Browsing Vitenskapelige publikasjoner (TN-IMBM) by Author "Pavlou, Dimitrios"
Now showing items 1-20 of 20
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Bending capacity of multi-layered FRP pipelines during offshore installation
Pavlou, Dimitrios (Peer reviewed; Journal article, 2021)The Fiber Reinforced Polymeric (FRP) pipelines have higher strength than steel, and excellent fatigue behavior and corrosion resistance. Because of their superior performance in mechanical loads and corrosive environment, ... -
Bending-induced local buckling during offshore installation of multi-layered FRP pipelines
Pavlou, Dimitrios; Adasooriya, Mudiyan Nirosha Damayanthi (Peer reviewed; Journal article, 2021)In the last two decades FRP pipelines have attracted the attention of the oil industry because of their high strength, excellent fatigue performance and low specific weight. On the other hand, the final cost of installation ... -
A deterministic algorithm for nonlinear, fatigue-based structural health monitoring
Pavlou, Dimitrios (Peer reviewed; Journal article, 2021-10)The irregularity of peak and valley stress values of loading histories is the main impediment for accurate fatigue-based structural health monitoring. Since the available fatigue material data (e.g., S-N curves) have been ... -
Environment-assisted fatigue of steel bridges: A conceptual framework for life assessment
Sandviknes, Julie Sofie Stav; Adasooriya, Mudiyan Nirosha Damayanthi; Pavlou, Dimitrios; Hemmingsen, Tor (Peer reviewed; Journal article, 2021)This paper presents a framework based on a recently proposed fatigue strength curve of corroded steel to assess the life of an existing steel bridge exposed to environment-assisted fatigue. Environment-assisted cracking ... -
Fatigue design challenges: Recent linear and nonlinear models
Pavlou, Dimitrios (Peer reviewed; Journal article, 2019)Reliable fatigue design rules affect the proactive identification of safety parameters in engineering structures. Numerous fatigue crack initiation and propagation models, linear and nonlinear, have been developed for ... -
Fatigue Strength Curve for Tubular Joints of Offshore Structures under Dynamic Loading
Siriwardane, Sudath C.; Adasooriya, Mudiyan Nirosha Damayanthi; Pavlou, Dimitrios (Journal article, 2021)Abstract 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 ... -
Fatigue strength degradation of corroded structural details: A formula for S‐N curve
Adasooriya, Mudiyan Nirosha Damayanthi; Pavlou, Dimitrios; Hemmingsen, Tor (Peer reviewed; Journal article, 2019)A formula is proposed to predict fatigue strength of corroded members and joints of steel structures. The concept of the formula is first studied from recently identified mechanism of corrosion fatigue. Hence, the corresponding ... -
Fatigue strength degradation of metals in corrosive environments
Adasooriya, Mudiyan Nirosha Damayanthi; Hemmingsen, Tor; Pavlou, Dimitrios (Journal article; Peer reviewed, 2017)Structures exposed to aggressive environmental conditions are often subjected to time-dependent loss of coating and loss of material due to corrosion; this causes reduction in the cross-sectional properties of the members, ... -
Flexural dynamic behavior of submerged cylindrical structures under wave loads
Giotis, Theofanis; Pavlou, Dimitrios; Belibassakis, Konstadinos A. (Peer reviewed; Journal article, 2019-11)Abstract. An analytical solution for the dynamic response of submerged slender circular cylindrical structure subjected to linear wave loads is presented. A double Laplace transform with respect to temporal and spatial ... -
Flexural dynamic response of monopile foundations under linear wave loads
Giotis, Theofanis; Pavlou, Dimitrios (Peer reviewed; Journal article, 2020-03)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 ... -
Implementation of linear, double-linear, and nonlinear fatigue damage accumulation rules for fatigue life prediction of offshore drilling top-drive tie-rods
Inoma, Jesse Ebubechu; Pavlou, Dimitrios; Zec, J. (Peer reviewed; Journal article, 2019-11)The offshore oil and gas industry has been exposed to major challenges over the last decade, particularly demanding cost cuts and more effective technical solutions. Predictive systems and remaining life assessments for ... -
Mixed-mode I and II fatigue crack growth retardation due to overload: An experimental study
Rege, Kristen; Grønsund, Jørgen; Pavlou, Dimitrios (Peer reviewed; Journal article, 2019-12)Environmental loads acting on structures usually cause fatigue crack propagation under variable amplitude mixed-mode conditions. In order to better estimate the remaining fatigue life, the fatigue crack growth behaviour ... -
Modal analysis of offshore monopile wind turbine: An analytical solution
Pezeshki, Hadi; Pavlou, Dimitrios; Adeli, Hojjat; Siriwardane, Sudath C. (Peer reviewed; Journal article, 2022)An analytical solution of the dynamic response of offshore wind turbines under wave load with nonlinear Stokes’s wave theory and wave–structure and soil–foundation interactions is developed. Natural frequencies and the ... -
Nonlinear fatigue life prediction model based on the theory of the S-N fatigue damage envelope
Bjørheim, Fredrik; Pavlou, Dimitrios; Siriwardane, Sudath C. (Peer reviewed; Journal article, 2022)A nonlinear model is proposed in light of the theory of isodamage curves, to assess the cumulative fatigue damage under multistage loading. The isodamage curves were developed through the theory of the S-N fatigue damage ... -
A review of fatigue damage detection and measurement techniques
Bjørheim, Fredrik; Siriwardane, Sudath C.; Pavlou, Dimitrios (Peer reviewed; Journal article, 2021-09)A vast amount of research has been carried out towards the goal of quantifying changes related to the fatigue damaging process in materials throughout the fatigue life. However, no recommended practice has been developed ... -
S-N curve for riveted details in corrosive environment and its application to a bridge
Adasooriya, Mudiyan Nirosha Damayanthi; Hemmingsen, Tor; Pavlou, Dimitrios (Peer reviewed; Journal article, 2020-01)A formula for stress‐life curve is proposed to predict the fatigue life of riveted bridges located in corrosive environments. The corrosive environment‐dependent parameters of the S‐N curve are determined based on the ... -
Sensitivity Study of Design Parameters for a Fuel Cell Powered Multirotor Drone
Apeland, Jørgen; Pavlou, Dimitrios; Hemmingsen, Tor Henning (Peer reviewed; Journal article, 2021)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 ... -
State of the art in structural health monitoring of offshore and marine structures
Pezeshki, Hadi; Adeli, Hojjat; Pavlou, Dimitrios; Siriwardane, Sudath C. (Peer reviewed; Journal article, 2023)This paper deals with state of the art in structural health monitoring (SHM) methods in offshore and marine structures. Most SHM methods have been developed for onshore infrastructures. Few studies are available to implement ... -
Subsea FRP pipeline performance in external pressure: Failure and external pressure-induced buckling
Pavlou, Dimitrios (Peer reviewed; Journal article, 2021)The Subsea pipelines are subjected to high hoop stresses due to the hydrostatic pressure. When the internal pressure of the liquid has a higher value than the external hydrostatic one, there is a balance of the tensile and ... -
Suitability Analysis of Implementing a Fuel Cell on a Multirotor Drone
Apeland, Jørgen; Pavlou, Dimitrios; Hemmingsen, Tor (Peer reviewed; Journal article, 2020-05)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 ...