Browsing NTNU Open by Author "Goutianos, Stergios"
Now showing items 1-20 of 30
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A design methodology of a Product: Bicycle frame for simultaneous improvement of mechanical and environmental performance
Khalil Ullah, Md Ibrahim (Master thesis, 2022)For tiden kan avanserte materialer kombinere høye mekaniske egenskaper med tilleggsegenskaper, for eksempel lettvekt, resirkulerbarhet eller andre funksjoner. I mange bransjer gir bruken av lette materialer som kompositter ... -
Assessment of long-term performance of natural fibre reinforced polymer composites with recyclable polymer matrices under different environmental ageing conditions
Das, Subrata Chandra (Doctoral theses at NTNU;2024:167, Doctoral thesis, 2024)The usage of natural fibre composites (NFCs) has been increasing recently to replace traditional composite materials in different sectors due to climate change and sustainability issues. However, natural fibres are ... -
Biomimicking nacre-like structure to develop stiff and tough polymer composites by using multi-material 3D printing technology
Ahad, Jubair Ahmed (Master thesis, 2022)For å oppnå spesifikke og høyytelsesfunksjoner, er avanserte multi-material kompositter nå mye brukt. Seighet-styrke kan opprettholdes ved å designe og utvikle kompositter med kontrollert mikrostruktur. Naturen har utviklet ... -
Carbon-Nano Fibers Yield Improvement with Iodinated Electrospun PVA/Silver Nanoparticle as Precursor via One-Step Synthesis at Low Temperature
Gea, Saharman; Attaurrazaq, Boy; Situmorang, Suhut Alexander; Piliang, Averroes Fazlur Rahman; Hendrana, Sunit; Goutianos, Stergios (Peer reviewed; Journal article, 2022)High temperature is required in carbon fiber synthesis in the carbonization step. However, direct high-temperature heating without the presence of additive materials would affect the yield and structure of carbon fibers ... -
Cohesive-zone models and singularities at corners and cracks in homogeneous materials
Thouless, M. D.; Goutianos, Stergios (Peer reviewed; Journal article, 2022)The stress singularities at corners in elastic bodies are not strong enough to provide a driving force for fracture, except in the limit of a crack. Here, we re-examine these elastic stresses from the perspective of ... -
A coupled mix-mode cohesive law based on a cylindrical potential function
Erives, R.; Sørensen, B.F.; Goutianos, Stergios (Peer reviewed; Journal article, 2022)A novel mixed-mode cohesive law derived from a potential function is presented. The potential function is formulated using physical parameters that can be extracted from any fracture mechanics test capable of providing ... -
Effect of accelerated weathering on the performance of natural fibre reinforced recyclable polymer composites and comparison with conventional composites
Das, Subrata Chandra; La Rosa, Angela Daniela; Goutianos, Stergios; Grammatikos, Sotirios (Peer reviewed; Journal article, 2023)This work investigated the long-term performance of unidirectional (UD) flax fibre reinforced recyclable polymer composites (FFRPs), after accelerated weathering for a total of 56 days, in laboratory environment. The ... -
Experimental investigation of the path-independent fracture of composites
Goutianos, Stergios (Peer reviewed; Journal article, 2021)Cohesive zone modelling is the main tool to solve the problems of crack initiation and growth, and therefore several mixed-mode cohesive laws are being developed. The majority of the cohesive laws are path independent ... -
Extraction of mix-mode cohesive laws of a unidirectional composite undergoing delamination with large-scale fibre bridging
Erives, Ruben; Sørensen, Bent F.; Goutianos, Stergios (Peer reviewed; Journal article, 2022)A novel method is proposed for extracting the mixed-mode cohesive laws of composite materials undergoing delamination with large-scale fibre bridging. In the approach, the mixed-mode cohesive laws are derived from a potential ... -
Facile synthesis of ZnO–Ag nanocomposite supported by graphene oxide with stabilised band-gap and wider visible-light region for photocatalyst application
Saharman, Gea; Situmorang, Suhut Alexander; Pasaribu, Nurhaida; Piliang, Averroes FR; Attaurrazaq, Boy; Sari, Reka Mustika; Pasaribu, Khatarina Meldawati; Goutianos, Stergios (Peer reviewed; Journal article, 2022)The synthesis of zinc oxide (ZnO), with the support of silver (Ag) and Graphene Oxide (GO), was carried out in several stages as a potential photocatalytic material. First, the GO was synthesized from commercial graphite ... -
Fatigue Crack Growth Rate at Material and Geometry Transitions in Glass-Epoxy Composites
Goutianos, Stergios; Sørensen, Bent F. (Peer reviewed; Journal article, 2021)An element test specimen with ply drops, intended to be representative of a composite structure of varying thickness such as the main laminate in a wind turbine rotor blade structure, is used to investigate the fatigue ... -
Finite element modelling of indentation testing in an AA1050 microstructure
Goutianos, Stergios; Pan, Hongjiang; Zhang, Xiaodan (Peer reviewed; Journal article, 2022)Heterogeneous microstructures can be produced in structural metals from heterogeneous deformation, and they can also be purposely designed to meet specific requirements in high-demanding engineering applications. When ... -
Fracture resistance dataset of composites under mixed-mode non-proportional loading
Goutianos, Stergios (Peer reviewed; Journal article, 2021)Cohesive zone modelling is one of the main tools to simulate fracture of materials and structures. As a result a number of cohesive laws are being developed continuously. In most cases, due to experimental challenges, the ... -
Frittstående bøyekonsept med fornybar strømtilførsel for subseainstallasjoner.
