Thermally Induced Creep

Application ID: 207

Creep is an inelastic time-dependent deformation which occurs when a material is subjected to stress at sufficiently high temperature, say 40% of the melting point or more.

Experimental creep data (using constant stress and temperature) often display three different types of behavior for the creep strain rate as function of time:

  • In the initial primary creep regime the creep strain rate decreases with time.
  • In the secondary creep regime the creep strain rate is almost constant.
  • In the final tertiary creep regime the creep strain increases with time until a failure occurs.

This model computes the stress history over a long time for a material that exhibits creep behavior. The model is taken from NAFEMS Understanding Non-Linear Finite Analysis Through Illustrative Benchmarks. The displacement and stress levels are compared with the values given in the reference.

This model example illustrates applications of this type that would nominally be built using the following products: