Products: ABAQUS/Explicit ABAQUS/CAE
Connector failure behavior:
can be defined in any connector with available components of relative motion;
can be used to fail all or specified components of relative motion if a specified criterion is met;
can be triggered if either a connector relative motion or connector force in a specified component is outside a specified range;
can be replaced in most cases by the more sophisticated connector damage initiation/evolution behavior (see “Connector damage behavior,” Section 17.2.7); and
can be used only in ABAQUS/Explicit.
A typical connector might have pieces that break if a relative motion component, force, or moment becomes too large. ABAQUS/Explicit provides a way to define which components of relative motion will break and the criteria used to release these components. You can select the component of relative motion on which the failure criterion is based.
Connector failure can be used to specify connector behavior based on constrained as well as available components of relative motion. Limit values for force or moment can be specified for all components of relative motion involved in the connection. In addition, for connectors with available components of relative motion, limit values can be specified for the relative positions corresponding to an available component.
If the failure criterion specified for the selected component of relative motion is met, either all components of relative motion fail or a single available component fails. By default, all components of relative motion are released upon meeting the failure criterion. In this case the connector element will have no effect on the analysis from that point on. All nodal force contributions from the connector element will be removed during the increment when the failure criterion is met. You can specify if only a selected available component of relative motion is released.
| Input File Usage: | Use the following options to define connector failure: |
*CONNECTOR BEHAVIOR, NAME=name *CONNECTOR FAILURE, COMPONENT=component number, RELEASE=ALL or component number |
| ABAQUS/CAE Usage: | Interaction module: connector property editor: Add |
In the example in Figure 17.2.9–1 assume that the shock absorber pulls apart if the tensile force in the shock exceeds 800.0 units of force.
... *CONNECTOR BEHAVIOR, NAME=sbehavior *CONNECTOR FAILURE, COMPONENT=1, RELEASE=ALL , , , 800.0
The ABAQUS output variables available for connectors are listed in “ABAQUS/Standard output variable identifiers,” Section 4.2.1, and “ABAQUS/Explicit output variable identifiers,” Section 4.2.2. The following output variable is of particular interest when defining failure in connectors:
CFAILST | Flags for connector failure status. |
Failure: Components: component or components, Release: All or Specify component