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Long term material properties of pressure vessels made of composite material
(Doctoral theses at NTNU;2022:56, Doctoral thesis, 2022)Pressure vessels are currently the limiting factor in the hydrogen distribution chain. The pressure vessels are preferably made out of composite materials to achieve practical weight to strength ratios and avoid hydrogen ... -
Long Term Properties of Composites and Polymers
(Master thesis, 2023)Kompositt- og polymermaterialer brukes i offshore og maritim industri, men data angående deres ytelse etter langvarig eksponering for miljøet er begrenset. Dette er hovedsakelig på grunn av mangel på testede data vedrørende ... -
Long Term Properties of Glass Fiber Epoxy Laminates in Dry and Humid Environment
(Master thesis, 2022)A study of the stress rupture time of glass fiber epoxy composite laminates in humid environments was investigated. Test specimens were made in order to compare the failure time of a saturated and non-saturated specimen ... -
Long-Term Berth Capacity Planning Framework Development
(Master thesis, 2019)Havtransport bidrar sterkt til omfanget og velstanden i dagens globale handel. Havn er en viktig logistikkinfrastruktur i sjøtransport og har en direkte tilknytning til et lands økonomiske ytelse. Det europeiske havnesystemet ... -
Long-Term Dissolution of Glass Fibers in Water Described by Dissolving Cylinder Zero-Order Kinetic Model: Mass Loss and Radius Reduction.
(Journal article; Peer reviewed, 2018)Glass fibers are degraded when they are exposed to water. In this work, a model is developed that uses zero-order kinetics for predicting a decreasing glass fiber radius. The model is used to describe experimental test ... -
Long-Term Hydrolytic Degradation of the Sizing-Rich Composite Interphase
(Journal article; Peer reviewed, 2019)Glass fiber-reinforced composites are exposed to hydrolytic degradation in subsea and offshore applications. Fiber-matrix interphase degradation was observed after the matrix was fully saturated with water and typical water ... -
Long-term ISO 23936-2 sweet oil ageing of HNBR
(Journal article; Peer reviewed, 2021)A hydrogenated nitrile butadiene rubber (HNBR) compound is subjected to ageing in a simulated oil and gas environment in accordance with ISO 23936-2 standard at two elevated temperatures (130 °C and 150 °C) for a period ... -
Long-term meteorological data collection in Prato Piazza
(Bachelor thesis, 2023)Denne oppgaven tar for seg tverrfaglige teknikker til å belære seg om matematisk modellering, klimatologi og meterologi ved å benytte programmering. Hensikten med oppgaven er å føre værstatistikk av området Prato Piazza ... -
Long-Term Properties of Interlaminar Shear Strength of Composite Laminates
(Master thesis, 2018)Components made of fiber reinforced polymers (FRP) are frequently used in environments with fluctuating temperatures and moisture levels. These environmental factors lead to a degradation of the FRP in the long term. The ... -
Long-term properties of the matrix of composites
(Master thesis, 2016)Water diffusion into epoxy can be looked upon on as a 3-stage process. The first stage is the initial reaction, where the ends and available surfaces of the molecular chains bond with the water molecules. These easily ... -
Long-Time Trends in Night Sky Brightness and Ageing of SQM Radiometers
(Peer reviewed; Journal article, 2022)A very wide-used instrument for the measurement of the Night Sky Brightness (NSB) is the Sky Quality Meter (SQM). One of its important issues is tracking NSB for long time and connecting its variations to changes in outdoor ... -
Low Cost Human - Machine Interaction Platform for Bridging the Uncanny Valley, Using Humans as the Control System Input.
(Master thesis, 2017)This master's thesis describes the development of a conceptual prototype of a smooth actuation and control system of the eyes in a healthcare simulation mannequin with the aim to achieve perceived human like eye movement ... -
Low cycle fatigue behavior of additively manufactured Ti-6Al-4V under non-proportional and proportional loading
(Journal article; Peer reviewed, 2019)Experimental tests were conducted on additive manufactured Ti-6Al-4V titanium alloy to investigate the mechanical and crack properties under multiaxial cyclic loading. Selective Laser Sintering technique (SLS) was employed ... -
Low cycle fatigue life prediction of 10CrNi3MoV steel and undermatched welds by damage mechanics approach
(Peer reviewed; Journal article, 2021)Welding of steel is a technique frequently used in practical engineering applications; however, their mechanical performance is strongly dependent on the physical metallurgical status of the weldments. In the present study, ... -
Low cycle fatigue of bolted connections in composites for arctic applications
(Master thesis, 2011)Nowadays composite materials are a very interesting research field. They show an extraordinary performance due to their high stiffness and low density. They are applied in high advance technology industries such as aerospace ... -
Low-cost Navigation and Collision Avoidance System
(Master thesis, 2020)Ettersom teknologien rundt autonome bakke-kjøretøy (AGV’er) stadig er i utvikling, trenger man også mer datakraft for å realisere disse systemene. Samtidig er lav-kost ettkorts datamaskiner (SBC’er) med høy ytelse blitt ... -
A low-cost predictive display for teleoperation: Investigating effects on human performance and workload
(Peer reviewed; Journal article, 2020)Teleoperation in an environment with latency is difficult and highly stressful for human operators, resulting in high cognitive workload and decreased human performance. This work investigates if a simple predictive display ... -
Low-cost tooling concept for customized tube bending by the use of additive manufacturing
(Peer reviewed; Journal article, 2023)Bending is commonly used in the manufacturing of finished and semi-finished, profilebased products. However, costly profile and bend geometry dependent tooling hampers its applicability for low volume production or ... -
Low-cost tooling concepts for customized tube bending processes using hybrid design and additive manufacturing
(Master thesis, 2023)Denne oppgavens fokus vil være på den fleksible bøyeprosessen som tar plass i en rørbøyingsmaskin. Denne forminsprosessen tar inn en aluminiumsrør og bøyer det til den ønskede formen, med de rette dimensjonene. Det endelige ... -
A low-cost vibration isolation chamber – Making high precision experiments accessible
(Peer reviewed; Journal article, 2022)Mechanical vibrations greatly influence sensitive instruments and experiments, yet they are unavoidable. Commercial solutions that mitigate the transfer of mechanical vibrations into experiments and instruments are often ...