Adhesive joining of metal end-caps to composite pressure vessels

Ζερβού Κορίνα; Zervou, Korina

dc.contributor.author	Ζερβού Κορίνα	el
dc.contributor.author	Zervou, Korina	en
dc.date.accessioned	2023-05-05T09:52:39Z
dc.date.available	2023-05-05T09:52:39Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/57640
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.25337
dc.rights	Default License
dc.subject	Adhesive joint	en
dc.subject	Pressure vessel	en
dc.subject	Composite material	en
dc.subject	Finite Element Analysis	en
dc.subject	Κολλητός σύνδεσμος	el
dc.subject	Δοχείο πίεσης	el
dc.subject	Σύνθετα υλικά	el
dc.subject	Ανάλυση πεπερασμένων στοιχείων	el
dc.title	Adhesive joining of metal end-caps to composite pressure vessels	en
heal.type	bachelorThesis
heal.classification	Material science	en
heal.classification	Structural analysis	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2023-03-16
heal.abstract	The use of composite materials is becoming increasingly wider in marine industry due to their light weight, high strength and corrosion resistance, leading to energy-saving structures. In parallel, the application of the adhesive joints, instead of conventional bolted or welded connections, is gaining great interest especially in structural components made of fiber-reinforced composites. This joining method is preferred since it offers the possibility of joining dissimilar materials, prevents from local damage of fibers and introduction of stress concentrations, traditionally caused by the fastener holes. Additional advantages like the water-tightness of an adhesively bonded structure and the possibility of on the spot maintenance, without need of dry docking, make the adhesive joining even more desirable in the field of composite pressure vessels used for underwater applications. The efficient design of a composite pressure vessel, including an adhesive joint between a composite cylinder and a metal end-cap, is a challenging task. It combines the difficulty in understanding composite materials structural behavior, due to their anisotropic nature, the limited literature and lack of design rules regarding complicated adhesive joint configurations. Moreover, since the analysis of the mechanical behavior of the composite cylinder and the adhesive joint constitute two separated issues, structural analyses, including both issues, from literature are hard to find. In the context of this work, the design of the adhesive joint configuration between a filament wound pressure vessel and aluminum end-caps is examined, resulting in a series of proposed design concepts. Afterwards, the finite element modelling of the proposed designs of the pressure vessel with the adhesively attached aluminum end-caps is investigated under hydrostatic pressure, using ABAQUS software. The first finite element model simulates a 10° slice of the half of the pressure vessel, using 3D solid elements. It is used for a linear static analysis, focusing on the adhesive joint area. The dominant failure mode and its location are determined. Since this slice model is cost-saving, a parametric study is conducted in order to examine the effect of geometry, stacking sequence and material properties variation. The conclusions of the parametric study are applied in the model in order to optimize the structural design and minimize the risk of failure. The second finite element model simulates the full cylindrical structure, including the composite cylinder, the metal parts and the adhesive joints between them, using 3D solid elements. It is used for validating the results of the corresponding slice model, for conducting an eigenvalue buckling and a nonlinear buckling analysis. The latter is crucial for the final optimization as it is closer to real-life conditions. Following the whole study, the optimized design in terms of structural reliability, functionality and manufacturing feasibility is reached.	en
heal.advisorName	Tsouvalis, Nicholas	en
heal.advisorName	Carrere, Nicolas	en
heal.committeeMemberName	Anyfantis, Konstantinos	en
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Θαλάσσιων Κατασκευών	el
heal.academicPublisherID	ntua
heal.numberOfPages	120 σ.	el
heal.fullTextAvailability	false