Numerical Prediction of the Elastic and Strength Properties of Woven Composites

The article is devoted to the development of the procedure for the numerical determination of effective elastic constants and parameters of the strength criterion of woven composites based on known properties of the matrix and fibers. The mechanical characteristics of carbon plastics were obtained by numerical analysis of the stress-strain state of a representative volume using finite element software package ANSYS. A series of numerical experiments is performed in which a local stress state of a representative volume is modeled under the conditions of a uniform average stress state of an equivalent homogeneous material. Requirements of periodicity are used as boundary conditions. The calculations are performed for tension and compression in two directions, shears in two planes and two tensions simultaneously in two directions. For composites all the parameters of the quadratic strength criterion are determined. The proposed criterion takes into account the orthotropy of the material and the differences in the tension and compression strengths.