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laws:silcoetc
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SILCOETC
Description
Full law name : SILCOETC3D
Coupled plastic-damage multiracial constitutive law for concrete behaviour.
For further details see PhD thesis of Thomas Gernay or Andra report by B. Cerfontaine.
The model
Files
Prepro: LSILCOETC3D.F
Lagamine: PIL_SILCOET3D.F
Availability
| Plane stress state | NO |
| 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 | 618 |
| COMMNT | Any comment (up to 60 characters) that will be reproduced on the output listing |
Integer parameters
| Line 1 (6I5) | |
|---|---|
| NINTV | = 0 : By default |
| ISOL | = 0 : Use of total stresses in the constitutive law |
| ≠ 0 : Use of effective stresses in the constitutive law (See annex 7) | |
| KMETH | = 2 : Actualised vgrad method |
| = 3 : Mean vgrad method (default) | |
| ITEMP | $n$ = 0 : Influence of temperature (not yet activated) (by default) |
| ICREEP | = 0 : Introduction of creep (not yet activated) (by default) |
| IHYDR | = 0 : Early age behaviour (not yet activated) (by default) |
Real parameters
| Line 1 (5G10.0) | |
|---|---|
| fc | Uniaxial compression strength |
| ft | Uniaxial tension strength |
| fc0 | Uniaxial compression elastic limit (by default = 0.3fc) |
| fb | Biaxial strength (by default = 1.16fc) |
| $\varepsilon_{peak}$ | Total deformation at peak stress for uniaxial compression |
| Line 2 (4G10.0) | |
| ANU | POISSON's ratio |
| E | YOUNG's elastic modulus |
| DIV | DIV parameter |
| RHO | Specific mass |
| Line 3 (4G10.0) | |
| $\alpha$g | Dilatancy parameters |
| dc | Damage at peak stress for uniaxial compression |
| gt | Crack energy density per unit volume [Nm/m$^2$] |
| xc | Ratio between crack energy dissipated before peak and total energy dissipated |
If ICREEP == 1 :
| Line 4 (XG10.0) | |
|---|---|
| X | Creep parameters |
If IHYDR == 1 :
| Line 5 (4G10.0) | |
|---|---|
| ALPHATH | Hydration threshold (properties are equal to Eth/E0) |
| Pa | Parameter for the evolution of strength |
| Pb | Parameter for the evolution of stiffness |
| Eth | Elastic stiffness below threshold |
Note : The evolution of the hydration degree must be specified in file .hydr such that :
| TIMES |
| (I10) Number of time steps defined below |
| (2G10.0,repeated) Time step, alpha |
Stresses
Number of stresses
6 for 3D state
4 for the other cases
Meaning
The stresses are the components of CAUCHY stress tensor in global (X,Y,Z) coordinates.
For the 3-D state:
| SIG(1) | $\sigma_{xx}$ |
| SIG(2) | $\sigma_{yy}$ |
| SIG(3) | $\sigma_{zz}$ |
| SIG(4) | $\sigma_{xy}$ |
| SIG(5) | $\sigma_{xz}$ |
| SIG(6) | $\sigma_{yz}$ |
For the other cases:
| SIG(1) | $\sigma_{xx}$ |
| SIG(2) | $\sigma_{yy}$ |
| SIG(3) | $\sigma_{xy}$ |
| SIG(4) | $\sigma_{zz}$ |
State variables
Number of state variables
44
List of state variables
| Q(1) | Element thickness ($t$) in plane stress state |
| = 1 : Plane strain state | |
| Circumferential strain rate ($\varepsilon_r$) in axisymmetrical state | |
| = 0 : 3D state | |
| Element thickness ($t$) in generalized plane state | |
| Q(2) | Nothing |
| Q(3) | Volumetric deformation |
| Q(4-9) | Total strain (mechanical + transient) |
| Q(10-15) | Mechanical strain |
| Q(16-21) | Transient creep strain |
| Q(22-27) | Plastic strain |
| Q(29-30) | Damage : dt, dc |
| Q(31-32) | Internal variables : kt, kc |
| Q(33-38) | Effective stress |
| Q(39-44) | Compressive part of the effective stress |
laws/silcoetc.txt · Last modified: 2020/08/25 15:46 (external edit)
