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The Geomechanics Module

Posted 14 oct. 2021, 03:04 UTC−4 1 Reply

Malgorzata Wojcik, PhD The CHEMKOP Company
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Hello,

Do I need the Geomechanics module for modeling the stress, strain, von Mises stress in rock salt? What type of material behavior I need to include in this model? The physics of the case is as follows: An underground cavern is developed in the rock salt deposit and it is used for natural gas storage under variable pressure. Strain and stress distribution is used to evaluate the cavern stability and safety. Rock salt is a creeping medium.

Thank you so much, Malgorzata

1 Reply Last Post 14 oct. 2021, 04:53 UTC−4
Henrik Sönnerlind COMSOL Employee

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Posted: 3 years ago 14 oct. 2021, 04:53 UTC−4

To find built-in models for creep, you need either the Geomechanics Module or the Nonlinear Structural Materials Module.

Alternatively, you can formulate the time-dependent creep equations yourself, using one of the mathematics interfaces (probably Domain ODEs and DAEs), and then inject the creep strains into Solid Mechanics as an External Strain. In this case the Structural Mechanics Module will suffice. This, of course, requires more work and a higher level of knowledge about the usage of the software.

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Henrik Sönnerlind
COMSOL
To find built-in models for creep, you need either the *Geomechanics Module* or the *Nonlinear Structural Materials Module*. Alternatively, you can formulate the time-dependent creep equations yourself, using one of the mathematics interfaces (probably *Domain ODEs and DAEs*), and then inject the creep strains into *Solid Mechanics* as an *External Strain*. In this case the *Structural Mechanics Module* will suffice. This, of course, requires more work and a higher level of knowledge about the usage of the software.

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.

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