The Classification of Methods of Defining of Calculated Mechanical and Physical Characteristics of Composite Materials

Abstract

A short description with the analysis of the choice of the equivalent characteristics of the material with the further classification of the casting method is represented in this article. The choice and definition of elastic characteristics of composite materials depend on a number of factors: they are the geometry of the estimated element of the construction, the stress-strained state and the mathematical model of this state, the calculation method, the final precision of the solution. The technical methods of calculation of such elements as rods, shells and plates are analytically connected with the resolving equation set-up. One of the most widely used approaches to the solution of practical tasks is to transform heterogeneous materials to homogeneous ones, either isotropic or orthotropic. The most common variants of the choice of physical and mechanical characteristics of the composite material are discussed in this article. One limitation is introduced, that is the work in the elastic strain range and the fulfillment of the conditions of the strain compatibility of the reinforced matrix. These limitations are in accordance with the security of the work of the constructions. A high-quality formulae analysis depending on the final task is given in the article. The given formulae analysis for defining the effectiveness of physical and mathematical characteristics of composite rods, plates and shells enables to make calculations for more complicated tasks. A structural scheme of methods of defining of characteristics of composite materials is given.