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Defining density as a solution dependent variable in VUMAT (Abaqus/Explicit)?

Shunlai.Zang's picture

Hi All,

I am trying to simulate tooth deformation. It involves that the density of tooth changes with deformation. I want to know is it possible to define density as a solution dependent variable in VUMAT?

 Thank you in advance!

 Shunlai

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Behrooz Fereidoonnezhad's picture

I have the same problem. does anyone know about it?

Matt Lewis's picture

Density is available at the mid-step configuration as documented in the User's Manual (in the density array).  Did you want to modify the density values or just have access to them?  You can always copy the density array into the StateNew array.  Modifying the density beyond what is appropriate from the relative volume change would be problematic in the typical time scale of an explicit dynamics calculations, as the energy balance would be off.  

 Matt Lewis
Los Alamos, New Mexico

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