Question about deal.II flexibility

[Abdelrahman Elmeliegy]

Hi

I am Abdo, Ph.D. student at NC state university and was looking for a FE package library that is flexible and can be used in modeling and analyzing 2D and 3D elastic wave equation propagation within an incompressible medium. Also, at some point, I might need to add the viscoelastic behavior to the model. So, I am not sure if deal.II is flexible enough to add, modify some feature in it or not such that I can do what I have mentioned earlier. So, Can you please give me some pointers or advice regarding this?, your help is much appreciated.

Best regards.

Abdo.

[Konrad Simon]

Dear Abdo,

I do think that Deal.II can help you with solving your problem. If you are just starting with Deal.II have a look at the tutorials. It is always a good idea to start with some code basis that other people have shared and that was thoroughly tested. As to your future problem, please have a look at the code gallery as well. There are codes that other users shared dealing with visco-plastic materials, in particular (but not only Jean-Paul).

Cheers,
Konrad

[Jean-Paul Pelteret]

Dear Abdelrahman,

To add to some further details to what Konrad has already provided:

- the step-44 tutorial implements one of many incompressible elasticity formulations. There is also the Quasi-Static Finite-Strain Quasi-incompressible Visco-elasticity code gallery example that implements a linear viscoelastic model in combination with near-incompressible material behaviour.

- the Quasi-Static Finite-Strain Compressible Elasticity code gallery example implements a more traditional finite strain elasticity formulation, which could also be a basis for extension to other incompressibility formulations.

- the (new) step-71 tutorial introduces some useful techniques that can be applied to modelling complex constitutive laws. As a part of this tutorial, a magneto-viscoelastic constitutive law is implemented and verified.

If you have a look at the “Applications” tab on the top of the home page (https://www.dealii.org/), then you can see some of the libraries that are built on top of deal.II — some of these include some interesting and challenging constitutive laws. You can also look to those for inspiration on how to implement your constitutive laws within a finite element framework.

Best,

Jean-Paul

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