Table of Contents
RESPLA
Description
Elasto-plastic constitutive law for RESSO bound elements.
The model
This law is used for mechanical analysis of elasto-plastic isotropic porous media undergoing large strains.
Files
Prepro: LRESPL.F
Availability
| Plane stress state | YES |
| Plane strain state | YES |
| Axisymmetric state | YES |
| 3D state | NO |
| Generalized plane state | YES |
Input file
Parameters defining the type of constitutive law
| Line 1 (2I5, 60A1) | |
|---|---|
| IL | Law number |
| ITYPE | 81 |
| COMMENT | Any comment (up to 60 characters) that will be reproduced on the output listing |
Integer parameters
| Line 1 (4I5) | |
|---|---|
| NCOU | Number of soil layers |
| IPLA | = 0 : Elastic bound |
| = 1 : Elasto-plastic bound | |
| ICREU | Soil digging index, affected by FMULT multiplicator |
| = 0 : No soil digging | |
| = 1 : Soil digging | |
| INAP | Water table modification index, affected by DMULT multiplicator |
| = 0 : No water table modification | |
| = 1 : Water table modification | |
Real parameters
| Line 1 (1G10.0) | |
|---|---|
| GAMWAT | Water density |
| Line 2 (2G10.0) | |
| YSUP | Upper Y level |
| YNAPPE | Water table Y level |
| Line 3 (7G10.0 to repeat NCOU time) | |
| YBASE(I) | Lower Y level of the layer I |
| AKRES(I) | Bound coefficient of the layer I |
| AKA(I) | Ka coefficient of the layer I |
| AK0(I) | Ko coefficient of the layer I |
| AKP(I) | Kp coefficient of the layer I |
| GAMSAT(I) | Saturated soil density of the layer I |
| GAMHUM(I) | Humid soil density of the layer I |
Stresses
Number of stresses
1
Meaning
| SIG(1) | = $\sigma_{\text{horizontal}}$ = $\sigma_h$ in the bound |
State variables
Number of state variables
4
List of state variables
| Q(1) | = IYIELD |
| = 0 if elastic behaviour ($K_a < K_{eff} < K_p$) | |
| = 1 if plastic behaviour with $K_{eff} = K_a$ | |
| = 2 if plastic behaviour with $K_{eff} = K_p$ | |
| Q(2) | = AKEFF : actual K coefficient ($K_a < K_{eff} < K_p$) |
| Q(3) | = FMULT |
| Q(4) | = DMULT |
