Abstract
This chapter will investigate the contact interaction physics and contact properties implemented with both Abaqus standard and explicit solvers. Contact definition is a source of high nonlinearity in FEA model and therefore, a good understanding regarding how to make a correct representation of physics in the model with the proper parameters will help to avoid numerical difficulties or an unconverged solution. Contact interactions are less complex to understand but more difficult to use because of the multiple combinations of settings to make a proper contact definition. This is why the sections in this chapter will take a closer look at contact generalities, contact and friction, hard and soft contact, and then different procedures used to fix certain troubleshooting issues related to contact. A series of examples will also be given to have a better overview of some option setting consequences.
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In Abaqus explicit, the user can define the facets of a surface on the interior of a solid element mesh. The faces of the specified elements that are not on the exterior (free) surface of the model will be included in the surface definition. For example, interior surfaces are used with the general contact algorithm in Abaqus explicit for modeling surface erosion due to element failure. The automatic generation of an interior surface is equivalent to constructing a surface consisting of all faces of the elements and then subtracting the free surfaces of those elements. Shell elements, beam elements, pipe elements, membrane elements, and so on are ignored since they do not have any interior faces by definition. Multi-point constraints are not taken into account when generating interior surfaces. This can result in faces that are on the interior of a body being excluded from the surface definition.
References
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Boulbes, R.J. (2020). Contact. In: Troubleshooting Finite-Element Modeling with Abaqus. Springer, Cham. https://doi.org/10.1007/978-3-030-26740-7_7
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DOI: https://doi.org/10.1007/978-3-030-26740-7_7
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