====== FCZML ======
===== Description =====
Constitutive law for bilinear Crisfield’s cohesive zone model coupled with fatigue
==== The model ====
The model is a bilinear Cohesive Zone Model of Crisfield. The normal and shear stresses are computed.  
==== Files ====
Prepro: LFCZML.F \\
Lagamine: FCZML.F, FCZML3.F
===== Availability =====
|Plane stress state|YES |
|Plane strain state| YES|
|Axisymmetric state| NO |
|3D state| YES|
|Generalized plane state| NO |
===== Input file =====
==== Parameters defining the type of constitutive law ====
^ Line 1 (2I5, 60A1)^^
|IL|Law number|
|ITYPE| 297|
|COMMENT| Any comment (up to 60 characters) that will be reproduced on the output listing.|

==== Real parameters====
^Line 1 (9G10.0)^^
|SIGMAX|maximal cohesive normal stress|
|DN0| normal separation when the normal stress is maximal|
|DNC| normal separation when the normal stress is null|
|TAUMAX| maximum cohesive shear stress|
|DT0|shear separation when the shear stress is maximal|
|DTC| normal separation when the normal stress is null|
|ALPHA|material parameters|
|ZETAN|Normal cohesive viscosity parameters|
|ZETAT|Shear cohesive viscosity parameters|
===== Stresses =====
==== Number of stresses ====
2 (2D)\\ 3 (3D)
==== Meaning ====
**2D**
|SIG(1)|shear stress|
|SIG(2)|normal stress|
**3D**
|SIG(1)| normal stress|
|SIG(2)|shear stress in direction p|
|SIG(3)| shear stress in direction s|
===== State variables =====
==== Number of state variables ====
2
==== List of state variables ====
|Q(1)|IREG:\\ 0: cohesive behaviour\\ 1: crack behaviour (stress null and no stiffness)|
|Q(2)|DK: monotonic damage evaluation|