You can use the Interaction module to define the following:

Interactions are step-dependent objects, which means that when you define them, you must indicate in which steps of the analysis they are active. (For more information about step-dependent objects, see “Understanding the status of an object in a step,” Section 3.4.4.) For example, you can define film and radiation conditions on a surface only during a heat transfer, coupled temperature-displacement, or coupled thermal-electrical step. Similarly, you can define an interaction with a user-defined actuator/sensor only during the initial step.

The Set and Surface toolsets in the Interaction module allow you to define and name regions of your model to which you would like interactions and constraints applied. You can use the Amplitude toolset to define variations in some interaction attributes over the course of the analysis. You can use the Reference Point toolset to define reference points that are used in constraints and connectors.

ABAQUS/CAE does not recognize mechanical contact between part instances or regions of an assembly unless that contact is specified in the Interaction module; the mere physical proximity of two surfaces in an assembly is not enough to indicate any type of interaction between the surfaces.

For information on defining cracks, see “Modeling fracture mechanics,” Section 20.1. For information on defining inertia, see “Modeling inertia,” Section 20.2. For information on defining springs and dashpots, see “Modeling springs and dashpots,” Section 20.4.