Blar i Fakultet for ingeniørvitenskap (IV) på forfatter "Echtermeyer, Andreas"
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Modeling and Testing of Impact Damage in Composite Pressure Vessels
Skaar, Martin Welle (Master thesis, 2015)Composite pressure vessels are becoming widely used for transporting gas, lately also hydrogen. In order to enable extensive use of the pressure vessels, it is critical to ensure their societal acceptance, and thus safety ... -
Modeling and testing of small diameter composite tubes under hydrostatic pressure
Dzubur, Emir (Master thesis, 2014)This thesis investigates the behavior of small diameter composite tubes that are exposed to external pressure. Composite tubes have a superior strength to weight ratio compared to steel tubes. The oil industry is facing ... -
MODIFISERT PAKNING FOR ARKTISKE BETINGELSER
Nergård, Katrine Linnea (Master thesis, 2015)Arktis er anslått til holde verdens største gjenværende uutnyttede olje- og gassreserver. Oljesøl utgjør en enorm risiko for arktiske økosystemer. Som et resultat av dette at er et behov for forbedret tetningsteknolgi ... -
MODIFISERT PAKNING FOR ARKTISKE BETINGELSER
Nergård, Katrine Linnea (Master thesis, 2015)Arktis er anslått til holde verdens største gjenværende uutnyttede olje- og gassreserver. Oljesøl utgjør en enorm risiko for arktiske økosystemer. Som et resultat av dette at er et behov for forbedret tetningsteknolgi ... -
Multiscale Modelling of Environmental Degradation—First Steps
Echtermeyer, Andreas; Gagani, Abedin; Krauklis, Andrejs; Mazan, Tobiasz (Chapter, 2018)Fibre-reinforced plastics are praised for their good corrosion resistance. However, when this resistance needs to be documented for safety-critical applications extensive and time-consuming test programmes are needed. A ... -
Near-Infrared Spectroscopic Method for Monitoring Water Content in Epoxy Resins and Fiber-Reinforced Composites
Krauklis, Andrejs; Gagani, Abedin; Echtermeyer, Andreas (Journal article; Peer reviewed, 2018)Monitoring water content and predicting the water-induced drop in strength of fiber-reinforced composites are of great importance for the oil and gas and marine industries. Fourier transform infrared (FTIR) spectroscopic ... -
New end fitting based on bolted joints with composite tubes
Khentalov, Vadim Alexandrovich (Master thesis, 2015)This thesis contains work on joining the GFRP pipes with metal end fitting. Professor A. Echtermeyer have proposed a concept using bolted connections. Prior to my work Master students K.Dons and A. Fossaa have developed ... -
Non-Destructive Inspection of Polymer Composite Pipelines
Bakken, Torunn (Master thesis, 2022)Rør laget av fiberforsterket komposittplast (FRP) har potensial til å erstatte metalliske i olje- og gassindustrien, grunnet deres fordelaktige egenskaper som lav vekt, høy styrke og motstand mot korrosjon. En stor hindringen ... -
Novel in-situ residual strain measurements in additive manufacturing specimens by using the Optical Backscatter Reflectometry
Wang, Shaoquan; Lasn, Kaspar; Elverum, Christer Westum; Wan, Di; Echtermeyer, Andreas (Journal article; Peer reviewed, 2020)Material extrusion (MEX) is a well established production method in additive manufacturing. However, internal residual strains are accumulated during the layer-by-layer fabrication process. They bring about shape distortions ... -
Optimize Resistance to buckling under external hydrostatic Pressure of thin walled Composite Tubes
Hugaas, Eivind (Master thesis, 2014)Composite tubes are a very good alternative to steel tubes in applications requiring low weight and high stiffness. For composite tubes to replace traditional steel tubes in demanding environments, such as in the subsea ... -
Orthotropic fluid diffusion in composite marine structures. Experimental procedure, analytical and numerical modelling of plates, rods and pipes
Gagani, Abedin; Krauklis, Andrey; Echtermeyer, Andreas (Journal article; Peer reviewed, 2018)Finite elements simulations of fluid diffusion for composite structures are becoming more common in marine and offshore applications. Input parameters for such simulations are the orthotropic diffusion constants for the ... -
Predicting multi-axial diffusion of water in laminated composite structural components
Fan, Yiming; Krauklis, Andrey, E; Gagani, Abedin; Sæter, Erik; Echtermeyer, Andreas; Muliana, Anastasia H (Journal article, 2021)This study examines the diffusion of water in fiber-reinforced polymer (FRP) laminated composites, comprising epoxy resin and unidirectional glass fibers, at different material and structural scales. Experiments on the ... -
Prediction of Orthotropic Hygroscopic Swelling of Fiber-Reinforced Composites from Isotropic Swelling of Matrix Polymer
Krauklis, Andrey; Gagani, Abedin; Echtermeyer, Andreas (Journal article; Peer reviewed, 2019)Swelling in fiber-reinforced composites is anisotropic. In this work, dealing with glass fiber epoxy composite immersed in distilled water, swelling coefficients are obtained in each direction experimentally. Swelling ... -
Producing Floor and Side Panels from Biocomposites
Zarna, Chiara (Doctoral theses at NTNU;2023:81, Doctoral thesis, 2023)High pressure laminates for floor and wall coverings mainly consist of wood fibres and resins. Such laminates are made of a high density fibre board core and several paper sheets glued to the core to obtain a decorative, ... -
Producing Steel Fiber Reinforced Polymer Composite Pipes
Tran, Daniel (Master thesis, 2016)This study has introduced a novel non-annealed stainless steel fiber with 8 $\mu m$ diameter to make a steel fiber reinforced polymer composite pipe. The primary objective was to make the pipes by the filament winding ... -
Progressive fatigue failure analysis of a filament wound ring specimen with a hole
Hugaas, Eivind; Vedvik, Nils Petter; Echtermeyer, Andreas (Journal article; Peer reviewed, 2021)A progressive FEA mechanical fatigue degradation model for composites was developed and implemented using a UMAT user material subroutine in Abaqus. Numerical results were compared to experimental strain field data from ... -
Reinforcement ability of lignocellulosic components in biocomposites and their 3D printed applications – A review
Zarna, Chiara; Opedal, Mihaela Tanase; Echtermeyer, Andreas; Chinga-Carrasco, Gary (Journal article, 2021)Biocomposites based on lignocellulosic components (e.g. pulp fibers, nanocellulose and lignin) are of interest as sustainable replacements for thermoplastic fossil-based materials, which find their application in household ... -
Requirements for Designing Moulds for Composite Components
Thorvaldsen, Nina (Master thesis, 2012)The aim with this thesis was to investigate moulds for composite production. A set of requirements needs to be established for such moulds. The requirements will then be used to find the right material and production method ... -
Residual Strength of Composite Hulls after Impact
Duus, Pål (Master thesis, 2016)Norsafe MILPRO boats operates in different waters at high speeds. The chance of hitting unknown objects e.g. floating logs is present. Being able to judge the damages and the residual strengths to these impacts are desirable. ... -
Residual Strength of Composite Pressure Vessels After Impact
Landvik, Sondre (Master thesis, 2016)Composite overwrapped pressure vessels are increasingly being applied for transportation and storage of pressurized fluids. With superior material properties, fiber-reinforced composites are central to increasing operating ...