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.

How to keep the fracture aperture constant under initial in-situ stress ?

Please login with a confirmed email address before reporting spam

Hi, I am using the elastic thin layer to simulate the deformation of fractures in geomechanics due to the fluid injection. The application of the initial in-situ stress will result in a reduction in the thickness of the elastic thin layer. But in fact, it is assumed that the elastic thin layer is in a mechanically stable state under the initial stress condition, that is, the initial mechanical aperture of the elastic thin layer (or fracture) does not change unless the effective stress changes subsequently due to the increase in pore pressure. So how do I keep the initial thickness of the fracture constant under initial in-situ stress? Is it by adding a pre-deformation sub-node? But it still doesn’t work. Someone can give me some advice?

Best Regards!

Song cai


1 Reply Last Post 2018年11月27日 GMT-5 08:51
Henrik Sönnerlind COMSOL Employee

Please login with a confirmed email address before reporting spam

Posted: 6 years ago 2018年11月27日 GMT-5 08:51
Updated: 6 years ago 2018年11月27日 GMT-5 08:51

Please see the comment in https://www.comsol.com/blogs/how-to-model-adhesion-and-decohesion-in-comsol-multiphysics

Regards,
Henrik

-------------------
Henrik Sönnerlind
COMSOL
Please see the comment in 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.