PSI - Issue 59

Andrii Babii et al. / Procedia Structural Integrity 59 (2024) 609–616

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Andrii Babii et al. / Structural Integrity Procedia 00 (2019) 000 – 000

reproduces the change of contact pressure along the width of the bandage by hyperbolic cosine and trigonometric cosine in the circular direction; the model of the effect of internal pressure and the weight of the working fluid takes into account the degree of the tank filling; the model of interaction between the supports and the cylindrical tank makes it possible to set constant or variable pressure by the width of the support or its wrapping angle, using the hyperbolic cosine function. The models of the loading components are developed into trigonometric Fourier series and are consistent with the theory of slope shells of Timoshenko type, making it possible to determine the stress-strain state of the investigated shell as a whole. According to the calculation of the stressed state of small-sized sprayer tank under the loading described above, it is determined that the operating internal pressure of 0.2 MPa provokes equivalent stresses of 79.2 MPa in the tank walls; while transporting liquid by the sprayer ( 0 0 p  ), the stress state of the shell is significantly influenced by its supports, and even assuming the constant contact pressure between the support and the cylindrical part of the shell, a significant increase in stresses in the support boundary areas is observed. Similar effect is observed in the boundary areas when the tank is tightened with bandages. Therefore, in order to make the most efficient use of the supporting surfaces when fastening the tank and to distribute the contact pressure effectively in the contact area, such surfaces should have variable stiffness. If we consider supports, these are elements of variable thickness. Under such conditions, it will be possible to avoid the increase in stresses in the boundary contact areas. At the same time, the tightening of the shell to the supports plays the role of stiffening ribs which strengthen the shell and reduce the risk of its failure under the influence of internal excess pressure. References Andreikiv, О.E., Babii, А.V. , Dolinska, І.Yа. , 2020. Influence of the Working Media and Maneuvering Loading Mode on the Service Life of Spraying Booms of Field Sprinklers. Materials Science 56, 166 – 173. Andreykiv, O., Babii, A., Dolinska, I., Yadzhak, N., Babii, M., 2022. Residual lifetime prediction of field sprayer booms under the action of manoeuvre loading and corrosive environment. Procedia Structural Integrity 36, 36-42. Babii, A., Dovbush, T., Khomuk, N., Dovbush, A., Tson, A., Oleksyuk, V., 2022. Mathematical model of a loaded supporting frame of a solid fertilizers distributor. Procedia Structural Integrity 36, 203-210. 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