Missing documentation of Flageshape model in openseespy

[MereenBaloch]

Hello everyone.

I am currently using the flagshape material model in OpenSeespy. However, I cannot find the user command line in OpenSeespy material library. Currently, I am using the command ops.uniaxialMaterial('FlagShape', tag, E, Fy, Eh ,beta). the command line is working well but the issue is, from my force displacement graph, I am getting a rounded shape at the transition point from elastic to post elastic. However, based on my knowledge for the said model the transition should be smooth. I have also tried the same model in opensees tcl , the shapes of the graphs are smooth at the transition point. I am wondering if there may be an optional command that may control this transition? Here is the link to the source code of the material https://github.com/OpenSees/OpenSees/bl ... terial.cpp .

[herringbur]

I see a problem from lines 311-320

[mhscott]

What's the problem?