dc.contributor.author |
Ζαβερδινός, Γεώργιος
|
el |
dc.contributor.author |
Zaverdinos, Georgios
|
en |
dc.date.accessioned |
2022-07-01T08:32:43Z |
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dc.date.available |
2022-07-01T08:32:43Z |
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dc.identifier.uri |
https://dspace.lib.ntua.gr/xmlui/handle/123456789/55351 |
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dc.identifier.uri |
http://dx.doi.org/10.26240/heal.ntua.23049 |
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dc.description |
Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Υπολογιστική Μηχανική” |
el |
dc.rights |
Default License |
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dc.subject |
Ανθρακόνημα |
el |
dc.subject |
Θραυστομηχανική |
el |
dc.subject |
Σύνθετα υλικά |
el |
dc.subject |
Πεπερασμένα στοιχεία |
el |
dc.subject |
Μηχανική συνεχούς μέσου |
el |
dc.subject |
FEA |
en |
dc.subject |
Fracture |
en |
dc.subject |
Composites |
en |
dc.subject |
Pullout |
en |
dc.subject |
Carbon fiber |
en |
dc.title |
Μελέτη πεπερασμένων στοιχείων για τη θερμική υποβάθμιση των μηχανικών ιδιοτήτων της ενδιαμέσου φάσης μεταξύ ίνας ανθρακονήματος και θερμοπλαστικής μήτρας |
el |
dc.title |
Computational study of temperature dependent fiber/matrix interfacial debonding in CFRPs |
en |
heal.type |
masterThesis |
|
heal.classification |
Finite Elements |
en |
heal.classification |
Πεπερασμένα Στοιχεία |
el |
heal.classification |
Θραυστομηχανική |
el |
heal.classification |
Fracture Mechanics |
en |
heal.language |
en |
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heal.access |
campus |
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heal.recordProvider |
ntua |
el |
heal.publicationDate |
2021-10-22 |
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heal.abstract |
The study showcases the importance of thermal effects in the fiber/matrix interface degradation in a carbon fiber reinforced polymer. The objective of the present thesis is to effectively investigate the impact of elevated interface temperature on facilitating easier separation of the constituent materials in 3d printed unidirectional composites, towards an efficient CFRP recycling approach.
The methodology is established on the numerical simulation of a pullout experiment with the Finite Element Method. Appropriate elasticity theories and fracture relations are adopted and applied in 3D single fiber and multifiber finite element Virtual Crack Closure Technique (VCCT) models. The phenomenon is divided into a crack initiation phase, approached with the quadratic failure criterion, and a crack propagation phase – approached with the Benzeggagh Kennane criterion.
The target quantities include stress and strain contours for the progression of the crack, as well as Energy Release Rates (ERRs) and work required to achieve separation. The ultimate goal is to prove the significance of elevated temperature and then suggest specific temperature conditions for the pullout separation. This goal is implemented successfully in the present work.
Furthermore, the effect of the development of an additional crack is studied quantitatively, along with the impact of the presence of neighboring fibers. The study results indicate that additional cracks developed during the pullout process, favor quicker and less energy demanding separation, and that the presence of neighboring fibers in the model increases energy and time requirements. |
en |
heal.advisorName |
Χαριτίδης, Κωνσταντίνος |
el |
heal.committeeMemberName |
Χαριτίδης, Κωνσταντίνος |
el |
heal.committeeMemberName |
Καβουσανάκης, Μιχαήλ |
el |
heal.committeeMemberName |
Παπαδόπουλος, Γεώργιος |
el |
heal.academicPublisher |
Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Χημικών Μηχανικών |
el |
heal.academicPublisherID |
ntua |
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heal.numberOfPages |
98 σ. |
el |
heal.fullTextAvailability |
false |
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