ISSN (print) 1995-2732
ISSN (online) 2412-9003


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Plastic spools that are used in metalware industry for reeling wires have flanges that are lacking in strength. Flange failures can occur as a result of wire pressure during reeling or accidental mechanical and thermal impacts during transportation and storage of spools with installed wire. Radial and ring stiffeners are normally used to strengthen the flanges. Radial and tangential stresses are traditionally believed to be the greatest (main) stresses that occur in the flanges due to the symmetry of the spool and the installed wire. Therefore, the flange stiffeners are currently designed as radial and ring stiffeners. The authors suggested that the main stresses might occur at an angle to the spool flange radius. Correspondingly, the aim of this research was to understand how the stresses tend to change at different points of the flange subjected to a variety of external loads. For analysis, the authors used some previously obtained formulas for calculating the stress state at different points of the spool flange, which is basically a thin rigid circular plate. With the help of the MathCad 15 package, the authors calculated the Mr and Mθ values and the normal stresses – i.e. radial σr and tangential σθ stresses – caused by the above moments. The following scientific results were generated through visualization of the obtained dependences as graphs: It was found that the normal circumferential stresses arising in the flange as a circular plate can have an extremum depending on the type and intensity of the load and the flange fitting; the authors explain why this is so. The main outcome of this research was a proposal to use additional stiffeners on the outboard side of the coil flange accounting for possible directions of the main stresses occurring at an angle to the radial and ring stiffeners.


Plastic spool; spool components; flexible circular plate; maximum stresses; elastic deformations.

Sergey V. Konev – PhD (Eng.), Assistant Professor

Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia

Vladimir F. Mikhaylets – PhD (Eng.), Assistant Professor

Nosov Magnitogorsk State Technical University, Magnitogorsk Russia

Ivan E. Teftelev – Head of Preproduction Department

MMK-Metiz, Magnitogorsk Russia

Aleksandr S. Fainshtein – Assistant Professor

Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia This email address is being protected from spambots. You need JavaScript enabled to view it.

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