Blar i NTNU Open på forfatter "Grammatikos, Sotirios"
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Interesting Remarks on the Comparison of Organomodified Nanomontmorillonites in Fibre-Cement Nanohybrids
Papatzani, Styliani; Grammatikos, Sotirios; Paine, Kevin (Peer reviewed; Journal article, 2020)This paper presents the effects of the addition of (i) the organomodified nanomontmorillonite (nMt) dispersion, nC2, produced for the scope of the FP7 project name FIBCEM and of (ii) the powder, undispersed organomodified ... -
Investigating the effect of accelerated aging on the mechanical properties of HDPE used in Norwegian fish farms
Wesley, James Joseph Asirvatham (Master thesis, 2020)The goal of this study is to analyse the properties of High-Density Polyethylene (HDPE) used in fish farms when subjected to various environmental factors such as sunlight, rain, moisture, and humidity experienced in the ... -
Investigating the effect of chemical aging on the mechanical properties of glass-fiber reinforced polymers
Savva, Panagiotis (Master thesis, 2023)The purpose of this study is focused around the mechanical behavior of a selection of glass reinforced polymers that undergo a four month period of chemical aging. The chosen conditions that the materials undergo represent ... -
Investigation of flax fibre in cross country ski structure
Gavric, Zoran; Leistad, Vegard (Bachelor thesis, 2020)Hvordan lage bærekraftige ski? Nedbrytbar biobasert epoxy, PMMA og petroleumsbasert epoxy ble testet med linfiber for å se om dette kunne erstatte dagens glassfiberarmerte petroleumsbasert epoxy i skiproduksjon hos Madshus. ... -
Investigation of manufacturability of grid structures of the structural part of Flying V using additive manufacturing
Haver, Bjorn (Master thesis, 2022)Bevisstheten om klimaendringer øker blant alle sektorer – inkludert luftfart. For å redusere den globale påvirkningen av luftfart, bør drivstoffbruken reduseres drastisk. TU Delft designet en ny konfigurasjon for et fly ... -
Is Hygrothermal Aging of Construction Polymer Composites a Reversible Process?
Grammatikos, Sotirios; Papatzani, Styliani; Evernden, Mark (Peer reviewed; Journal article, 2020)This paper presents the effects of wet/dry cycling loading on the moisture uptake behavior of a Fibre Reinforced Polymer (FRP) composite used in the civil engineering sector. FRP samples of various dimensions were cut from ... -
Konseptutvikling av virusfiltrerende halvmaske til helikopterpiloter
Mjelde, Ulf; Klingøy, Sigrid; Josephson, Linn Cathrin (Bachelor thesis, 2021)Som følge av covid-19-pandemien som kom til Norge tidlig i år 2020, har flere virksomheter måttet gå til innkjøp av smitteversutstyr. Norsk Luftambulanse AS er en del av den pre-hospitale helsesektoren, og er av dem som ... -
Materialegenskaper til plastmateriale for bruk i additiv formproduksjon - Undersøkelse av mekaniske og geometriske egenskaper til High Temp V2 resin
Wedding, Andreas; Hagen, Alexander Enger Wright (Bachelor thesis, 2020)Innledning: Oppgaven er en del av BIA-prosjektet «Rapid Tooling 4.0», hvor målet er å korte ned ledetiden og kostnaden ved additiv tilvirkning av sprøytestøpeformer. Materialet som skal benyttes må ha høy styrke og gode ... -
Materialgjenvinning av plastleker og blandet plast
Melleby, Martine; Dahle, Hallvard (Bachelor thesis, 2023)I Norge har vi et stort forbruk. For flere av avfallstypene, som barneleker og blandet plast, finnes det ingen gjenvinningsordning. Dette innebærer at det blir brent på et forbrenningsanlegg og ressursene forsvinner. Dette ... -
Nano-enabled polymers as embedded sensing electrodes in fibre-reinforced polymer composites
Dahl, Morten M.; Brøndbo, Vegar S. (Bachelor thesis, 2019)Polyuretan ble kombinert med nanoadditivene grafitt og karbon nanorør for å skape en elektrisk ledende elastomer, som videre ble implementert i en epoxy-karbonfiber kompositt for å gjøre bruken av karbonfiber-kompositter ... -
On the Mechanical Recycling of Decommisioned Insulation Polymer Composite Components
Grammatikos, Sotirios; Tsampas, Spyros; Papatzani, Styliani; Luping, Tang; Löfgren, Ingemar; Petterson, Jocke (Peer reviewed; Journal article, 2020)Fibre reinforced polymer composites (FRPs) are being increasingly used in aerospace and automotive applications due to their high specific mechanical properties. The construction industry has ... -
