For the minimization the black box solver Nomad 3.8.1 was utilized.
- Rolland Delorme, Patrick Diehl, Ilyass Tabiai, Louis Laberge Lebel, and Martin Lévesque. Extracting constitutive mechanical parameters in linear elasticity using the virtual fields method within the ordinary state-based peridynamic framework. Journal of Peridynamics and Nonlocal Modeling, Jan 2020. Link, Preprint
The code is licensed under the GNU General Public License v3.0 developed by Rolland Delorme and Patrick Diehl.