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laws:loacq
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LOACQ
Description
Constitutive law for loading (thin) 3D shell elements.
The model
This law is used for mechanical analysis of shells, loaded by uniform pressure and shear, normal and tangential to the mid-line $\xi$ at any moment, or in the global axes.
Loading can be driven either by force multiplicator (MULTF) or displacement multiplicator (MULTD).
Files
Prepro: LLOACQ.F
Lagamine: CLCOQ4.F
Availability
| Plane stress state | NO |
| Plane strain state | NO |
| 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 | 99 |
| COMMENT | Any comment (up to 60 characters) that will be reproduced on the output listing |
Integer parameters
| Line 1 (I5) | |
|---|---|
| IDIRC | Index of the loading direction |
| = 0 : Local direction | |
| = 1 : Global direction | |
Real parameters
| Line 1 (3G10.0) | |
|---|---|
| PRESSF | Pressure $p_o$ (which will be multiplied by MULTF) |
| TAURF | Shear $\tau_r$ (which will be multiplied by MULTF) |
| TAUSF | Shear $\tau_s$ (which will be multiplied by MULTF) |
| Line 1 (3G10.0) | |
| PRESS | Pressure $p_o$ (which will be multiplied by MULTD) |
| TAURD | Shear $\tau_r$ (which will be multiplied by MULTD) |
| TAUSD | Shear $\tau_s$ (which will be multiplied by MULTD) |
Stresses
Number of stresses
3
Meaning
| SIG(1) | = p : Pressure (= $p_o$ * MULT) |
| > 0 according with local coordinates of shell | |
| SIG(2) | = $\tau$ : Shear (= $\tau_r$ * MULT) |
| > 0 according with local coordinates of shell | |
| SIG(3) | = $\tau$ : Shear (= $\tau_s$ * MULT) |
| > 0 according with local coordinates of shell |
State variables
Number of state variables
1
List of state variables
| Q(1) | Without any meaning |
laws/loacq.1570720152.txt.gz · Last modified: 2020/08/25 15:35 (external edit)
