====== SOLCP1 ======
===== Description =====
Linear constitutive law of flow and deformation in porous media for a pipe element

==== The model ====
This law is used for linear analysis of coupled seepage and compaction in porous media.\\
This law is used for one‑dimensional problems.
==== Files ====
Prepro: LSOCP1.F \\
Lagamine: SOLCP1.F
===== Availability =====
|Plane stress state| YES |
|Plane strain state| YES |
|Axisymmetric state| NO |
|3D state| NO |
|Generalized plane state| NO |
===== Input file =====
==== Parameters defining the type of constitutive law ====
^ Line 1 (2I5, 60A1)^^
|IL|Law number|
|ITYPE| 210 |
|COMMENT| Any comment (up to 60 characters) that will be reproduced on the output listing|
==== Integer parameters ====
None 
==== Real parameters ====
^ Line 1 (5G10.0) ^^
|PERMEA|soil permeability (= k)|
|GAMMA|specific weight of the fluid (= q)|
|OED|oedometer elastic parameter|
|AREA|cross section of the pipe|
|POROS|soil porosity ($=n_0$)|

Note : Y axis is vertical directed from bottom to top.  Gravity same direction, other sense.


===== Stresses =====
==== Number of stresses ====
4 
==== Meaning ====
|SIG(1)|axial effective stress|
|SIG(2)|fluid flow in the pipe|
|SIG(3)|fluid flow accumulated as a consequence of the evolution of soil porosity = strain rate|
|SIG(4)|axial total stress|

===== State variables =====
==== Number of state variables ====
2
==== List of state variables ====
For 2D analysis :
|Q(1)| cross section of the pipe |
|Q(2)| porosity |