Keyword: «composite materials»

The article briefly describes the issue of joint application of wooden reinforcement and concrete in decision-making in the field of restoration of structures used in railway bridges. Practice and experience of wide distribution of joint use of various materials at production of the reinforced concrete and designs from them. Construction of composite wood-concrete elements from local materials. Deformative properties and degree of adhesion of reinforcement with concrete.

A study of the problem of developing effective methods for predicting the determining characteristics of composite materials and structures under the influence of extreme environmental factors has been conducted. The formulated problems are investigated within the framework of refined variational formulations of inverse forecasting problems based on modern provisions of the kinetic theory of strength. A methodology for matching the parameters of mathematical and physical models at micro- and macro-levels has been developed, which made it possible to solve the problem of restoring the parameters of physical and chemical processes occurring at the micro-level and leading to destructive changes in composites and deterioration of their characteristics over time. An objective assessment of the parameters of destructive chemical reactions in composites based on the conducted physical experiments made it possible to construct effective generalized models of durability for a long-term period, as well as to conduct a constructive analysis of the influence of individual extreme factors on the durability of composites.

Promising ways of expanding potential opportunities in improving the efficiency of methods for predicting the defining characteristics of composites (residual life, strength, durability) under extreme conditions are investigated. The study of modifications of the methods of searching for the global extremum of multiparametric functions, taking into account the structural features of the efficiency criteria used in the tasks of forecasting the defining characteristics of composite materials and structures made of them. One of the promising ways to increase potential opportunities is analyzed, associated with the improvement of methods for constructing optimal directions for finding the minimum of efficiency indicators associated with solving the problems of predicting the residual life of polymer composites under the influence of extreme factors.

This article provides an overview of studies on the study of uneven aging of polymer composite materials under the influence of ultraviolet (UV) radiation. In general, the current state of research indicates that exposure to UV radiation can have a significant effect on the properties of glass-basalt composites based on epoxy resin, including changes in surface chemistry, mechanical properties, and appearance. However, further research is needed to fully understand the underlying mechanisms responsible for these effects and develop effective strategies to reduce them. The design and manufacture of a UV camera for testing glass and basalt plastics is an important aspect of studying the effects of UV radiation on these materials.