Finite-sliding contact between stress/displacement elements

Elements tested

C3D4
C3D5
C3D8
C3D8H
C3D10M
C3D20

CAX4
CAX8
CGAX3
CGAX4
CGAX6
CGAX6M
CGAX8

CPE4
CPE6M
CPE6MH
CPE8
CPS6M

CCL12
CCL24

MCL6
MCL9

ITT21
ITT31

Features tested

Contact pair

Problem description

This section deals with the surface-based approach to contact between stress/displacement elements.

Most tests are run with and without friction. A coefficient of friction of 0.2 is used in all tests with isotropic friction. In most tests Step 1 results in contact and Step 2 initiates sliding. Several tests conduct direct-integration and subspace-based steady-state dynamic analyses.

Results and discussion

The contact pressure and tractions agree with the analytical results.

Input files

Zero friction:

ei304fcz.inp: C3D4 elements.
ei304fcz_surf.inp: C3D4 elements using surface-to-surface contact.
ei305fcz.inp: C3D5 elements.
ei305fcz_surf.inp: C3D5 elements using surface-to-surface contact.
ei308fhz.inp: C3D8/C3D8H elements.
ei308fhz_surf.inp: C3D8/C3D8H elements using surface-to-surface contact.
eig08fcz.inp: C3D8 elements, node-based surface.
ei310fmz.inp: C3D10M elements.
ei310fmz_surf.inp: C3D10M elements using surface-to-surface contact.
ei320fcz.inp: C3D20 elements.
ei320fcz_surf.inp: C3D20 elements using surface-to-surface contact.
eia04faz.inp: CAX4 elements.
eia04faz_surf.inp: CAX4 elements using surface-to-surface contact.
eia08faz.inp: CAX8
eia08faz_surf.inp: CAX8 elements using surface-to-surface contact
ei204fez.inp: CPE4 elements.
ei204fez_surf.inp: CPE4 elements using surface-to-surface contact.
ei206fmz.inp: CPE6M elements.
ei206fmz_surf.inp: CPE6M elements using surface-to-surface contact.
ei206fhz.inp: CPE6MH elements.
ei208fez.inp: CPE8 elements.
ei208fez_surf.inp: CPE8 elements using surface-to-surface contact.
ei206fsz.inp: CPS6M elements.
ei206fsz_surf.inp: CPS6M elements using surface-to-surface contact.

Friction:

ei304fcf.inp: C3D4 elements.
ei304fcf_surf.inp: C3D4 elements using surface-to-surface contact.
ei305fcf.inp: C3D5 elements.
ei305fcf_surf.inp: C3D5 elements using surface-to-surface contact.
ei308fcf.inp: C3D8 elements.
ei308fcf_surf.inp: C3D8 elements using surface-to-surface contact.
ei308fhf.inp: C3D8/C3D8H elements.
ei308fhf_surf.inp: C3D8/C3D8H elements using surface-to-surface contact.
eig08fcf.inp: C3D8 elements, node-based surface.
ei310fmf.inp: C3D10M elements.
ei310fmf_surf.inp: C3D10M elements using surface-to-surface contact.
ei320fcf.inp: C3D20 elements.
ei320fcf_surf.inp: C3D20 elements using surface-to-surface contact.
ei320fcf_auglagr.inp: C3D20 elements.
ei320fcf_auglagr_surf.inp: C3D20 elements using surface-to-surface contact.
eia04faf.inp: CAX4 elements.
eia08faf.inp: CAX8 elements.
eia08faf_auglagr.inp: CAX8 elements.
eia03fgf.inp: CGAX3 elements.
eia04fgf.inp: CGAX4 elements.
eia06fgf.inp: CGAX6 elements.
eia06fgf_surf.inp: CGAX6 elements using surface-to-surface contact.
eia06fgmf.inp: CGAX6M elements.
eia08fgf.inp: CGAX8 elements.
ei204fef.inp: CPE4 elements.
ei206fmf.inp: CPE6M elements.
ei206fhf.inp: CPE6MH elements.
ei208fef.inp: CPE8 elements.
ei208fef_auglagr.inp: CPE8 elements.
ei206fsf.inp: CPS6M elements.
ei312fcf.inp: CCL12, MCL6 elements.
ei312fcf_surf.inp: CCL12, MCL6 elements using surface-to-surface contact.
ei324fcf.inp: CCL24, MCL6 elements.
ei324fcf_surf.inp: CCL24, MCL6 elements using surface-to-surface contact.
ei306fcf.inp: MCL6, MCL9 elements.
ei306fcf_surf.inp: MCL6, MCL9 elements using surface-to-surface contact.
ei309fcf.inp: MCL9 elements.
ei309fcf_surf.inp: MCL9 elements using surface-to-surface contact.

Verification of the tube-tube interface element approach:

ei21stce.inp: ITT21 elements, external contact.
ei21stci.inp: ITT21 elements, internal contact.
ei31stce.inp: ITT31 elements, external contact.
ei31stci.inp: ITT31 elements, internal contact.