Authors: A.A. Chernysh, S.N. Yakovlev

Title of the article: Experimental study of a dynamic module of polyurethane elastomers at reverse bending with rotation

Year: 2018, Issue: 4, Pages: 38-44

Branch of knowledge: Mechanical engineering and machine science

Index UDK: 621.888.6

DOI: 10.26730/1999-4125-2018-4-38-44

Abstract: The relevance of work is due to the need to replace the traditional elastomeric rubber material with a more advanced polyurethane, which has several advantages. The purpose of this experimental study was to study the vibration-insulating properties of modern structural polyurethanes used in the manufacture of shock absorbers. The subject of the study was the determination of the dynamic modulus of polyurethane elastomers with alternating bending with the rotation. This work describes in detail the method of measuring the dynamic modulus of elastomeric materials in strict accordance with GOST 10828-95. The dynamic modulus, measured during an experimental study, is the most important elastic characteristic of an elastomeric material that determines the deformation of the shock absorber under conditions of constant dynamic loading. The main result of the presented experimental study is the numerical values of the dynamic modulus of polyurethane elastomers of three different brands. Experimental data were obtained for loading conditions that exactly correspond to the working conditions in terms of frequency and relative deformation value. The experimental data presented show a monotonous behavior of the polyurethane elastomers under study. Small differences in the behavior of the materials under study are due to differences in the chemical structure. On the basis of the data presented, it is difficult to give preference to any of the materials studied and for a reasonable choice of the material of the shock absorber, additional research is needed.

Key words: Polyurethane elastomer shock absorber internal friction viscoelastic material dynamic module vibration-proof properties

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