6.10 Direct cyclic analysis in Abaqus/CAE

Products: Abaqus/Standard Abaqus/CAE

Benefits: You can now define direct cyclic and low-cycle fatigue analysis procedures, as well as solution control parameters to be used in direct cyclic analyses, in Abaqus/CAE. These enhancements increase the coverage of Abaqus analysis product functionality.

Description: Abaqus/CAE now provides support for direct cyclic and low-cycle fatigue analysis procedures in the Step module, as shown in Figure 6–1.

Figure 6–1 Specifying incrementation options for a direct cyclic step.

A direct cyclic procedure is a quasi-static analysis that uses a combination of Fourier series and time integration of the nonlinear material behavior to obtain the stabilized cyclic response of the structure iteratively. The basis of this method is to construct a displacement function

that describes the response of the structure at all times t during a load cycle with period T. A direct cyclic procedure avoids the considerable numerical expense associated with a transient analysis.

In addition, you can specify general solution controls for direct cyclic procedures and restart an analysis from a previous direct cyclic analysis in Abaqus/CAE.

Abaqus/CAE Usage:

Step module
   Create Step: General: Direct cyclic
   Create Step: General: Direct cyclic; Fatigue: Include low-cycle fatigue analysis
All modules
   ModelEdit Attributesmodel-name: Restart: toggle on Read data from job

References:

Abaqus Analysis User's Manual

Abaqus/CAE User's Manual

Abaqus Keywords Reference Manual