# About general contact in Abaqus/Explicit

 Abaqus/Explicit provides two algorithms for modeling contact and interaction problems: the general contact algorithm and the contact pair algorithm. See About contact interactions for a comparison of the two algorithms. This section describes how to include general contact in an Abaqus/Explicit analysis, how to specify the regions of the model that may be involved in general contact interactions, and how to obtain output from a general contact analysis. The general contact algorithm in Abaqus/Explicit: is specified as part of the model or history definition of the model; allows very simple definitions of contact with very few restrictions on the types of surfaces involved; uses sophisticated tracking algorithms to ensure that proper contact conditions are enforced efficiently; can be used simultaneously with the contact pair algorithm (i.e., some interactions can be modeled with the general contact algorithm, while others are modeled with the contact pair algorithm); can be used only with three-dimensional surfaces; can be used only in mechanical finite-sliding contact analyses; and does not support kinematic constraint enforcement (contact constraints are enforced with the penalty method). The following topics are discussed:
 Related Topics About contact interactions In Other Guides *CONTACT *CONTACT INCLUSIONS *CONTACT EXCLUSIONS Defining general contact

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