On the mechanical response of silicon dioxide nanofiller concentration on fused filament fabrication 3d printed isotactic polypropylene nanocomposites
Vidakis, Nectarios; Petousis, Markos; Velidakis, Emmanouil; Tzounis, Lazaros; Mountakis, Nikolaos; Korlos, Apostolos; Fischer-Griffiths, Peder Erik; Grammatikos, Sotirios (Peer reviewed; Journal article, 2021)Utilization of advanced engineering thermoplastic materials in fused filament fabrication (FFF) 3D printing process is critical in expanding additive manufacturing (AM) applications. Polypropylene (PP) is a widely used ... -
On the Response to Hygrothermal Ageing of Fully Recyclable Flax and Glass Fibre Reinforced Polymer Composites
Das, Subrata Chandra; Srivastava, Chaman; Goutianos, Stergios; La Rosa, Angela Daniela; Grammatikos, Sotirios (Peer reviewed; Journal article, 2023)The present work studies the response to hygrothermal ageing of natural fibre composites (NFCs) against synthetic fibre composites when using three different types of polymers as matrices. For ageing, coupons were fully ... -
On the thermal and mechanical performance of Polycarbonate / Titanium Nitride nanocomposites in material extrusion additive manufacturing
Vidakis, N.; Petousis, M.; Mountakis, N.; Grammatikos, Sotirios; Papadakis, V.; Kechagias, J.D.; Das, Subrata Chandra (Peer reviewed; Journal article, 2022)The development of cost-effective multipurpose nanocomposites with a superior mechanical response is of key importance in a variety of industries, such as the ones in the aircraft and the medical field. Such enhancement ... -
On the use of carbon nanotubes to develop durable structural electrodes for self-sensing applications
Grammatikos, Sotirios; Dahl, Morten Melby; Brøndbo, Vegar Salin; La Rosa, Angela Daniela (Peer reviewed; Journal article, 2020)This paper reports an experimental investigation on embedded polyurethane (PUR) electrodes into a carbon fibre reinforced polymer (CFRP) composite to enable the dependable use of composites as a piezoresistive sensors, ... -
ON THE USE OF HYPERSPECTRAL IMAGING FOR RAPID DETECTION OF STRUCTURAL DEGRADATION OF WOOD PLASTIC COMPOSITES DUE TO AGING
Kabir, Mohammad Shahnewaz (Master thesis, 2020)The immensely fast-growing wood plastic composite (WPC) sector presents a wide range of opportunity for utilizing waste wood, wood fiber and plastics. This recycled material has high potential ability to reduce the plastic ... -
Optimization of the filler concentration on fused filament fabrication 3d printed polypropylene with titanium dioxide nanocomposites
Vidakis, Nectarios; Petousis, Markos; Velidakis, Emmanouil; Tzounis, Lazaros; Mountakis, Nikolaos; Kechagias, John; Grammatikos, Sotirios (Peer reviewed; Journal article, 2021)Polypropylene (PP) is an engineered thermoplastic polymer widely used in various applications. This work aims to enhance the properties of PP with the introduction of titanium dioxide (TiO2) nanoparticles (NPs) as nanofillers. ... -
Permeable nanomontmorillonite and fibre reinforced cementitious binders
Papatzani, S.; Grammatikos, Sotirios; Paine, K. (Journal article; Peer reviewed, 2019)Clinker reduction in cementitious binders is of paramount importance today, and nanotechnology has extended permissible limits. In the present study, a reference binder consisting of 60% Portland cement, 20% limestone, 20% ... -
Physicochemical characterisation of bio-based insulation to explain their hygrothermal behaviour
Romano, Abbie; Grammatikos, Sotirios; Riley, Mike; Bras, Ana (Peer reviewed; Journal article, 2020)The utilisation of bio-based building materials as hygric buffers has received recent research interest due to their moisture sorption and thermal behaviours which are positive for indoor comfort. Their hygrothermal ... -
Prediction Models for Thermal Conductivity of Cement-based Composites
Hajmohammadian Baghban, Mohammad; Kioumarsi, Mahdi; Grammatikos, Sotirios (Journal article; Peer reviewed, 2018)This paper presents results from investigations on the long-term influence of concrete surface and crack orientation on ingress in cracks. Five reinforced concrete structures from Norway exposed to either de-icing salts ...