Numerical Investigations of the Influence of Seismic Vibrations on the Transformer Structure

Duda, Sławomir; Kciuk, S.; Gniłka, Jacek; Kaszyca, Tomasz

doi:10.1007/978-3-030-04975-1_20

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…In case of designing buildings or mechanical structures, special attention should be paid to their safety regulations. The Huber–Mises reduced stress is a measure of security and should be lower than the permissible one [3]. If any physical phenomenon is repeated cyclically for a long time, then the fatigue life is important and should be taken into account due to the decreasing fatigue strength [4], especially when designing machines or mechanical devices.…”

Section: State Of the Artmentioning

confidence: 99%

Modelling of Guillotine Cutting of a Cold-Rolled Steel Sheet

Kaczmarczyk

2019

Materials

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In this paper, the modelling of a cutting process of a cold-rolled steel sheet using a symmetrical cutting tool is presented. The fast-changing nonlinear dynamic cutting process was elaborated by means of the finite element method and the computer system LS-DYNA. Experimental investigations using scanning electron microscopy were performed and the results are presented in this work. The numerical results were compared with experimental ones. The comparison shows a good agreement between the results obtained by means of numerical modelling and those received from experimental investigations. The numerical simulations of the cutting process and the experimental investigations aimed to understand the mechanism of the cutting process. They serve as a highly professional tool for carrying out research investigating the behavior of complex nonlinear fast-changing dynamical cutting processes in the future.

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Section: State Of the Artmentioning

confidence: 99%

Modelling of Guillotine Cutting of a Cold-Rolled Steel Sheet

Kaczmarczyk

2019

Materials

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“…It should be highlighted that the designing of the cutting process is in contradiction of very common safe designing of e.g., machines [3][4][5][6], various mechanical constructions with repeating cyclically fatigue strength [7], composite-based materials [8,9], etc. The mentioned safe designing consisted mainly in gaining lower stress or equal to the permissible one [10]. In cutting techniques, the stress should exceed the permissible one; otherwise, the cutting could not be possible [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Modelling of the Guillotine Cutting Process by Means of a Symmetrical Blade with the Defined Geometry

Kaczmarczyk¹

2020

Materials

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This paper modelled the cutting process of a bundle consisted of ultra-thin cold-rolled steel sheets using a guillotine. The geometry of a cutting tool with given dimensions was assumed. A bundle of sheets being cut was modelled as deformable, the cutting tool was rigid, and the finite element method along with computer system LS-DYNA was employed. Numerical simulations of the complex state of stress and of the corresponding complex state of strain were carried out. Cutting processes belong to fast changing physical phenomena, and therefore, highly nonlinear dynamical algorithms were applied in order to solve this particular problem. Experimental investigations were also conducted by means of the scanning electron microscopy. It was found that the fracture region consisted of two distinct zones: brittle and ductile separated from each other by the interfacial transition. Morphological features of the brittle, ductile, and the transition regions were identified. The ductile and brittle zones were separated at the depth of ca. 1/5 thickness of the cut steel sheet. Finally, the numerical results obtained by usage of the finite element method as well as experimental ones in the form of microscopic images were compared, showing quite good agreement.

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