This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as long as the
header is not suppressed.

This program is distributed in the hope that it will be useful,
but without any warranty; without even the implied warranty of
merchantibility or fitness fora particular purpose. See the
GNU General Public License for more details.

If using this code for research or industrial purposes please cite:
E. Martnez-Paeda, S. Natarajan, S. Bordas. 
Gradient plasticity crack tip characterization by means of the extended
finite element method. Computational Mechanics (2017)
doi:10.1007/s00466-017-1375-6

Run Input.m to see an example of crack tip characterization by means of
X-FEM and strain gradient plasticity

Do not hesitate to contact me at mail@empaneda.com if you have any
further doubts