You can specify failure criteria for any component of relative motion. The failure criteria may depend on the motions of the available components of relative motion and on the forces/moments in both available and constrained components of relative motion. The failure occurs when any of the criteria are met, as opposed to when all of the criteria are met. For more information, see “Connector failure behavior,” Section 25.2.9 of the ABAQUS Analysis User's Manual.
When you define failure criteria that depends on forces/moments, the sum of the forces/moments from all of the behavior options is compared to the failure criteria. For the failure criteria to be valid, you must define a behavior option, such as elasticity, that generates a force/moment for the components of relative motion used to define the failure criteria.
To create or edit failure:
Display the connector section editor using one of the following methods:
To create a new connector section, follow the procedure outlined in “Creating connector sections,” Section 15.11.6.
To edit an existing connector section, select Connector
SectionManager from the main menu bar, select the connector section from the list that appears, and click Edit.
In the Edit Connector Section dialog box, do one of the following:
To define a new failure option, click Add and select Failure from the option menu that appears.
To edit an existing failure option, select the option from the Behavior Options list to display the associated data fields for that option.
In the Components field, toggle on the components of relative motion to be used to define failure criteria. If you want to specify different limits for different components, you must define multiple failure options.
Click the arrow to the right of the Release field, and select an option from the list that appears:
Select All to release all of the components of relative motion when any of the failure criteria are satisfied. The connector will have no effect on the analysis beyond that point.
Select Specify to choose the component of relative motion to release when any of the failure criteria are satisfied.
To define failure criteria based on motion, in the Position Failure Criteria portion of the editor, enter the limits for the relative positions of the available components of relative motion that will cause failure.
To define failure criteria based on forces/moments, in the Force/Moment Failure Criteria portion of the editor, enter the limits for the forces/moments of the available or constrained components of relative motion that will cause failure.
Select one of the following:
If you want to continue defining behavior options, click Add, select the desired behavior option, and continue the connector section definition. For instructions on defining other behavior options, see “Using the connector section editors,” Section 15.15.
If you want to view or edit an existing behavior option, select the option from the Behavior Options list. For instructions on editing behavior options, see “Using the connector section editors,” Section 15.15.
If you want to save your connector section definition and exit the editor, click OK.
