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 ?
Posted 26.11.2018, 22:44 GMT-5 Structural & Acoustics, Geomechanics, Porous Media Flow Version 5.3a 1 Reply
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
Please login with a confirmed email address before reporting spam
Please see the comment in https://www.comsol.com/blogs/how-to-model-adhesion-and-decohesion-in-comsol-multiphysics
Regards,
Henrik
Henrik Sönnerlind
COMSOL