About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Rashit A. Kayumov , doctor of physical and mathematical sciences, professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Farid R. Shakirzyanov, Candidate of physical and mathematical sciences, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Linur R. Gimranov, Candidate of technical sciences, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Aivaz R. Gimazetdinov, post-graduate student, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it |
| Title of the article | Determination of the characteristics of a viscoelastic fiberglass model based on the results of bending square section pipes |
| Abstract. | Problem statement. The paper presents the results of experiments on three-point bending of tubular samples made of pultrusion composite, one of the simplest variants of the creep core during shear of this material is proposed, a method for identifying the characteristics of this core by solving direct and inverse problems of deformation of beams in the form of thin-walled pipes is developed. The shear characteristics of the proposed viscoelastic model obtained by this method are presented and the calculated and experimental results are compared. The purpose of the study is to develop a methodology for determining the shear characteristics of a viscoelastic model of fiberglass deformation based on the results of experiments on three–point bending of thin-walled pipes. To achieve it, it was necessary to perform the following tasks: experiments, choose a variant of the relations of the hereditary theory of elasticity, develop a method for solving the direct problem of bending beams taking into account transverse shear and, based on it, develop a method for solving the inverse problem to determine shear characteristics. Results. Experiments on three-point bending of square-section pipes have been carried out. A method is proposed for identifying the characteristics of the creep core during shear of composite materials reinforced unidirectionally, based on solving direct and inverse problems of deformation of thin-walled pipes made of the material under study. Conclusions. The significance of the obtained results lies in the fact that the mechanical characteristics of the viscoelastic model for pultrusion fiberglass obtained by the proposed method of their identification make it possible to obtain a good agreement of the results of analytical calculations with experiments. Both the test procedure and the identification method are quite simple to use in practice. The resulting model of the hereditary theory of elasticity allows us to evaluate the effect of viscoelastic deformations on the stress-strain state of fiberglass elements. |
| Keywords. | fiberglass, viscoelastic model, bending, mechanical characteristics, identification. |
| For citations: | R.A. Kayumov, F.R. Shakirzyanov, L.R. Gimranov , A.R.Gimazetdinov, Determination of the characteristics of a viscoelastic fiberglass model based on the results of bending square section pipes //News KSUAE 2022 №2 (60), p.37-44, DOI: 10.52409/20731523_2022_2_37, EDN: BYHQBR |
