nDmaterial ManzariDafalias in version 2.5.0

[teymoorian]

Hi
I faced another difference between OpenSees versions 2.4.6 and 2.5.0. I have modeled a 3D soil medium. For "nDMaterial ElasticIsotropic" both versions give exactly the same response. But for "nDmaterial ManzariDafalias" the responses are very different between version 2.4.6 and 2.5.0 !!! what is the problem?

[sb1966]

Hi,

Please refer to change log (http://opensees.berkeley.edu/OpenSees/changeLog.php) for the difference. It says:
"ManzariDafalias updated wth new staggering method and line search algorithms by P. Arduino (UW) ".

Hope this clarifies the issue.

[teymoorian]

sb1966 wrote:
> Hi,
>
> Please refer to change log
> (http://opensees.berkeley.edu/OpenSees/changeLog.php) for the difference.
> It says:
> "ManzariDafalias updated wth new staggering method and line search
> algorithms by P. Arduino (UW) ".

Hi
Tnx
I have noticed that before, but the point is that the responses are too much different!!! the difference is very considerable ... even the sign of displacements are different and that is not logical to me

[sb1966]

Hi,

I have not myself used ManzariDafalias model earlier and hence it is not possible for me to tell you something definitive. In that case I think it is better to contact Prof Arduino.

Good luck.

[teymoorian]

sb1966 wrote:
> Hi,
>
> I have not myself used ManzariDafalias model earlier and hence it is not
> possible for me to tell you something definitive. In that case I think it
> is better to contact Prof Arduino.
>
> Good luck.

That's a very good idea, thank you so much