Influence of Geometric Parameters of Conical Acrylic Portholes on Their Stress–Strain Behaviour

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dc.contributor.authorKochanov, Vladimircs
dc.contributor.authorPíštěk, Václavcs
dc.contributor.authorKondratiev, Andriics
dc.contributor.authorYuresko, Tetyanacs
dc.contributor.authorKučera, Pavelcs
dc.coverage.issue5cs
dc.coverage.volume14cs
dc.date.accessioned2022-03-14T11:53:31Z
dc.date.available2022-03-14T11:53:31Z
dc.date.issued2022-03-05cs
dc.description.abstractTranslucent elements in the form of truncated cones, which are made of organic glass, are widely used in the structures of portholes, submersible vessels, space vehicles, pressure chambers, teleboxes and other types of technical equipment. The decisive factor in designing portholes is to ensure the strength of their translucent elements. In order to reduce the weight of portholes and, accordingly, to increase the payload, it is necessary to optimise the geometric parameters of the translucent elements, which include the tapering angle and the ratio of thickness to radius of the smaller base. The paper deals with development of the applied (engineering) method for determining the stress–strain behaviour of the conical translucent elements of portholes made of organic glass under the action of a uniform hydrostatic pressure. Finite-element modelling of the translucent element of the conical porthole is performed, with the calculation of its stress–strain behaviour. External hydrostatic pressure of 10 MPa, absence of loads from the inside and continuous sliding of the translucent element with friction along the conical supporting surface of the porthole metal body are the boundary conditions for the computational model. Full-scale tests of translucent elements of portholes made of organic glass were performed under the action of uniform hydrostatic pressure. Analysis of the influence of geometric characteristics of the portholes on stress–strain behaviour showed that the increase in the tapering angle at the constant relative thickness of the translucent element reduced its axial displacement in all cases. Equivalent stresses acquire minimum values when the tapering angle is in the range from 75° to 105° (when the relative thickness increases, the optimal tapering angle becomes smaller). It is shown that the developed method for determination of the stress–strain behaviour of the conical translucent elements of portholes made of organic glass reflects the real picture of deformation and agrees with the results of full-scale tests. Results of the work allow us to choose the rational parameters of the translucent element for increasing the reliability of portholes through the creation of an effective distribution of stresses and strains in the translucent element, and improving its optical characteristics due to a relatively small deflection in operation.en
dc.formattextcs
dc.format.extent1-15cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPolymers. 2022, vol. 14, issue 5, p. 1-15.en
dc.identifier.doi10.3390/polym14051041cs
dc.identifier.issn2073-4360cs
dc.identifier.other176973cs
dc.identifier.urihttp://hdl.handle.net/11012/203963
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofPolymerscs
dc.relation.urihttps://www.mdpi.com/2073-4360/14/5/1041cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2073-4360/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectorganic glassen
dc.subjectpolymethyl methacrylate plasticen
dc.subjecttranslucent elementen
dc.subjecthydrostatic loaden
dc.titleInfluence of Geometric Parameters of Conical Acrylic Portholes on Their Stress–Strain Behaviouren
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-176973en
sync.item.dbtypeVAVen
sync.item.insts2022.04.21 08:51:49en
sync.item.modts2022.04.21 08:14:14en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav automobilního a dopravního inženýrstvícs
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