A constitutive model for describing the mechanical response of an amorphous glassy polycarbonate is proposed. The model is based on an isotropic elastic phase surrounded by an SO(3) continuum of plastic phases onto which the elastic phase can collapse under strain. An approximate relaxed energy is developed for this model on the basis of physical considerations and extensive numerical testing, ...

The article considers a model of plastic deformation polymer material in the inter-roll space processing equipment under conditions compression and shear, based on which it is established that all-round pressure created by working bodies causes only viscoelastic deformation, therefore compaction process its destruction does not occur. Numerical modeling waste between rolls Relo profile made pos...

On the basis of structured unified hardening model (structured UH model) considering soil collapse, time effect is take into account, and an elastic-viscous-plastic extended. In presented model, moving normal compression line (MNCL) extended to a instant (MINCL) for simulating both structure effect. Then instance plastic strains irrespective are calculated by referring MINCL, due traditional li...

The aim of this investigation was to determine the level and rate of migration of phthalates, compounds used as plastic softeners, from various plastic products into model solutions and to assess the possible adverse effects of the phthalate amounts released on human health, thus to contribute to harmonization of the opinions on the maximal allowed human exposure to these compounds through envi...

Abstract. The mechanical and damage behavior of a X100 steel after prestrain is studied in this work. Experimental results show both a plastic and rupture anisotropy: the T direction exhibits a higher ultimate stress but the lowest ductility and toughness. Prestrain reduces ductility and crack growth resistance. A model able to represent the plastic and damage behaviour of the material before a...