volumetric shrinkage in ansys
 

Hi
I want to simulate a tooth. it has 2 part. I want to set volumetric shrinkage to one of them and after 20 seconds see the shrinkage and stress in whole bodies. the tooth is isotherm and the temperature is 22 C. so I Can't use thermal module. what do you guys recommend for this physic? I can't find a setting for volumetric shrinkage simulation.