plastisoijia
Plastisoijia is a theoretical concept in materials science referring to a proposed coupling between plastic deformation and isotropic response within certain polymeric or composite materials. The term is a portmanteau of plastic and isotropy, intended to describe a material behavior where the onset of plastic flow and the hardening state are governed by an effectively isotropic yield criterion, despite underlying microstructural anisotropy. In this framework, the yield surface expands or contracts uniformly in all directions in stress space as plastic strain accumulates, analogous to isotropic hardening, but with a microstructure that may exhibit direction-dependent properties.
Origin and usage: The term plastisoijia emerged in theoretical discussions and some speculative modeling studies to
Models and characteristics: Proponents describe plastisoijia with a constitutive equation where the plastic strain rate is
Limitations: Critics point out the lack of experimental evidence and potential incompatibility with known anisotropic hardening
See also: Plasticity, Isotropy, Yield criterion, Constitutive modeling, Anisotropy.