Dimitrios G. Pavlou
University of Stavanger
GeologyEngineeringMathematical analysisFinite element methodEquations of motionComposite materialPipeline transportBoundary value problemMaterials scienceIntegral transformStress concentrationFatigue damageMathematicsTorsion (mechanics)Computer scienceMechanicsFracture mechanicsStructural engineeringParis' lawFibre-reinforced plasticStress (mechanics)Laplace transform
88Publications
9H-index
359Citations
Publications 84
Newest
Last. Dimitrios G. PavlouH-Index: 9
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Offshore structures are subjected to dynamic environmental loads (wave and wind loads). A stress-life fatigue strength curve is proposed for tubular joints which are in the splash zone area of offshore jacket structures. The Det Norske Veritas (DNV) offshore structures standards given design T-curve in the air is modified with the environment-dependent parameters to obtain this fatigue strength curve. Validity of the curve is done by comparing fatigue lives given by the proposed curve with exper...
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1 CitationsSource
#1Jørgen Apeland (University of Stavanger)H-Index: 1
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
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The use of multirotor drones for industrial applications is accelerating, and fuel cell based propulsion systems are highlighted as a promising approach to improve endurance – one of the current main limitations. Due to multirotor drones’ unique requirements, careful system design is needed to maximize the performance advantage. In this work a sensitivity analysis that quantifies the impact of central system parameters for an X8 multirotor drone with a 2 kW fuel cell hybrid system is presented a...
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#1Mostafa Atteya (University of Stavanger)
#2Ove Mikkelsen (University of Stavanger)H-Index: 5
Last. Gerhard ErsdalH-Index: 8
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1 CitationsSource
#1Jørgen Apeland (University of Stavanger)H-Index: 1
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
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Industrial use of multirotor drones is gaining traction, and fuel cell based power sources have been identified as a way of improving the flight endurance from what is possible to achieve with current lithium-based battery options. The state-of-technology and barriers for further adoption are presented. It is found that there are lightweight options commercially available and that the viability of powering multirotor drones for long-range and high endurance missions is demonstrated. The barriers...
1 CitationsSource
#1Jørgen Apeland (University of Stavanger)H-Index: 1
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
view all 3 authors...
Increased flight time of multirotor drones is a key enabler for further adoption and industrial use of drones. A model for analyzing the performance of a fuel cell hybrid system for a multirotor drone is presented and applied for a case with an X8 multirotor drone with a maximum take-off mass of 25 kg. Endurance is the main performance parameter, and the model can be used to quantify the relative performance between different power sources. The model aims to determine if a specific hybrid fuel c...
4 CitationsSource
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#1Nirosha D. Adasooriya (University of Stavanger)H-Index: 4
#2Dimitrios G. Pavlou (University of Stavanger)H-Index: 9
Last. Tor Hemmingsen (University of Stavanger)H-Index: 9
view all 3 authors...
3 CitationsSource
#1Theofanis GiotisH-Index: 1
An analytical solution for the dynamic response of submerged slender circular cylindrical structures subjected to linear wave loads is presented. A double Laplace transform with respect to temporal and spatial variables is applied both to motion equation and boundary conditions. The dynamic deflection of the beam is obtained by inversion of the Laplace transform. The latter with respect to spatial variable is obtained analytically, while the one concerning the temporal variable is numerically ca...
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