jasonanewcoder/abaqus_skills/fatigue

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)

Influencing Factors

Detailed Reference

• High-Cycle Fatigue Analysis — S-N curve, mean stress correction, Miner's damage accumulation
• Low-Cycle Fatigue & Strain-Life — Coffin-Manson, cyclic elasto-plastic analysis, fe-safe workflow

Related Skills

• General Skills
• Static Analysis