Uniaxial material: isotropic hardening (plastic behaviour)

[nbazaraa]

Hi ...
I want to model plastic behaviour of steel material in OpenSees. I have the following stress strain history: (stress N/mmw vs strain)
275 0
275 0.011899038
278.4504264 0.012899038
302.0175582 0.02
317.6292699 0.025
332.4289696 0.03
346.4166573 0.035
359.592333 0.04
371.9559966 0.045
383.5076483 0.05
394.2472879 0.055
404.1749155 0.06
413.2905312 0.065
421.5941348 0.07
429.0857264 0.075
435.7653059 0.08
441.6328735 0.085
446.6884291 0.09
450.9319726 0.095
454.3635041 0.1
Also, is there any further reference to explain the isotropic parameters a1 a2 a3 a4 of Steel01 othe than the command manual?

[Toutant]

I have a PDF document you might be interested in.

[nbazaraa]

Please revert it to me.