Modified contact pressure-overclosure relationship

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

This page discusses:

Elements tested
Features tested
Problem description
Results and discussion
Input files

ProductsAbaqus/StandardAbaqus/Explicit

Elements tested

CAX4

CAX4H

CAX4R

IRS21A

ISL21A

GAPUNI

Features tested

Modifications to the contact pressure-overclosure relationship are tested for a number of cases.

Problem description

This set of tests verifies the softened contact option. All the tests are for axisymmetric, large-displacement, static analyses with finite sliding. The model in each test consists of a die pressing down on a rubber cylinder. The die is modeled either as a rigid surface or as a deformable body with mild steel properties. CAX4 elements are used in the Abaqus/Standard analyses, and CAX4R elements are used in the Abaqus/Explicit analyses. The blank is modeled as an incompressible Mooney-Rivlin material with CAX4H elements in Abaqus/Standard and CAX4R elements in Abaqus/Explicit. The bottom surface of the blank is constrained against vertical motion.

Each analysis has one step, in which a vertical prescribed displacement is applied to the die.

Results and discussion

The analysis results indicate that the die penetrates the blank according to the prescribed pressure-overclosure relationship.

Input files

Abaqus/Standard input files

Tabular pressure-overclosure relationship:

xsctdd.inp: Deformable-deformable surface-based contact.
xsctdr.inp: Deformable-rigid surface-based contact.
xsctirs.inp: IRS contact elements.
xsctisl.inp: ISL contact elements.
xsctgap.inp: GAPUNI contact elements.

Linear pressure-overclosure relationship:

xscldr.inp: Deformable-rigid surface-based contact.

Exponential pressure-overclosure relationship:

xscxdd.inp: Deformable-deformable surface-based contact.
xscxdr.inp: Deformable-rigid surface-based contact.
xscxirs.inp: IRS contact elements.
xscxisl.inp: ISL contact elements.
xscxgap.inp: GAPUNI contact elements.

Abaqus/Explicit input files

Linear pressure-overclosure relationship:

linsoft_xpl_nosep.inp: Deformable-rigid kinematic contact with no separation surface behavior.
linsoft_xpl_nosep_pnlty.inp: Deformable-rigid penalty contact with no separation surface behavior.

Exponential pressure-overclosure relationship:

expsoft_xpl_def_pnlty.inp: Deformable-deformable penalty contact.
expsoft_xpl_def_gc.inp: Deformable-deformable general contact.
expsoft_xpl_rig_pnlty.inp: Deformable-rigid penalty contact.
expsoft_xpl_rig_gc.inp: Deformable-rigid general contact.

Tabular pressure-overclosure relationship:

tabsoft_xpl_def.inp: Deformable-deformable kinematic contact.
tabsoft_xpl_def_gc.inp: Deformable-deformable general contact.
tabsoft_xpl_rig.inp: Deformable-rigid kinematic contact.
tabsoft_xpl_rig_gc.inp: Deformable-rigid general contact.