Overview

Fatigue is the weakening or failure of a material caused by repeated applied loads. It combines the material’s multiscale internal structures with the cyclic boundary conditions (loads, displacements, etc.) generating ultimate failure. The maximum stress that causes such failure may be much less than the yield or ultimate strength, because of the internal damage progression due to local heterogeneities inducing stress concentrations.

Videos

A short introduction and analize for Fatigue can be found in these videos:

• Fatigue Failure Analysis[1]

Tutorials

• WARP3D Fatigue Analysis Code

Models

• WARP3D Open Source Code for 3D Nonlinear Analysis of Solids
• Microstructure-Sensitive MultiStage Fatigue (MSF) model

MultiStage Fatigue Model

The microstructure-based multistage fatigue (MSF) model of McDowell et al. (McDowell et al., 2003) is an appealing model for prognosis applications, particularly in the HCF regime, since it captures fatigue behavior in the initial stages of crack incubation (formation and growth within the zone of influence of inclusion or defect where formed) and small crack growth, and explicitly addresses the role of microstructure.

Structural Scale

Macroscale

Mesoscale

Microscale

Nanoscale

References