Query on PBUSHT defined with KN line having non-linear force vs displacement graph

Your Force x Disp curve looks wrong.

As the elongation gets negative, your force increases positively.

I would expect something like this:

https://www.coursehero.com/study-guides/boundless-physics/hookes-law/

Your Force x Disp curve looks wrong.

As the elongation gets negative, your force increases positively.

 

I would expect something like this:

https://www.coursehero.com/study-guides/boundless-physics/hookes-law/

Hi,

Thank you for your reply.

I am attaching the scenario where my spring is in function . 
Can you let me know how this can be plotted to represent the force -deflection curve in optistruct.

Hi,

Thank you for your reply.

I am attaching the scenario where my spring is in function . 
Can you let me know how this can be plotted to represent the force -deflection curve in optistruct.

you curve should be input in OS as a function of Force x Deflection for your spring. Similarly to what I've shared before.

In the right hand side you will have spring elongation, and at the left hand side, compression.

Yours is defined flipped.

Hi,

After flipping the curve (Image attached below), solver seems to give results as per force vs deflection table defined.

One question here is that in my case, there is a preload assigned to spring element and my force values would not be coming negative but as spring element force can be positive or negative based on applied load direction. So in this case, when spring element takes negative value, solver seems to follow the last two points slope .

Is there a way to apply force vs deflection graph with pre-load as in my table.

I can see that in PGAP property but cannot see force vs defection curve assigning to it.

Thank you for your support.