PINCHING4 MATERIAL regd.

[Ashok]

Hi all,
I am stuck up in characterizing the parameters for pinching 4 material. The command is as given below.
uniaxialMaterial Pinching4 $matTag $ePf1 $ePd1 $ePf2 $ePd2 $ePf3 $ePd3 $ePf4 $ePd4 <$eNf1 $eNd1 $eNf2 $eNd2 $eNf3 $eNd3 $eNf4 $eNd4> $rDispP $rForceP $uForceP <$rDispN $rForceN $uForceN > $gK1 $gK2 $gK3 $gK4 $gKLim $gD1 $gD2 $gD3 $gD4 $gDLim $gF1 $gF2 $gF3 $gF4 $gFLim $gE $dmgType

I am unable to understand the last 17 parameters. They are related to strength and stiffness degradation. But even if I put them as "0", still I am
able to get the output. But will it be correct? What would be the difference?
(or) is there a way to get these parameters.


Thank you...

[selimgunay]

Please see the example here for the effect of parameters

https://opensees.berkeley.edu/wiki/inde ... ialExample