How to model rubber (with damping) in ABAQUS ?

[Jit]

Hi,

How is a rubber or polymer material typically defined in ABAQUS for dynamic (direct integration transient) analysis ?

I am using ABAQUS to model dynamics of an engine mount in time domain. The engine mount is made of natural rubber material. The material data available to me is dynamic shear modulus and damping factor - both as as a function of forcing frequency. Here the damping factor (dimensionless) is the ratio of Loss Modulus to Storage Modulus. What is the best way to impliment this material properties in ABAQUS?

Thanking you,
Jit.

[ashu28]

Hello Jit,
Which rubber in particular you want to model? As a starting point, you might want to have a look at the Bergstrom-Boyce Model. It can be invoked using *HYSTERSIS option.

Ashu

[Grant]

For an engine mount, you can probably get away with modeling it as linear viscoelastic.

In that case, you would specify *VISCOELASTIC properties in addition to the short-term or long-term (your choice) elastic properties. There are many ways to define the viscoelastic properties - see the ABAQUS manuals. Be careful, because the coefficients you specify on the data lines are somewhat idiosyncratically defined in ABAQUS.