Link (plastic) yield strength

[achrysov]

Hello everyone.
I am modeling a structure using Link elements with non-linear behaviour. I am using the Plastic (wen) behaviour.
I define the Yield strength at a certain value (eg 167,00) and at the result i see that at a certain time step in the Time_History analysis the link has reached the moment 169 !
Is that possible ?
The Post-Yield_Stiffness-Ratio is asigned to 0 so i shouldn't have this kind of behaviour.
Welcome any comments....

 

[cbrn]

Hi,
you have 1.2 % error here, so I'd say this is perfectly admissible due to some numerical approximation. Be aware that Link elems are line-elements so all data on the "external" (axial stress due to bending, for example) is calculated on the basis of "what happens" on the element's axis.
Perhaps by looking in the Theory Manual for the element you are using, you could find some more info about how the formulation works (and thus, how big are the intrinsic errors you can expect...).

Regards