Experimental Study of the Sleeve Material Mechanical Properties during the Sample Tensile Test

Abstract

Composite materials are widely used in various industries. Both ordinary household items and specialized equipment used, in particular, in emergency and rescue formations, are made from them. Each equipment has a different level of reliability. One of the types of such equipment with the lowest level of reliability is fire hoses. Fire hoses work under different internal working pressures, and depending on this indicator, during their manufacture, such materials are chosen that are able to withstand it. High-pressure fire hoses are a separate type of fire hoses. In order to ensure the necessary strength of the material, it includes an internal reinforcing layer, which is a weaving of textile threads or metal wire. The composite structure of the material greatly complicates the process of checking the technical condition of high-pressure fire hoses, which may have hidden defects. These defects can cause their destruction during operation and lead to non-fulfillment of the tasks assigned by units of emergency and rescue formations. Therefore, the study of changes in the properties of the composite material from which high-pressure fire hoses are made due to the influence of various factors on it is relevant.

Determining the influence of an artificial defect on the mechanical properties of a flexible pipeline material during a rupture test

“…In order to predict the behavior of materials from which flexible pipelines are made from various factors that affect them during their work, it is necessary to conduct research into their physical and mechanical properties. Several authors [2][3][4][5][6][7][8][9][10][11][12][13][14][15] report these studies. The study of the physical and mechanical properties of pressurized fire hoses under the influence of various factors is complicated by the fact that the material from which they are made is composite and anisotropic.…”

“…In [10], the stiffness and modulus of elasticity of the material of a high-pressure fire hose type 1 ST with a diameter of 19 mm were investigated. The limit loads that act on the material of a high-pressure fire hose when testing it for rupture, as well as the relative elongation of the material at the same time, are established.…”

“…The study of the physical and mechanical properties of pressurized fire hoses under the influence of various factors is complicated by the fact that the material from which they are made is composite and anisotropic. In [10][11][12][13][14][15], studies of changes in the characteristics of the physical and mechanical properties of the material from which pressure fire hoses are made as a result of external influences on it were carried out. Some of them [14,15] consider the study of the physical and mechanical properties of samples of pressure fire hoses of the «T» type, which had an internal diameter of 77 mm with existing material damage.…”