Buckling and ultimate strength study of a stiffened plate under compression using finite element method

Panagiotopoulos, Vasilis; Παναγιωτόπουλος, Βασίλης

dc.contributor.author	Panagiotopoulos, Vasilis	en
dc.contributor.author	Παναγιωτόπουλος, Βασίλης	el
dc.date.accessioned	2021-01-08T07:47:30Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/52738
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.20436
dc.description	Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Ναυτική και Θαλάσσια Τεχνολογία και Επιστήμη”
dc.rights	Default License
dc.subject	Marine structures	en
dc.subject	Buckling	en
dc.subject	Stiffened plate	en
dc.subject	Ultimate strength	en
dc.subject	Finite Element Method	en
dc.title	Buckling and ultimate strength study of a stiffened plate under compression using finite element method	en
heal.type	masterThesis
heal.classification	Marine Structures	en
heal.dateAvailable	2022-01-07T22:00:00Z
heal.language	en
heal.access	embargo
heal.recordProvider	ntua	el
heal.publicationDate	2020-11-03
heal.abstract	Hull is mainly composed by a continuous system of frames, plates, stiffeners and girders. Overall failure of a ship’s hull is governed by buckling and plastic collapse of the deck, bottom or side shell stiffened plates. Hence, is crucial to accurately calculate the ultimate strength of those elements. Regulations and guidelines concerning structural integrity of a ship and buckling of its structural components are typically based on text book formulas, modified to take into consideration different buckling modes, interaction between elements, nonlinear behavior etc. This type of approach has limitations concerning complex structural problems. Limitations concerning complex interactions, geometry or loads, could overcome by using Finite Element Method. The task of this work is to study the buckling and ultimate strength of an isolated stiffened plate and an isolated stiffened plate’s element (stiffener and attached plating), as parts of a ship’s deck, under compressive loading conditions, which results from the sagging of the hull, using Finite Element Method. The boundary conditions of an isolated structural element of deck (stiffened plate, stiffened plate’s element) should represent realistically the behavior of that element as part of the construction. The appropriate boundary conditions for an isolated stiffened plate model were obtained by monitoring displacements on the boundaries of a stiffened plate on the deck of a hull model subjected to longitudinal bending. Those boundary conditions used in the finite element analysis of an isolated stiffened plate model, so that conclusions about collapse mode, ultimate strength, stress distribution and load distribution among stiffened plate’s elements to be made. Similarly, the appropriate boundary conditions for an isolated stiffened plate’s element were obtained through a stiffened plate model subjected to uniaxial compression, by monitoring the displacements on its elements’ boundaries. The obtained boundary conditions used in the finite element analysis of an isolated stiffened plate’s element model, so that conclusions about collapse mode, ultimate strength and stress distribution to be made along with a comparison between shell and cubic elements. Using evidences acquired from the study of the aforementioned models, evaluated whether is it possible or not, to predict the buckling behavior of a stiffened plate through the analysis of just one of its elements. This work fulfilled using Abaqus 6.14	en
heal.advisorName	Samuelides, Manolis	en
heal.committeeMemberName	Anyfantis, Konstantinos	en
heal.committeeMemberName	Tsouvalis, Nicholas	en
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	107 σ.	en
heal.fullTextAvailability	false