Mechanics

1998, No. 4

Y.N. Radayev

TO THE 50^th ANNIVERSARY OF V.I. ASTAFEV

A.V. Bylim, L.A. Saraev, V.A. Sahabiev

THE PERSICULARITIES OF TWO-COMPONENT COMPOSITE MATERIALS ELASTIC-PLASTIC DEFORMATION

In this paper the models of composite materials elastic-plastic deformation, describing nonlinear behaviour beyond the limit of elastisity are proposed. The composite materials effective characteristics are calculated. The proposed models take infe account the appearance and development of plastic yeilding zones in one of the components particular areas.

A.D. Drozdov

MODELLING PHYSICAL AGING IN GLASSY POLYMERS: 1) AN OVERVIEW OF PHENOMENOLOGICAL MODELS

A survey is presented of mathematical models for structural relaxation in glassy polymers. The first part of this review deals with phenomenological constitutive relations. The emphasis is on volume recovery in amorphous polymers after thermal treatment. Physical models for structural relaxation in disordered media will be the subject of the other part of this work.