METHOD FOR DETERMINING MECHANICAL CHARACTERISTICS OF RODS FROM POLYMER COMPOSITE MATERIALS, AND DEVICE FOR ITS IMPLEMENTATION (VERSIONS)

摘要

FIELD: machine building.;SUBSTANCE: method for determining mechanical characteristics of rods from polymer composite materials involves loading of horizontally installed specimen with incremental load, recording of load value and corresponding deformation of specimen, and calculation of values of mechanical characteristics; at that, specimen in the form of a rod of constant cross section with hinged ends is subject to longitudinal bending by means of longitudinal loading; longitudinal load value and corresponding values of bend deflection and curvature radius in maximum deflection zone (Version 1) or longitudinal load value and corresponding approximation value of specimen ends in axial direction (Version 2) is recorded; longitudinal loading is continued to the beginning of specimen destruction, stress σ, deformation e and elasticity modulus E is determined by formulas. Device for determining mechanical characteristics of rods from polymer composite materials by longitudinal bending, which includes horizontal base, movable hinge support installed on it with possibility of horizontal movement and fixed force-measuring assembly installed on it and including vertical post fixed on the base; the post is equipped in upper part with a hinge with a bracket suspended on it, on which, on the side facing movable support, there arranged is fixed hinge support, and on the opposite side there located is loading tip contacting the force-measuring sensor arranged on vertical post. At that, seats for installation of specimen in movable and fixed hinge supports, loading tip and force-measuring sensor are coaxial (located on one and the same line); movable support is equipped with loading mechanism, for example, electric motor with reduction gear, and bend deflection and curvature radius measuring sensors (Version 1) are installed between movable support and force-measuring assembly or movable support is equipped with movement sensor (Version 2).;EFFECT: improving accuracy for determining mechanical characteristics of rods from polymer composite materials.;4 cl, 4 dwg