### The solution of a scientific task with this sortware

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Good day!

My name is Victor Nachev. I am faced with the scientific task of building 3D mechanical rock model with dimensions 30x30x60 mm which consists of grains with different minerals and grain's geometry close to the real like in nature and dimensions about 10-1000 nm. After building the model I need to fill grains with their mechanical properties and boundary conditions and study propagation of mechanical fractures in the model in tests with different types of loading.

My questions are the next:

1.Does this software allow to build a 3D mechanical model with 1-100 millions cells?

2. Does this software allow to assign mechanical properties and boundary conditions to each cell?

2.1. If the answer "yes" in the question 2, what mechanical properties and boundary conditions are needed for this software to initialize a model?

3. Does this software can build a mesh for such model?

4. Does this software allow to do different tests such as compression and tensile tests?

5. Does this software allow to calculate fracture propagation in such model?

Best regards,

Victor Nachev.

My name is Victor Nachev. I am faced with the scientific task of building 3D mechanical rock model with dimensions 30x30x60 mm which consists of grains with different minerals and grain's geometry close to the real like in nature and dimensions about 10-1000 nm. After building the model I need to fill grains with their mechanical properties and boundary conditions and study propagation of mechanical fractures in the model in tests with different types of loading.

My questions are the next:

1.Does this software allow to build a 3D mechanical model with 1-100 millions cells?

2. Does this software allow to assign mechanical properties and boundary conditions to each cell?

2.1. If the answer "yes" in the question 2, what mechanical properties and boundary conditions are needed for this software to initialize a model?

3. Does this software can build a mesh for such model?

4. Does this software allow to do different tests such as compression and tensile tests?

5. Does this software allow to calculate fracture propagation in such model?

Best regards,

Victor Nachev.

Community: FEniCS Project

### 2 Answers

3

You could have put a little bit more research into the FEniCS project before asking these questions.

After only skimming the first few pages of the Tutorial it should be clear that FEniCS provides general purpose tools for the approximate solution of (systems of) partial differential equations using the finite element method, and not what you have asked.

You will not find mechanical properties, material models, crack propagation models, and not even a balance of linear momentum implemented for you like you are probably used to by commercial software. If you are not willing to develop a mathematical description of your problem by yourself but rather want to use predefined models, FEniCS is certainly not the right tool for you.

But follow the tutorial and see for yourself what FEniCS is about.

After only skimming the first few pages of the Tutorial it should be clear that FEniCS provides general purpose tools for the approximate solution of (systems of) partial differential equations using the finite element method, and not what you have asked.

You will not find mechanical properties, material models, crack propagation models, and not even a balance of linear momentum implemented for you like you are probably used to by commercial software. If you are not willing to develop a mathematical description of your problem by yourself but rather want to use predefined models, FEniCS is certainly not the right tool for you.

But follow the tutorial and see for yourself what FEniCS is about.

1

Hi Victor.

I'm reserching in geomechanics also and I think the software suitable for you is Ansys. It has modules for geomaterials and modules for fractures.

Still you need to learn finite elements before you understand how to set up your model as you want to. There are no short cuts in this kind of analysis.

Good luck with your research!!!

I'm reserching in geomechanics also and I think the software suitable for you is Ansys. It has modules for geomaterials and modules for fractures.

Still you need to learn finite elements before you understand how to set up your model as you want to. There are no short cuts in this kind of analysis.

Good luck with your research!!!

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