqus-script-control-fatigue

name	abaqus-script-control-fatigue
description	Abaqus fatigue analysis — high-cycle fatigue (S-N curve) and low-cycle fatigue life prediction under cyclic loading.
version	1.0
capabilities	["high_cycle_fatigue","low_cycle_fatigue","sn_curve_life_prediction","damage_accumulation"]
triggers	["fatigue analysis","fatigue life","S-N curve","cyclic loading","high-cycle fatigue","low-cycle fatigue","疲劳分析","疲劳寿命"]
constraints	["Requires general/SKILL.md and static/SKILL.md as foundation","Reference documentation is currently limited — expand for production use","Fatigue analysis requires material S-N curve data"]

Abaqus Fatigue Analysis Skills

Overview

This skill module provides specialized skills for Abaqus fatigue analysis, including high-cycle fatigue and low-cycle fatigue analysis. Fatigue analysis is used to predict the fatigue life of structures under cyclic loading.

Skills List

1. High-Cycle Fatigue Analysis (skill_fatigue_high_cycle)

High-cycle fatigue life prediction based on S-N curves, applicable for cyclic loads with stress levels below yield strength.

Applicable Scenarios:

• Stress level σ_max < σ_y (yield strength)
• Number of cycles N > 10^4 ~ 10^6
• Fatigue problems dominated by elastic deformation

Code Snippet:

# S-N curve parameters
Sf_prime = 1000.0    # Fatigue strength coefficient (MPa)
b = -0.085          # Fatigue strength exponent
Se = 200.0          # Fatigue limit (MPa)

# Basquin's equation for life calculation
# S = Sf * (2N)^b
log_2N = (log_S - log_Sf) / b
cycles_to_failure = int(10**log_2N / 2)

---

Quick Reference

S-N Curve Parameters (Typical Values)

Material	Sf' (MPa)	b	Se (MPa)
Steel	1000	-0.085	200
Aluminum Alloy	500	-0.110	150

Influencing Factors

Factor	Effect
Surface Roughness	Reduces fatigue strength
Size Effect	Larger sizes reduce strength
Load Type	Bending > Tension/Compression > Torsion

Detailed Reference

• High-Cycle Fatigue Analysis — S-N curve, mean stress correction, Miner's damage accumulation

Related Skills

• General Skills
• Static Analysis