Abaqus Constitutive equation

[abaqus12]

Hi,

I'm new with Abaqus and I'm stuck with this problem(probably very simple) :
I would like to write a constitutive equation
\sigma=C (E -E_0)

where:
C=elastic moduli tensor
\sigma stress tensor
E_0 known strain
E unknown strain

Is that possibile in Abaqus?If yes, could you please tell me how should I insert the input data related to the known strain E_0?

Thanks a lot for any help

G.