Blar i NTNU Open på forfatter "Echtermeyer, Andreas"
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Dissolution kinetics of R-glass fibres: Influence of water acidity, temperature, and stress corrosion
Krauklis, Andrey; Gagani, Abedin; Vegere, Kristine; Kalnina, Ilze; Klavins, Maris; Echtermeyer, Andreas (Journal article; Peer reviewed, 2019)Glass fibres slowly degrade due to dissolution when exposed to water. Such environmental aging results in the deterioration of the mechanical properties. In structural offshore and marine applications, as well as in the ... -
Dissolving Cylinder Zero-Order Kinetic Model for Predicting Hygrothermal Aging of Glass Fiber Bundles and Fiber-Reinforced Composites
Krauklis, Andrey; Echtermeyer, Andreas (Chapter, 2018)Glass fibers and fiber-reinforced composites degrade when exposed to water. Understanding the dissolution behaviour of glass in fiber-reinforced composites is necessary to predict the changes in physical and mechanical ... -
Effect of artificial aging on Mode I delamination properties of composites with an [0/90] interface
Guttormsen, Trym (Master thesis, 2023)Masteroppgaven er skrevet i samarbeid med Norges teknisk-naturvitenskapelige universitet (NTNU) i Trondheim, med Andreas Echtermeyer som veileder. Målet med arbeidet og oppgaven er å få en bedre forståelse av hva slags ... -
The effects of the van der Waals potential energy on the Young’s modulus of a polymer: comparison between molecular dynamics simulation and experiment
Sahputra, Iwan Halim; Echtermeyer, Andreas (Journal article, 2021)Molecular dynamics simulation were employed to investigate the effect of changing the potential energies describing primary and secondary bonds on the Young’s modulus of a polymer. The energies were changed by arbitrarily ... -
Elastomer viscoelasticity and performance of seals in coldclimate applications
Akulichev, Anton (Doctoral theses at NTNU;2017:295, Doctoral thesis, 2017)The Ph.D. thesis addresses the issues of elastomer seals operating in cold climate areas like Arctic. The work is devoted to a better understanding of low-temperature behaviour of elastomer seals near the glass transition ... -
Embedded optical fibres for monitoring pressurization and impact of filament wound cylinders
Sæter, Erik; Lasn, Kaspar; Echtermeyer, Andreas; Nony, Fabien (Journal article, 2018)Filament wound composite pressure vessels have found use throughout many industries for storing high-pressure gases. The ability to investigate the vessels for possible damage from accidental impact loads is important for ... -
Environmental Aging of Constituent Materials in Fiber-Reinforced Polymer Composites
Krauklis, Andrejs (Doctoral theses at NTNU;2019:215, Doctoral thesis, 2019)Fiber-reinforced polymer (FRP) composites have seen a rapid rise in use in the past 50 years due to their high strength, stiffness, relatively light weight and relatively high corrosion resistance, especially when compared ... -
Estimating SN curves for local fiber dominated fatigue failure in ring specimens representing filament wound pressure vessels with damage
Hugaas, Eivind; Echtermeyer, Andreas (Peer reviewed; Journal article, 2021)Modeling the effect of fatigue is important for predicting remaining life of damaged filament wound composite pressure vessels. This study shows how S-N curves can be measured that describe local fiber dominated fatigue ... -
Evaluation of Antifreeze Coatings to prevent icing on Arctic Offshore Structures
Toreskås, Oda Lunde (Master thesis, 2013)Icing of operating structures in the Arctic areas causes difficulties for ships and offshore drilling units. The large amount of accreted ice on these structures can make the ship turn over, and makes the work both challenging ... -
EVALUATION OF THE STRAIN FIELD IN A COMPOSITE – METAL ADHESIVE JOINT WITH AN OPTICAL BACKSCATTER REFLECTOMETER
Grave, Jon Harald Lambert; Håheim, Magnus Lund; Echtermeyer, Andreas (Chapter; Peer reviewed, 2012)Knowing the strains and stresses in an adhesive joint is critical for the understanding and proper modeling of adhesive joints. To find a good method for measuring this has been a part of the work done by FP7 Co-Patch ... -
Experimental verification of the elastic response in a numeric model of a composite propeller blade with bend twist deformation
Rokvam, Sondre Østli; Vedvik, Nils Petter; Mark, Lukas; Rømcke, Eivind; Ølnes, Jon; Savio, Luca; Echtermeyer, Andreas (Journal article; Peer reviewed, 2021) -
Failure Prediction in Multiphase Deep-Water Buoyancy Systems
Hoel, Eirik (Master thesis, 2013)The objective of this thesis is to explore how a new type of buoyancy material foroshore applications will perform under operating conditions. This includes buoy-ancy loads and extreme hydrostatic pressure. The new material ... -
Fatigue of Smart Composite Metal Joints
Lunder, Even Vardenær (Master thesis, 2013)Adhesive joints are ideal for connecting dissimilar materials in optimized structures.Low weight and potential savings in manufacturing costs are major advantages relatedto such joints, but their use is currently limited ... -
Fatigue properties of adhesive joints in composite patch repair
Log, Audun Reinsborg (Master thesis, 2012)This paper is a master thesis written at NTNU for the Co-Patch project. The Co-Patch project is an EU-funded consortium of 15 organizations from 8 different countries, developing a standard for composite patch repair of ... -
Filament winding of composite tubes
Dons, Karsten (Master thesis, 2013)Composite tubes outperform traditional pipe materials in applications requiring low weight, corrosion resistance and high strength. However, the lack of simple and reliable end fittings have limited their use. A new end ... -
Filament wound composite fatigue mechanisms investigated with full field DIC strain monitoring
Hugaas, Eivind; Echtermeyer, Andreas (Peer reviewed; Journal article, 2021)Fatigue of filament wound materials was investigated using Digital Image Correlation DIC monitoring every 50th cycle of a high cycle fatigue test of a split disk ring sample. The ring was cut from a filament wound glass ... -
HNBR elastomer composite with zero thermal contraction over a range of temperatures
Akulichev, Anton; Alcock, Benjamin; Protasov, Andrey; markin, pavel; Echtermeyer, Andreas (Journal article; Peer reviewed, 2019)Elastomers such as hydrogenated nitrile butadiene rubber (HNBR) are known to have inferior dimensional stability upon temperature changes compared to metallic materials. This can result in thermal contraction mismatches ... -
Hydrodynamic design of an affordable USV
Brodin, Hermann (Master thesis, 2020)Denne masteroppgaven presenter et arbeid som er gjennomført for å designe et rimelig priset ubemannet overflatefartøy. Oppgaven er delt inn i fire steg hvorav den første er å kombinere potensialteori, empiriske modeller ... -
Hygrothermal Aging of Amine Epoxy: Reversible Static and Fatigue Properties
Krauklis, Andrey; Gagani, Abedin; Echtermeyer, Andreas (Journal article; Peer reviewed, 2018)Fiber-reinforced polymers (FRP) are widely used in structural applications. Long-term properties of such materials exposed to water are of high concern and interest, especially for subsea and offshore applications. The ...