Abstract: Polymeric mechanics is a rising frontier science based on polymeric physics and continuum mechanics. The research on macro and micro mechanical behavior of polymers will provide the theoretic foundation and analyzing way for increasing ductility of the polymers and for improving their formability. At present, a subject on the field is to study deformation localization development and flow character of the polymers. In this paper, a 3D expression of the back stress tensor describing oriented anisotropy p...