Recent Commits
Commit | Author | Details | Committed | ||||
---|---|---|---|---|---|---|---|
5d59f1e9dcfa | pastewka | CMAKE: Add Boost include dirs. | Mar 8 2018 | ||||
11c0d515472f | D163 | pastewka | CMAKE: Fixes for generating XCode project files - add all headers, updated… | Feb 26 2018 | |||
79e5558183fb | D163 | pastewka | Merge branch 'master' into feat/apple | Feb 26 2018 | |||
4a33d5ec6b0a | D163 | pastewka | - Updated documentation of Field, FieldCollection and FieldMap. - Updated CMake… | Feb 26 2018 | |||
1fe880c12733 | D162 | junge | Removed the FieldCollection alias | Feb 24 2018 | |||
2f84baf3e899 | junge | Efficient logm and const correctness bug in MaterialMuSpectre fixed | Feb 22 2018 | ||||
1d0dc43a82d1 | junge | Compatibility with gcc 5.4 | Feb 22 2018 | ||||
aeb858290a83 | D161 | RLeute | Included a material with distribution of stiffness properties | Feb 21 2018 | |||
b3f3772f45b1 | D160 | pastewka | CMAKE: macOS compatibility | Feb 20 2018 | |||
ca1b0d7feb88 | pastewka | CMAKE: Fixes for macOS clang + homebrew. | Feb 20 2018 | ||||
997734e596fd | junge | documentation typo | Feb 15 2018 | ||||
611b1715be57 | junge | documentation | Feb 15 2018 | ||||
440ddf01f4d5 | junge | minimum showable documentation | Feb 15 2018 | ||||
77accd3313b6 | junge | small unicode fix | Feb 14 2018 | ||||
82b4f36e72a3 | junge | Started the tutorial | Feb 14 2018 |
README
µSpectre
Copyright © 2018 Till Junge
µSpectre is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3, or (at your option) any later version.
µSpectre is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
This README contains only a small quick start guide. Please refer to the full documentation for more help.
Building µSpectre
µSpectre is a CMake project that uses C++14. It depends on the Boost unit test framework for testing and uses uses python3 as secondary API. You will need a modern C++ compiler (µSpectre was tested with gcc-6 , gcc-7, clang-4 and clang5) and CMake version 3.7.0 or higher.
Compilation
$ git clone https://c4science.ch/source/muSpectre.git $ cd build $ cmake -DCMAKE_BUILD_TYPE=Release .. $ make
µSpectre makes use of expression templates, as a result, production code must be compiled with the CMAKE_BUILD_TYPE flag set to Release in order to get performance (under gcc, non-optimised code is about 50 times slower than the release). Be careful with parallel compilation: compiling µSpectre is quite memory-hungry because of the use of expression templates, a parallel make -j requires currently about 10 GB of RAM under GCC.
Simple usage example
The following is a simple example for using µSpectre through its convenient Python interface
#!/usr/bin/env python3 import numpy as np import muSpectre as µ # setting the geometry resolution = [51, 51] center = np.array([r//2 for r in resolution]) incl = resolution[0]//5 lengths = [7., 5.] formulation = µ.Formulation.small_strain # creating the periodic cell rve = µ.SystemFactory(resolution, lengths, formulation) hard = µ.material.MaterialLinearElastic1_2d.make( rve, "hard", 10e9, .33) soft = µ.material.MaterialLinearElastic1_2d.make( rve, "soft", 70e9, .33) # assign a material to each pixel for i, pixel in enumerate(rve): if np.linalg.norm(center - np.array(pixel),2)<incl: hard.add_pixel(pixel) else: soft.add_pixel(pixel) tol = 1e-5 cg_tol = 1e-8 # set macroscopic strain Del0 = np.array([[.0, .0], [0, .03]]) if formulation == µ.Formulation.small_strain: Del0 = .5*(Del0 + Del0.T) maxiter = 401 verbose = 2 solver = µ.solvers.SolverCG(rve, cg_tol, maxiter, verbose=False) r = µ.solvers.newton_cg(rve, Del0, solver, tol, verbose) print("nb of {} iterations: {}".format(solver.name(), r.nb_fev))
You can find more examples using both the python and the c++ interface in the bin/ and tests folder.