Direct cyclic analysis

A direct cyclic analysis:

  • is a quasi-static analysis;

  • uses a combination of Fourier series and time integration of the nonlinear material behavior to obtain the stabilized cyclic response of the structure iteratively;

  • avoids the considerable numerical expense associated with a transient analysis;

  • is ideally suited for very large problems in which many load cycles must be applied to obtain the stabilized response if transient analysis is performed;

  • can be performed with linear or nonlinear material with localized plastic deformation;

  • can be used to predict the likelihood of plastic ratchetting;

  • assumes geometrically linear behavior and fixed contact conditions;

  • uses the elastic stiffness, so the equation system is inverted only once; and

  • can also be used to predict progressive damage and failure for ductile bulk materials and/or to predict delamination/debonding growth at the interfaces in laminated composites in a low-cycle fatigue analysis.

The following topics are discussed:

Related Topics
Defining an analysis
In Other Guides
Configuring a direct cyclic procedure