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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2011, 2 (2), P. 71–75

SIMULATION OF ELASTIC AND PLASTIC PROPERTIES

OF POLYMERIC COMPOSITES WITH SILICATE

LAMELLAR NANOFILLER

Polymer/silicate nanocomposites mechanical behaviour under finite deformation is investigated at structural level. Outcomes of computer simulation are presented. Nano-filler particles are modeled represented as sheaves from the several parallel ultrathin silicate plates parted by beds of polymer (tactoids), a matrix – as a nonlinear-elastic or elastoplastic material.

The stress-strain state round separate inclusion in dependence on its orientation to a exterior load direction and properties of a matrix is researched. The problem of the macro-homogeneous elongation of a periodic cell in the form of the rectangular field with a tactoid at centre has been solved for this purpose. Conditions at which afiller particle losses of a bending stability happens in the course of macroelongation of material are defined.

The estimate of nanocomposite macro mechanical behaviour depending on properties of a matrix, filler

concentration and orientation of corpuscles is spent on the basis of the gained solutions. Appropriate dependencies between macro and micro-structural parameters associations are built.

Keywords: elastic and plastic properties, polymeric composites, silicate lamellar nanofiller.