Abstract
The object of research is wood composites. The aim of the work is to develop a reliable method for predicting the durability of wood composites operating under mechanical loading and climatic aging.
The research methodology is based on the provisions of the thermo-fluctuation theory of fracture of a solid. The strength is evaluated by long-term mechanical transverse bending tests before and after aging. Climatic aging is simulated in thermal and UV chambers.
The change in the value of the thermal fluctuation constants after aging as a result of the destruction of composites has been established. Empirical equations are obtained for predicting the durability of wood composites by the duration of accelerated aging. A graphic-analytical method for determining the coefficients of new equations is described. A method for calculating a correction that takes into account the change in the value of thermal fluctuation constants after aging is shown. The correction is introduced into the well-known equations of the thermofluctuation theory to predict the durability. A method has been developed for predicting the durability of wood composites taking into account their aging. Approbation of the technique on the example of accelerated aging of plywood showed a high convergence of the results with experimental data on aging.
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Mamontov, S., Mamontov, A., Monastyrev, P., Emelianov, S., Pahomova, E. (2023). Aging and Long-Term Mechanical Impact in the Durability of Wood Composites. In: Vatin, N., Pakhomova, E.G., Kukaras, D. (eds) Modern Problems in Construction. Lecture Notes in Civil Engineering, vol 287. Springer, Cham. https://doi.org/10.1007/978-3-031-12703-8_7
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