Maier, Justin; Torgerhagen, Even Hansen; Jevne, Thord (Bachelor thesis, 2022)Målet med dette prosjektet har vært å undersøke muligheten for å utvikle et frittstående bøyekonsept med fornybar energi for undervannsinstallasjoner. Dersom konseptet realiseres vil oppdragsgiver, og eventuelt andre, spare ... -
Implementering av digitale verktøy for feilsøking og utbedring av lekkasje på en pelton - injektor
Vatlestad, Stian Offerdal; Vingli, Rune; Tesli, Daniel Slapø (Bachelor thesis, 2022)Denne bacheloroppgaven omhandler implementering av digitale verktøy for feilsøking og utbedring av lekkasje på en pelton – injektor. Fokus på digitalisering i vannkraftsektoren har økt betraktelig de siste årene. Konkurranse ... -
The Influence of Processing Temperature on the Tensile Properties of Melt-Spun PLA Fibres and their Self-Reinforced Composites
Goutianos, Stergios; Beauson, Justine (Peer reviewed; Journal article, 2023)The temperature during the consolidation of self-reinforced PLA composites has a significant effect on their mechanical properties. In the present work, the effect of the consolidation or processing temperature on the ... -
Jacking Device for Load Testing of Lifting Points
Ullebust Almklow, Bjarte; Linn, Sigmund; Pedersen, Åse Helgeland (Bachelor thesis, 2024)Problemstillingen til dette prosjektet er å designe og utvikle et system som er i stand til å belastningsteste løfteører på undervannsstrukturer for OneSubsea. Systemet, kalt "Local PadEye Angular Load Tester" (LPALT), er ... -
Kaldflytpressing QForm
Øvregard, Sondre; Andreassen, Evert Hatlehol (Bachelor thesis, 2023)Steertec benytter i dag SINTEF til å utføre simuleringer for sine produksjonsprosesser. I denne oppgaven blir det undersøkt om det er mulig for Steertec å bruke programmet QForm til å utføre disse simuleringene selv. ... -
Kirigami inspired shape programmable and reconfigurable multifunctional nanocomposites for 3D structures
Arnaud, Kernin; Leonardo, Ventura; Aaron, Soul; Kan, Chen; Weibang, Lu; Pietro, Steiner; Coskun, Kocabas; Dimitrios, Papageorgiou; Goutianos, Stergios; Han, Zhang; Emiliano, Bilotti (Peer reviewed; Journal article, 2022)The ability to shape and program remotely and contactlessly from two-dimensional (2D) flat multilayer materials into three-dimensional (3D) structures and functional devices could be ideal for applications like space ... -
Machine Learning and Computational Micromechanics Models for Multifunctional Cementitious Composites Reinforced by Graphene Derivatives: Mechanical and Functional properties
Montazerian, Arman (Doctoral theses at NTNU;2024:284, Doctoral thesis, 2024)Cementitious composites (CCs), which include cement paste, mortar, and concrete, are widely used around the world, second only to water. They are essential for sustainable construction due to their wide availability, ...