The theory of non-linear hardening of an elastoplastic composite material filled with ideally elastic inclusions

A version of the statistiad method of averaging the system of equilibrium equations for an elastoplastic two-component composite material in order to predict its macroscopic non-linear hardening is proposed. This version, unlike the averaging method developed previously in [l, 2], enables one to model and estimate the degree of connectedness of the matrix and the inclusions and to take into account the non-uniformity of the distribution and the development of plastic deformations. Macroscopic governing equations are constructed which describe the non-linear hardening of a composite material outside the elasticity limit, and its effective characteristics are calculated.     

Scale factor in an experimental model of a highly reinforced composite

Formation of shrinkage defects during isothermal curing of network polymers is considered. The cure was carried out under conditions of adhesive interaction of the polymer matrix with the rigid filler present in the composite. The dependence of the relative mean distance between cohesive defects on the tube diameter in the tube model developed earlier was investigated over more than two orders of magnitude of tube diameters. This distance was found to be constant in the range considered. A similar process of shrinkage defect formation was observed for a plate model.Presented at the Ninth International Conference on the Mechanics of Composite Materials (Riga, October 1995).Translated from Mekhanika Kompozitnykh Materialov, Vol. 31, No. 2, pp. 163–168, March–April, 1995.The work was financed by the Russian Fund for Basic Research (Project 94-03-09253).     

Mechanical properties of a composite with a carbonized matrix

The effect of reinforcement schemes that differ in the magnitude of the disorientation angle of neighboring filler layers on the mechanical properties of a "carbon-carbon" composite under extension, compression, or bending is shown.Translated from Mekhanika Polimerov, No. 2, pp. 235–240, March–April, 1976.