Small-sliding contact with specified clearance or overclosure values

This problem contains basic test cases for one or more Abaqus elements and features.

This page discusses:

ProductsAbaqus/StandardAbaqus/Explicit

Elements tested

C3D8 C3D8R

CAX4R

CPE4

CPE4R

R2D2

R3D4

S4R

Features tested

Contact interference

Initial clearance

Small-sliding contact pair

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 specifying the initial clearance value as zero, except when contact interference is used. In these cases the initial overclosure is resolved before the load is applied.

Model:

2D solid element dimensions 1.0 × 1.0 × 1.0
3D solid element dimensions 1.0 unit in each direction
3D shell element dimensions 20 units in diameter

Material:

Young's modulus 30 × 106
Poisson's ratio 0.0
Friction coefficient 0.0

General:

The Abaqus/Explicit model consists of three deformable bodies that are in contact with a rigid surface. Two different methods are used to define initial clearance values: specifying the clearance value or specifying secondary 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

Abaqus/Standard models involving CLEARANCE, BOLT

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.

clearance_bolt_compression.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using uniform axial component normal adjustment for a right-handed bolt; the bolt under compression loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using uniform axial component normal adjustment for a right-handed bolt; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_opp_ms.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using uniform axial component normal adjustment for a right-handed bolt; the bolt under tension loading; the bolt surface acting as the secondary surface and the nut surface acting as the main surface.
clearance_bolt_tension_twoway.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment for a right-handed bolt; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_twoway_left.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment for a left-handed bolt; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_twoway_opp_ms.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment for a right-handed bolt; the bolt under tension loading; the bolt surface acting as the secondary surface and the nut surface acting as the main surface.
clearance_bolt_tension_wrongdir.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; contact lost by using the axis defined from the bolt head toward the bolt tip; using uniform axial component normal adjustment for a right-handed bolt; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_thermalexpansion_twoway.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment for a right-handed bolt; the bolt under thermal expansion loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_coarse.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using uniform axial component normal adjustment for a right-handed bolt; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface; coarse meshes.
clearance_bolt_tension_twoway_coarse.inp
C3D8R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment for a right-handed bolt; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface; coarse meshes.
clearance_bolt_compression_twoway_2d.inp
CAX4R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment; the bolt under compression loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_2d.inp
CAX4R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using uniform axial component normal adjustment; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_twoway_2d.inp
CAX4R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_tension_wrongdir_2d.inp
CAX4R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; contact lost by using the axis defined from the bolt head toward the bolt tip; using uniform axial component normal adjustment; the bolt under tension loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.
clearance_bolt_thermalexpansion_twoway_2d.inp
CAX4R elements, contact directions redefined by specifying the thread geometry data and the two points on the axis of the bolt/nut hole; using location-dependent normal adjustment; the bolt under thermal expansion loading; the bolt surface acting as the main surface and the nut surface acting as the secondary surface.

Other 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.

Other 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.inp

POST OUTPUT analysis.

ei34siro_po_surf.inp

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

ei34sisc.inp

C3D8 elements, CONTACT INTERFERENCE.

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.

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 secondary nodes and their corresponding initial clearance values.