Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Fatigue Analysis

Failure under repeated or varying load WHICH is never sufficient to cause failure in a single application
Assessing fatigue damage of complicated structural shape is difficult

  • Difficulty in determining stress variation when the stress flow changes directions abruptly

Three ways to deal :

  • Modeling in finite elements
  • Using stress concentration factors
    - approach for tubular joints
    - parametric equations developed by authors based on FEM
    - vary with geometry of joint & load application

Fatigue evaluation through

  • Deterministic Fatigue Approach
  • Spectral Analysis Approach