Deformation and Damage of Composites with Anisotropic Components (Review).

A statistical model describing the coupled deformation and damage of composites with porous transversely isotropic and orthotropic components is proposed. The mechanism of microdamage of such composites is studied assuming that the microstrength of the material is inhomogeneous. A singlemicrodamage is modeled by an empty quasispherical pore forming in place of a microvolume damaged in accordance with the Huber-Mises failure criterion. The ultimate microstrength is assumed to be a random function of coordinates with Weibull one-point distribution density. The method of conditional moments, the damage balance equations, and the Newton-Raphson method are used to set up an algorithm to calculate the effective deformation characteristics of composite materials depending on macrostrains. The effect of the damage of the material on the macrostress-macrostrain relationship is established. The influence of the mechanical characteristics of the material, the volume fraction and porosity of its components, the geometrical parameters of its structure, and the distribution of microstrength on the damage and macrostress-macrostrain curves of the material is analyzed [ABSTRACT FROM AUTHOR]