**5. Conclusions**

The analysis of the dynamic properties of the Perzyna model of viscoplasticity (implicit time, non-local) generalized using fractional calculus (explicit, stress-fractional, non-local) leads to the following conclusions:


• Induced plastic anisotropy of the fractional model should be regarded not only in the classical sense as directional deformation but also as directional viscosity, which results in directional dispersive character.

The above results are fundamental from the point of view of modeling strain localization and damage phenomena. Both these aspects will serve as a base for future studies.

**Author Contributions:** All of the authors have contributed to the writing of this paper. They read and approved the manuscript.

**Funding:** The National Science Centre, Poland under Grant No. 2017/27/B/ST8/00351.

**Acknowledgments:** This work is supported by the National Science Centre, Poland under Grant No. 2017/27/B/ST8/00351.

**Conflicts of Interest:** The authors declare no conflict of interest.
