material length scale

I hope some of you may find this work interesting, the X-FEM non-linear code developed (incorporating linear elasticity, J2 plasticity, and Strain Gradient Plasticity) can be downloaded from www.empaneda.com/codes

Gradient plasticity crack tip characterization by means of the extended finite element method

Emilio Martínez-Pañeda, Sundararajan Natarajan, Stéphane Bordas

Computational Mechanics (2017)

I hope some of you (especially those working on fracture and damage modeling) may find this work interesting:

Modeling damage and fracture within strain-gradient plasticity

http://www.sciencedirect.com/science/article/pii/S0020768315000505#