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# `Akantu`: Swiss-Made Open-Source Finite-Element Library
[![joss](https://joss.theoj.org/papers/3abf3c7945cc9a016a946ce9e02e357f/status.svg)](https://joss.theoj.org/papers/3abf3c7945cc9a016a946ce9e02e357f) [![license](https://img.shields.io/badge/license-LGPLv3-green)](https://www.gnu.org/licenses/lgpl-3.0.en.html) [![readthedoc](https://readthedocs.org/projects/akantu/badge/?version=master)](https://akantu.readthedocs.io/en/latest/?badge=master)
`Akantu` means a little element in Kinyarwanda, a Bantu language. From now on it
is also an open-source object-oriented library which has the ambition to be
generic and efficient. Even though the code is written to be generic, Akantu
strength are in solid mechanics models for fracture and contact simulations.
The full documentation can be found on [ReadTheDocs](https://akantu.readthedocs.io/en/latest/)
# Building `Akantu`
## Dependencies
In order to compile `Akantu` any compiler supporting fully C++14 should work.
In addition some libraries are required:
- CMake (>= 3.5.1)
- Boost (preprocessor and Spirit)
- zlib
- Eigen3 (if not present the build system will try to download it)
For the python interface:
- Python (>=3 is recommended)
- pybind11 (if not present the build system will try to download it)
To run parallel simulations:
- MPI
- Scotch
To use the static or implicit dynamic solvers at least one of the following libraries is needed:
- MUMPS (since this is usually compiled in static you also need MUMPS dependencies)
- PETSc
To compile the tests and examples:
- Gmsh
- google-test (if not present the build system will try to download it)
### On `.deb` based systems
``` sh
> sudo apt install cmake libboost-dev zlib1g-dev gmsh libeigen3-dev
# For parallel
> sudo apt install mpi-default-dev libmumps-dev libscotch-dev
# For sequential
> sudo apt install libmumps-seq-dev
```
## Configuring and compilation
`Akantu` is a [CMake](https://cmake.org/) project, so to configure it, you can follow the usual way:
``` sh
> cd akantu
> mkdir build
> cd build
> ccmake ..
[ Set the options that you need ]
> make
> make install
```
## Using the python interface
You can install ``Akantu`` using pip, this will install a pre-compiled version:
``` sh
> pip install akantu
```
You can then import the package in a python script as:
``` python
import akantu
```
The python API is similar to the C++ one. If you
encounter any problem with the python interface, you are welcome to do a merge
request or post an issue on [GitLab](https://gitlab.com/akantu/akantu/-/issues).
# Tutorials with the python interface
To help getting started, multiple tutorials using the python interface are
available as notebooks with pre-installed version of `Akantu` on Binder. The
following tutorials are currently available:
[Plate whith a hole loaded](https://mybinder.org/v2/git/https%3A%2F%2Fgitlab.com%2Fakantu%2Ftutorials.git/HEAD?filepath=plate-hole/plate-hole.ipynb)
[Loaded cohesive crack](https://mybinder.org/v2/git/https%3A%2F%2Fgitlab.com%2Fakantu%2Ftutorials.git/HEAD?filepath=cohesive-fracture/cohesive-fracture.ipynb)
[Making your constitutive law in python](https://mybinder.org/v2/git/https%3A%2F%2Fgitlab.com%2Fakantu%2Ftutorials.git/HEAD?filepath=constitutive-laws/python_constitutive_law.ipynb)
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