Structural design of filament wound composite pressure vessels for naval applications

Χατζηπλή, Αικατερίνη; Chatzipli, Aikaterini

dc.contributor.author	Χατζηπλή, Αικατερίνη	el
dc.contributor.author	Chatzipli, Aikaterini	en
dc.date.accessioned	2024-02-02T09:21:20Z
dc.date.available	2024-02-02T09:21:20Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/58749
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.26445
dc.rights	Default License
dc.subject	Composite Materials	en
dc.subject	Pressure Vessels	en
dc.subject	Naval Applications	en
dc.title	Structural design of filament wound composite pressure vessels for naval applications	en
heal.type	bachelorThesis
heal.classification	Υλικά	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2023-03-12
heal.abstract	This Diploma thesis is focused on the structural design of composite filament wound pressure vessels and their naval applications. As environmental regulations have been requiring more and more energy saving and eco-friendly material technology, the demand for lighter weight technology of naval applications has caused an increased use of composite materials. Those materials are widely used also for the construction of submersibles, such as pressure vessels, which participate heavily in the naval industry and the most sufficient manufacturing method for such structure is filament winding. Based on this literature background, this research focuses on the structural design of two case studies of filament wound composite pressure vessels, composed with different geometries, load cases and requirements. These two case studies will be numerically modeled in ABAQUS and tested, using the finite element analysis, in order to optimize their structural characteristics and mechanical behavior. An initial design is given for each case study, accompanied with the material choice of a filament wound composite, geometrical limitations and loads. The purpose of this research is to determine the optimal combination characteristics, so that the two cases will be able to withstand not only linearly but also under nonlinear circumstances. Those characteristics are the material properties, the stacking sequence and the minimum adequate total thickness – hence, the thickness of the plies as well – of the composite tubes. The pressure vessels of those case studies are constructed with flat metal end cups connected to the composite cylinder through an adhesive joint for the first one and with hemispherical composite domes for the second one. Furthermore, the failure criterion chosen for the case studies is the Hashin’s Criterion, adapted to Safety Factors derived from the Bureau Veritas Regulations. For each case study, a parametric analysis is carried out based on its numerical model under linear circumstances, so that it will be clear how much each characteristic of the structure influences the results. After that, if the results indicate that the pressure vessel is likely to fail, the initially proposed characteristics change, with the aim to enhance its ability to withstand the applied load. Finally, a nonlinear analysis is performed, in order to determine whether the model requires to be enhanced even more.	en
heal.advisorName	Τσούβαλης, Νικόλαος	el
heal.committeeMemberName	Ανυφαντής, Κωνσταντίνος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Θαλάσσιων Κατασκευών. Εργαστήριο Ναυπηγικής Τεχνολογίας	el
heal.academicPublisherID	ntua
heal.numberOfPages	70 σ.	el
heal.fullTextAvailability	false