Unstable collapse and postbuckling analysis

The Riks method:

  • is generally used to predict unstable, geometrically nonlinear collapse of a structure;

  • can include nonlinear materials and boundary conditions;

  • often follows an eigenvalue buckling analysis to provide complete information about a structure's collapse; and

  • can be used to speed convergence of ill-conditioned or snap-through problems that do not exhibit instability.

The following topics are discussed:

Related Topics
Defining an analysis
About static stress analysis procedures
Introducing a geometric imperfection into a model
In Other Guides
Configuring a static, Riks procedure