1.6.16 Small-sliding contact with specified clearance or overclosure values

Products: ABAQUS/Standard  ABAQUS/Explicit  

Elements tested

C3D8    CPE4    CPE4R    R2D2    R3D4    S4R   

Features tested

*CLEARANCE

*CONTACT INTERFERENCE

*CONTACT PAIR, SMALL SLIDING

Problem description

The ABAQUS/Standard model consists of two bodies with their contact surfaces initially overclosed. This initial overclosure is maintained throughout the analysis by using the *CLEARANCE option and specifying a zero clearance value, except when the *CONTACT INTERFERENCE option is used. In these cases the initial overclosure is resolved before the load is applied.

Model:

2-D solid element dimensions1.0 × 1.0 × 1.0
3-D solid element dimensions1.0 unit in each direction
3-D shell element dimensions20 units in diameter

Material:

Young's modulus30 × 106
Poisson's ratio0.0
Friction coefficient0.0

The ABAQUS/Explicit model consists of three deformable bodies that are in contact with a rigid surface. Three different methods are used to define initial clearance values: using the VALUE parameter or specifying slave nodes and their corresponding initial clearance values on data lines that either follow the keyword line or are read from an input file. A two-dimensional model is considered with the deformable bodies modeled using CPE4R elements and the rigid body modeled using rigid elements, R2D2.

Results and discussion

In all cases the results are correct throughout the analysis.

Input files

Two-dimensional ABAQUS/Standard models

ei22siam.inp

CPE4 elements, analytical rigid surface, contact directions redefined.

ei22siam_surf.inp

CPE4 elements, analytical rigid surface, contact directions redefined, surface-to-surface constraint enforcement method.

ei22siao.inp

CPE4 elements, analytical rigid surface, contact directions calculated by ABAQUS.

ei22siao_surf.inp

CPE4 elements, analytical rigid surface, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

ei22sinm.inp

CPE4 elements, node-based surface, contact directions redefined.

ei22sinm_surf.inp

CPE4 elements, node-based surface, contact directions redefined, surface-to-surface constraint enforcement method.

ei22sino.inp

CPE4 elements, node-based surface, contact directions calculated by ABAQUS.

ei22sino_surf.inp

CPE4 elements, node-based surface, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

ei22sirc.inp

CPE4, R2D2 elements, *CONTACT INTERFERENCE.

ei22sirc_surf.inp

CPE4, R2D2 elements, *CONTACT INTERFERENCE, surface-to-surface constraint enforcement method.

ei22sirm.inp

CPE4, R2D2 elements, contact directions redefined.

ei22sirm_surf.inp

CPE4, R2D2 elements, contact directions redefined, surface-to-surface constraint enforcement method.

ei22siro.inp

CPE4, R2D2 elements, contact directions calculated by ABAQUS.

ei22siro_surf.inp

CPE4, R2D2 elements, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

ei22sism.inp

CPE4 elements, contact directions redefined.

ei22sism_surf.inp

CPE4 elements, contact directions redefined, surface-to-surface constraint enforcement method.

ei22siso.inp

CPE4 elements, contact directions calculated by ABAQUS.

ei22siso_surf.inp

CPE4 elements, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

Three-dimensional ABAQUS/Standard models

ei34siam.inp

C3D8 elements, analytical rigid surface, contact directions redefined.

ei34siam_surf.inp

C3D8 elements, analytical rigid surface, contact directions redefined, surface-to-surface constraint enforcement method.

ei34siao.inp

C3D8 elements, analytical rigid surface, contact directions calculated by ABAQUS.

ei34siao_surf.inp

C3D8 elements, analytical rigid surface, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

ei34sinm.inp

C3D8 elements, node-based surface, contact directions redefined.

ei34sinm_surf.inp

C3D8 elements, node-based surface, contact directions redefined, surface-to-surface constraint enforcement method.

ei34sino.inp

C3D8 elements, node-based surface, contact directions calculated by ABAQUS.

ei34sino_surf.inp

C3D8 elements, node-based surface, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

ei34sirc.inp

C3D8, R3D4 elements, *CONTACT INTERFERENCE.

ei34sirc_surf.inp

C3D8, R3D4 elements, *CONTACT INTERFERENCE, surface-to-surface constraint enforcement method.

ei34sirm.inp

C3D8, R3D4 elements, contact directions redefined.

ei34sirm_surf.inp

C3D8, R3D4 elements, contact directions redefined, surface-to-surface constraint enforcement method.

ei34siro.inp

C3D8, R3D4 elements, contact directions calculated by ABAQUS.

ei34siro_surf.inp

C3D8, R3D4 elements, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

ei34siro_po_surf.inp

*POST OUTPUT analysis, surface-to-surface constraint enforcement method.

ei34sisc_surf.inp

C3D8 elements, *CONTACT INTERFERENCE, surface-to-surface constraint enforcement method.

ei34sism.inp

C3D8 elements, contact directions redefined.

ei34sism_surf.inp

C3D8 elements, contact directions redefined, surface-to-surface constraint enforcement method.

ei34siso.inp

C3D8 elements, contact directions calculated by ABAQUS.

ei34siso_surf.inp

C3D8 elements, contact directions calculated by ABAQUS, surface-to-surface constraint enforcement method.

contact_s4r_clear.inp

S4R elements, contact directions redefined by specifying the components of the vectors directly.

contact_s4r_clear_bolt.inp

S4R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/bolt hole.

ABAQUS/Explicit model

contact2D_clear.inp

Two-dimensional contact analysis with three contact pairs with specified initial clearances.

contact2D_clear_data.inp

File containing a list of slave nodes and their corresponding initial clearance values.