Determining the mechanical characteristics of composite materials reinforced with woven preforms

Reduction of the complexity production articles from composite materials is largely ensured by use reinforcing semi-finished products in which fibers pre-form a framework. Among all variety systems, woven sleeves (preforms) occupy special place. The high degree deformability nonimpregnated condition makes it possible to lay this reinforcement on any surface without folds and cuts that provide preservation strand continuity. This advantage accompanied change local angles and, consequently, variable nature physical mechanical characteristics curved part surface. A method for calculating based preforms at point depending pattern laying strands has been developed. possibility application rod model describe material with was analyzed. essence consists modeled diamond-shaped system. rhombus sides serve as diagonals binder. To verify theoretical results substantiate practical recommendations, series experimental studies were performed formation specimens two types different angles. study program included tensile, bending, compression tests. fairly good convergence data obtained. For example, square correlation coefficient not less than 0.95 modulus elasticity, 0.8 Poisson's ratio, 0.9 tensile compressive strengths. rationale using considered class composites. developed procedure will make increase perfection designs obtain rational parameters process their manufacture.