Experimental & Numerical Investigation of Oil and Gas Pipe Strengthening with CFRP Composites under Extreme Cyclic loading

Σκαράκης, Ιωάννης; Skarakis, Ioannis

dc.contributor.author	Σκαράκης, Ιωάννης	en
dc.contributor.author	Skarakis, Ioannis	el
dc.date.accessioned	2017-03-08T08:29:28Z
dc.date.issued	2017-03-08
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/44559
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.5736
dc.description	Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Ναυτική και Θαλάσσια Τεχνολογία και Επιστήμη”	el
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Cyclic loading	en
dc.subject	CFRP	en
dc.subject	Fatigue life	en
dc.subject	Failure	en
dc.subject	Pipe	en
dc.subject	Σωληνώσεις	el
dc.subject	Διάρκεια ζωής	el
dc.subject	Αντοχή	el
dc.subject	Σύνθετα υλικά	el
dc.subject	Κόπωση	el
dc.title	Experimental & Numerical Investigation of Oil and Gas Pipe Strengthening with CFRP Composites under Extreme Cyclic loading	en
heal.type	masterThesis
heal.classification	Structural Mechanics	en
heal.dateAvailable	2018-03-07T22:00:00Z
heal.language	en
heal.access	embargo
heal.recordProvider	ntua	el
heal.publicationDate	2016-06
heal.abstract	Maintenance of pipelines and piping system is continuously being improved in order to ensure their operation and integrity. New materials such as FRP composites have been introduced for the rehabilitation of piping systems. The present study investigates the mechanical response of reinforced pipe elbows with composite material CFRP subjected to low-cyclic fatigue. A set of experiments is conducted supported by finite element analyses. The experiments were performed in the Shipbuilding Technology Laboratory of the School of Naval Architect and Marine Engineering, National Technical University of Athens, while computational simulation followed by the Abaqus software. The structure of this thesis is divided into five chapters. The first chapter offers an extended reference of the emerge of pipelines and piping in oil and gas industry. Moreover, it presents the failure modes of pipelines and the advanced technological means for identifying the damage. In addition a presentation of the mechanical response of pipe elbow is given. A brief report of academic research related to pipe elbow failure is also included. The second chapter associated with composite materials and matrices with respect to their composition, their production, their mechanical response and their advantages in various fields of applications. Moreover, the importance of rehabilitation of pipelines with FRP is given. In the third chapter a detailed description of the experimental procedure is given. In this procedure, there is a reference to the construction phase and the proper preparation of test specimens before strengthening by CFRP. Finally, experimental results are presented. In the fourth chapter, finite element analyses are performed in order to estimate the mechanical response of the reinforced and unreinforced pipe elbows subjected to lowcyclic fatigue. Finally comparison results between the experimental and numerical results are given. The fifth and last chapter of the thesis presents the conclusions of this research. Moreover a summary of possible future research actions is given.	en
heal.advisorName	Τσούβαλης Νικόλαος	el
heal.committeeMemberName	Τσούβαλης Νικόλαος	el
heal.committeeMemberName	Καραμάνος, Σπύρος	el
heal.committeeMemberName	Σαμουηλίδης Εμμανουήλ	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών	el
heal.academicPublisherID	ntua
heal.numberOfPages	130 σ.	el
heal.fullTextAvailability	true