Contact formulation for ABAQUS/Standard contact pairs, Section 21.2.2
Removing/reactivating ABAQUS/Standard contact pairs, Section 21.2.4
Contact modeling if substructures are present, Section 21.2.7
Contact modeling if asymmetric-axisymmetric elements are present, Section 21.2.8
Common difficulties associated with contact modeling in ABAQUS/Standard, Section 21.2.9