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laws:lstiff
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LSTIFF
Description
Constitutive law defining a concentrated stiffness at one node, onde degree of freedom, possible use as a linear spring.
The model
Definition of a stiffness at one DOF, useful in case of contact solid-solid where one solid has only the stiffness issued from the contact elements.
In case of pilot node, it gives a stiffness and a stress to the foundation outside any contact occurrence. Only the element STIFF uses this law.
Files
Prepro: LLSTIFF.F
Availability
| Plane stress state | YES |
| Plane strain state | YES |
| Axisymmetric state | YES |
| 3D state | YES |
| Generalized plane state | YES |
Input file
Parameters defining the type of constitutive law
| Line 1 (2I5, 60A1) | |
|---|---|
| IL | Law number |
| ITYPE | 97 |
| COMMENT | Any comment (up to 60 characters) that will be reproduced on the output listing |
Integer parameters
None.
Real parameters
| Line 1 (3G10.0) | |
|---|---|
| STIFF | Value of the concentrated stiffness term |
| $\alpha$ | 2D angle to define direction of spring when IDDL = -1 (see STIFF element) |
| $\beta$ | Idem for 3D analysis |
laws/lstiff.txt · Last modified: 2020/08/25 15:46 (external edit)
