Constitutive law for unilateral contact
Available for CNTCP
See coupled law COU2DC/COU3DC
This law is only used for mechanical analysis of problems involving unilateral contact between two bodies. COULOMB dry friction law is used. The contact condition in enforced via a penalty method.
Prepro: LCOUL2D.F
Lagamine: COUL2D.F
| Plane stress state | NO |
| Plane strain state | YES |
| Axisymmetric state | YES |
| 3D state | NO |
| Generalized plane state | YES |
| Line 1 (2I5, 60A1) | |
|---|---|
| IL | Law number |
| ITYPE | 94 |
| COMMENT | Any comment (up to 60 characters) that will be reproduced on the output listing |
| Line 1 (1I5) | |
|---|---|
| IBOUE | Index to take into account residual pressure |
| 0 no effect taken into account | |
| Line 1 (4G10.0 ) | |
|---|---|
| AKP | penalty coefficient on the contact pressure ($=K_P$) |
| AKTAU | penalty coefficient on the contact pressure ($=K_\tau$) |
| PHI | COULOMB’s friction coefficient, ($=\tan\phi$) |
| PBOUE | Residual pressure |
= 4
| SIG(1) | the normal pressure at contact |
| SIG(2) | no meaning |
| SIG(3) | the tangent stress at contact |
| SIG(4) | no meaning |
2
| Q(1) | = 0 if the current state is elastic (no sliding) |
| = 1 if the current state is elasto‑plastic (i.e. sliding has occurred at contact). | |
| = IELD | |
| Q(2) | = 0 if there is a contact |
| = 1 if there is no contact | |
| = NOCON |