Elastic is a simple yet efficient finite element solver for linear elasticity problems in two and three dimensions.
you will need to install the ISCD Commons Library on your system. Please refer to the instructions provided on the ICS Commons Library page in order to install this library.
download the zip archive of LinearElasticity or clone this repository:
git clone https://github.com/ISCDtoolbox/LinearElasticity.git
navigate to the downloaded directory:
then create build directory and create Makefile
mkdir build cd build cmake .. make make install
After compiling elastic as described above, you should have an executable file in your $HOME/bin directory. If your PATH variable is correctly set to this directory, elastic can be called with the following syntax:
usage: elastic [+/-v | -h] [-n nit] [-r res] [-t typ] source_file[.mesh] [-p param_file[.elas]] [-s data_file[.sol]] [-o output_file[.sol]]
The square braces indicate optional arguments. Some commands have flags, some others do not.
The options and flags are:
--help show the syntax and exit. --version show the version and date of release and exit. -n nit number of iterations max for convergence -r res value of the residual (Krylov space) for convergence -t typ specify the type of FE space: 1: P1, 2: P2 -v suppress any message (for use with function call). +v increase the verbosity level for output. source_file.mesh name of the mesh file param_file name of file containing elasticity parameters data_file.sol name of file containing the initial solution or boundary conditions output_file.sol name of the output file (displacement field)
A full description of all parameters and options that can be specified in the command line or in a parameter file [file.elas] can be found in the project wiki.
You can test the installation and look at examples by entering the demos directory and running the program:
cd demos/2d elastic carre.mesh # or equivalently: elastic carre.mesh -p carre.elas -o carre.sol
that will produce an output that will look like:
user:~/code/LinearElasticity/demos/2d$ elastic carre - ELASTIC, Release 5.0c, Jan.19, 2016 (C) Copyright 2006- , ICS-SU - LOADING DATA carre.mesh: 5663 vertices, 257 edges, 11067 triangles carre.elas: 4 conditions - COMPLETED: 0.024s ** MODULE ELASTIC: 5.0c Matrix and right-hand side assembly Solving linear system: 9.236327E-07 in 2983 iterations ** COMPLETED: 6.954s - WRITING DATA carre.sol: 5663 data vectors - COMPLETED: 0.012s ** Cumulative time: 6.990s.
Authors & contributors
- elastic has been initiated by Maya de Buhan (Université Paris Descartes) and Pascal Frey (Université Pierre et Marie Curie). Current team includes Charles Dapogny (Université Joseph Fourier), Chiara Nardoni (Université Pierre et Marie Curie) and Loic Norgeot (Université Pierre et Marie Curie).
- Contributors to this project are warmly welcomed.
elastic is given under the [terms of the GNU Lesser General Public License] (LICENSE.md).