PSI - Issue 59

Viktoriia Ihnatieva et al. / Procedia Structural Integrity 59 (2024) 487–493 Viktoriia Ihnatieva / Structural Integrity Procedia 00 (2019) 000 – 000

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parameter is a complex function of the degree of filling, as it determines the value of the permeability coefficient, and the degree of filling of the braid layer. Fig. 3 shows the dependence of the maximum pressure on the degree of filling and relative depth of pre impregnation of the braid layer. The graph shows that the pressure increases rapidly with increasing degree of filling. At a high filling degree, it reaches a value commensurate with the shear strength of the fibres.

Fig. 3. Pressure dependence at the final moulding of the profile on the degree of filling and pre-impregnation of the braiding layer

4. Conclusions. The basic physical processes occurring at the final moulding of rod products of complex profile made of composite materials have been investigated. It is established that under the action of forces in the moulding process the processes of binder filtration in the interfibre space play a determining role. The basic theoretical dependences for establishing the relationship between the structural parameters of the product material and the force parameters of the pultrusion process have been obtained. On this basis, a methodology for calculating pressures inside the forming device during the moulding of any profile with given structural and technological parameters is proposed. References Bochkarev, S. V., Hymervert, D. A., 1988. Filtration of polymer binder in the process of winding products from composite materials. Mekhanika kompozitsionnykh materialov 6, 116-120. Buketov, A., Maruschak, P., Sapronov, O., Zinchenko, D., Yatsyuk, V., Panin, S., 2016. Enhancing performance characteristics of equipment of sea and river transport by using epoxy composites. Transport 31(3), 333 - 342. Freger, G. E., Aptekar, M. D., Ihnatiev, B. B., Chesnokov, V. V., Melikbekyan, A. H., Kostrub V. А., 2004. Fundamentals of Mechanics and Technology of Composite Materials, Kyiv, pp. 524. Freger, G. E., Ihnatiev, B. B., Melikbekyan, A. H., Kolesnikov, A. V., Aptekar, M. D., 1998. Mechanics of composite materials. Lugansk, 139. Gribanov, Y. A., Gurin, I. V., Gujda, V. V., Bukolov, A. N., Kolosenko, V. V., 2020. Study on corrosion properties of carbon-carbon composites. Voprosy Atomnoj Nauki i Tekhniki, 154-160. Ihnatieva, V. B., Hud, M. I., 2021. Peculiarities of work of profile products from composite materials in building constructions located in seismic areas. Mosty ta tuneli: teoriya, doslidzhennya, praktyka 20, 19-25. Vyshniakov, L.R., 2014. Kompozytsiyni materialy. Entsyklopediya suchasnoyi Ukrayiny: onlayn versiya, Kyiv, URL: https://esu.com.ua/article 4385.