POWER CHARACTERISTICS FLEXIBLE METAL SLEEVES WHEN BENDING

Abstract

The bending stiffness of flexible metal sleeves depends on the properties of the material, the geometric parameters of the corrugated shell, the design parameters of the wire braid and operational factors (pressure in the sleeve, the bending radius of the sleeve). The results of experimental and computational studies of the power characteristics of 48 serial flexible metal hoses with internal diameters from 6 to 40 mm of various designs, at different values of internal pressure, different schemes and bending methods, different bending radii are presented. Hysteresis loops were constructed and analyzed at different values of the operating pressure inside the GMR. It is established that the typical force characteristic as the sleeve is loaded during bending consists of three regions: the first region is characterized by "soft" nonlinearity, the second region is an almost linear deformation region, the third region is a "hard" force characteristic, described by a semicubic parabola. A method for calculating the bending stiffness of metal hoses is developed, a comparison of calculated and experimental stiffness values is given.