methods to simulate bilinear model on ABAQUS 1

[nama21cha]

Greetings,

My challenge is to come up with simplified model of lead rubber bearing and simulate for seismic isolation of a large Steel equipment.
I need a suitable element ( similar to COMBIN40 in ANSYS) which can simulate bilinear model and consider effect of viscous damping.
The basic parameters of the lead rubber bearing mainly include: stiffness before yielding K1, stiffness after yielding K2, yield load Qy, damping ratio C.

Thank you & Stay safe!
nama

 

[FEA way]

You could try modelling this with connectors. They offer a lot of flexibility and you can define several behaviors for them (including elasticity, plasticity and damping). They are also available with different DOFs for various purposes.

 

[nama21cha]

Thank you for your suggestion.
Can you recommend specific type of connector that i should use?

 

[FEA way]

In this case you should use axial connector but you may also need the slot one. Apart from that, take a look at how connectors can be used in parallel and in series (documentation chapter "Connector behavior".