Small-sliding contact with specified clearance or overclosure values

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.