Opensees Saws material code

[YannSousseau]

Hello,

I am trying to constitute a load displacement curve, from displacement values and a Saws material model.

To this end, I use code examples provided by Opensees (https://opensees.berkeley.edu/wiki/inde ... S_Material).

The problem is this : when I execute the code many times, results provided (load values) are not consistent.
For some iterations, results are correct (https://ibb.co/DR73d0n), while for others interations, results are uncorrect (https://ibb.co/sQP8ynz).

In fact, I will need to execute such code many time, for an optimization procedure.

I thank you for your help.

Yann

[mhscott]

Do you have the same issue with the Tcl version of OpenSees? I ask because it could be a problem with the inputs or with the material implementation, e.g., revertToStart. Generally, we need more information than what you provided.

[YannSousseau]

Thank you for your help.

I haven't tried with the Tcl version, because I don't have this version.
So I have tried with the Python version.

The code I use is on the link (https://www.cjoint.com/c/JFcqBb6MwfW), and results are on the links
(https://www.cjoint.com/c/JFcqB50oiWW, https://www.cjoint.com/c/JFcqCHDL6UW).

"LoadDisp_i" file contain results (load values) corresponding to iteration i.
Iterations 0 and 99 correspond to figures (https://ibb.co/DR73d0n) and (https://ibb.co/sQP8ynz) respectively.