Article

Received 16.08.2023

Revised 28.11.2023

Accepted 27.12.2023

Retrieved from Vol. 27, No. 3, 2023

Pages 43 -49

Gulyayev, V., & Shlyun, N. (2023). Three mechanisms of occurrence of thermal stresses and thermal destruction in elastic bodies. The National Transport University Bulletin, 27(3), 43-49. https://doi.org/10.33744/2308-6645-2023-3-57-043-049

Three mechanisms of occurrence of thermal stresses and thermal destruction in elastic bodies

Valerii Gulyayev Nataliia Shlyun

One of the main reasons that reduce the strength and durability of composite materials that work in temperature fields that vary spatially and over time is their structural heterogeneity and incompatibility of the thermomechanical parameters of their phases. The internal mechanism that arises in such situations, the continuous combination of unequal thermal displacements and thermal deformations of neighboring elements of the elastic medium, leads to the appearance of additional elastic deformations and stresses in it, which affect the thermal strength of the system. Until now, the main regularities of the manifestation of this mechanism have not been fully studied. The urgency of the problem of researching these issues becomes especially acute in connection with the development of composites with given thermomechanical parameters, in particular, with minimum values of the coefficients of their linear thermal expansion. As a rule, this goal is achieved by combining material fractions with positive and negative values of their parameters

composite material; variable temperature; thermal stress; thermal destruction; thermal strength
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https://doi.org/10.33744/2308-6645-2023-3-57-043-049