Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

flow rule in plasticity

Please login with a confirmed email address before reporting spam

I can not find how to define flow rule in plasticity module. Can user define flow rule in comsol? How to deal flow rule in comsol? Associated or Nonassociated? Anyone can give some information about that? Thanks.

1 Reply Last Post 12 juin 2013, 05:05 UTC−4
Henrik Sönnerlind COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 12 juin 2013, 05:05 UTC−4
Hi,

In the Plasticity node under Linear Elastic you can set the 'Yield function F' to 'User defined' and write any expression of the stresses. You will then be able to select the 'Plastic potential Q' as either 'Associated' or 'User defined'. In the latter case you will then be able to supply your own flow rule.

Seeing that you have tagged 'Porous Media', it should however be noted that the Poroelastic material model not supports plasticity.

Regards,
Henrik

Hi, In the Plasticity node under Linear Elastic you can set the 'Yield function F' to 'User defined' and write any expression of the stresses. You will then be able to select the 'Plastic potential Q' as either 'Associated' or 'User defined'. In the latter case you will then be able to supply your own flow rule. Seeing that you have tagged 'Porous Media', it should however be noted that the Poroelastic material model not supports plasticity. Regards, Henrik

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.