Abstract
The aim of this research was to experimentally study the property degradation of a glass-fiber plastic with increasing temperature and the features of its mechanical behavior. A glass-fiber plastic of aerospace design based on a fabric of volumetric weave from a K11C6170-BA silica thread and an EDT-10P epoxy binder was investigated. The results of tensile tests performed using a technique harmonized with domestic and foreign methods for testing GFRP specimens at temperatures of 22, 100, 175, 250, and 300oC are presented. Their deformation diagrams are obtained, and values of the basic mechanical characteristics are determined. Relations describing the degradation of the elasticity modulus, the tensile strength, Poisson ratio, and the strains corresponding to the strength limit with increasing temperature are constructed and analyzed. Features of the mechanical behavior of the composite material are discussed; in particular, the nonlinear change in strength and qualitative changes in the types of deformation diagrams with growing temperature, which are associated with changes in deformation and fracture mechanisms. An analysis of degradation of glass-fiber plastic structures after the tests at normal and increased temperatures is performed based on data found with the use of a stereomicroscope
Published Version
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