Stiffened panels subjected to uniform pressure loads: theoretical and numerical modeling strategies

Platypodis, Efstathios; Πλατυπόδης, Ευστάθιος

dc.contributor.author	Platypodis, Efstathios	en
dc.contributor.author	Πλατυπόδης, Ευστάθιος	el
dc.date.accessioned	2021-01-21T07:50:25Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/52833
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.20531
dc.rights	Default License
dc.subject	Stiffened panels	en
dc.subject	Shear lag	en
dc.subject	Finite element analysis	en
dc.subject	Secondary stresses	en
dc.subject	Euler beam theory	en
dc.title	Stiffened panels subjected to uniform pressure loads: theoretical and numerical modeling strategies	en
dc.contributor.department	Shipbuilding Technology Laboratory	el
heal.type	bachelorThesis
heal.classification	Applied mechanics	en
heal.dateAvailable	2022-01-20T22:00:00Z
heal.language	en
heal.access	embargo
heal.recordProvider	ntua	el
heal.publicationDate	2021-01-08
heal.abstract	Stiffened panels are main structural components that are used in hulls of ships and in particular in double bottom, side shell and upper deck. The strength analysis of stiffened panels that are subjected to uniform pressure loads is accomplished examining both the secondary stresses, that are induced considering the stiffener with the attached plate as a beam, and the tertiary stresses, that are induced considering the bending of the plate between the stiffeners. The present thesis focuses on the study of the secondary stresses under uniform pressure loads. The Euler-Bernoulli beam theory underestimates the stress field due to the shear lag phenomenon. Both theoretical and numerical models, with finite element analysis, are examined in order to deduce about the safest strategy to examine this phenomenon. Moreover, the effect of the transverse stiffeners to the secondary stresses of longitudinal stiffeners at cross-stiffened panels is examined. For real ship scantlings, the boundary conditions, which the transverse stiffeners create, are determined. For this reason, a table is provided which relates the type of support, that the transverse stiffeners can be modeled, with other variables of a stiffened panel.	en
heal.advisorName	Anyfantis, Konstantinos	en
heal.committeeMemberName	Tsouvalis, Nicholas	en
heal.committeeMemberName	Eftaxiopoulos, Dimitrios	en
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	99 p.	en
heal.fullTextAvailability	false