License File and Usage

The ES-2 v4.5 is distributed with a license file which uses an expiry date. The license file is sent to the user with the whole dummy package. Different license files are necessary for different systems of units.
 
In the license file, all load curves are encrypted. There are parameters defined which can be used to offset the numbering of the load curves.  The load curves can be scaled by using parameters which are encrypted in the normal ES-2 input. The names of the parameters refer to the table or load curve ID of each material. So if the values of the table ID 1002 are to be scaled then the parameter s1002 must be used.
 
The principle structure is as follows:
 
Input data in the ES-2  license file:
 

*PARAMETER
$ Load Curve offset
I  lcoff           0
 
$ Load Curve scale values
R  sTABID         1.0 
 
 
Input of the license file:
 
*PARAMETER_EXPRESSION
I   lcTABID    TABID + &lcoff 
R  eTABID    1.0 * &sTABID
 
 
*DEFINE_CURVE
&lcTABID           0       1.0&eTABID            0.0        0.0
          <Values_x>          <Values_y>
             .
             .
             .

 
The license file must be included like a normal include file. But it is necessary that the license file is included AFTER the ES-2 file. LS-DYNA has to first read the ES-2 input data and then the PARAMETER_EXPRESSION in the license file. Otherwise LS-DYNA will terminate with an error because of missing parameters.
 
The expiry date and the owner of the license are printed out in the d3hsp file of LS-DYNA. The name of the license file also includes the company name and the expiry date of the dummy.
 

For the work in a pre-processor, an additional file is delivered:

This work file includes the same input as the encrypted license file. The only difference is the scaling of the load curves in the work file. The load curves are scaled randomly in a wrong range and they are much too soft to be used for a LS_DYNA simulation. But the file can be used to observe the quality and course of the material curves.