Learning Forum

[Noura Mansour]

Can i ask you a question please .

If i want to design a nonlinear spring that achieve this nonlinear relationship between force displacement 

And at zero deformation there is a load 180 N 

And the deformation increase by increasing the load 

How can i insert these boundary conditions at ansys 

[mrife]

Hi

You can change the 'Longitudinal Stiffness' of a Spring to 'Tabular Data' then enter the force-deflection data points in the table that appears.  After inserting a Spring in WB Mechanical.

Mike

[Noura Mansour]

How can i make this if inserted the spring geomtry from SOLIDWORKS ?

[mrife]

Oh ok, that is a different problem altogether.  So you have a 3D model of a spring?  The stiffness will be a function of the geometry and the material.  Do you need a 3D model of the spring?  Or just a 2 node line element representation of the spring that has a force-displacement function that matches what you are showing in the plot?

[Noura Mansour]

3D model 

[mrife]

So not really a boundary condition, more of a 3D modeling and material property issue then, right?

[Noura Mansour]

Sorry I can't understand you what do you mean ?

[mrife]

I mean if you want a 3D model of a spring, which has a specific force-deflection curve, then the 3D geometry plus the material (and possibly other factors like contact) determine the force deflection of the system.  

[Noura Mansour]

Yes i understood but i want to ask about how i insert a load at zero deformation like the curve