INARA provides an analytical crack propagation model for a broad range of applications (e.g. damage tolerant design or predictive maintenance of railway axles).

INARA was developed

  • to predict fatigue crack growth in railway axles
    • that are originating from a semi-elliptical crack
    • on the basis of fracture mechanics concepts in Mode I loading conditions
  • to predict the growth of fatigue cracks under loads which are defined by the user and which may be imported from other sources, e.g.
    • 2D stress distribution in a railway axle cross section, predicted with FEM software packages
  • to predict the growth of fatigue cracks under influence of residual stresses
    • that can be defined axisymmetrically
  • to predict the growth of fatigue cracks on basis of the MCL-short crack model
    • on basis of experimentally determined fatigue crack growth parameters
    • by considering load sequence effects (optionally) and
    • by considering short crack growth behaviour
  • to predict numbers of cycles for reaching a predefined critical crack length