Now showing items 341-360 of 1741

    • Experimental investigation and ANN prediction for part quality improvement of fused deposition modeling parts 

      Tura, Amanuel; Mamo, Hanna; Jelila, Yohannis; Lemu, Hirpa G. (Peer reviewed; Journal article, 2021)
      Fused deposition modeling (FDM) is the most prevalent thermoplastic additive manufacturing technology. Many input parameters and their settings have a significant impact on the quality and functionality of FDM parts produced. ...
    • Burst strength analysis of composite overwrapped pressure vessel using finite element method 

      Regassa, Yohannes; Lemu, Hirpa G.; Sirhabizu, Belete (Peer reviewed; Journal article, 2021)
      The purpose of this numerical study was to investigate the burst performance of a type III composite overwrapped pressure vessel (COPV) using finite element methods. An Aluminum overwrapped composites pressure vessel was ...
    • Characterization of acoustic emission signals under 3-point bending test 

      Nguyen, Bao; Lemu, Hirpa G.; Gabrielsen, Ole; El-Thalji, Idriss (Peer reviewed; Journal article, 2021)
      This paper summarizes a master’s thesis project which explored whether the characteristics of Acoustic Emission Testing (AET) signals can be used to detect yielding in steel samples undergoing a three-point bending test. ...
    • Numerical study on deployment of subsea template using coupled and uncoupled model 

      Hauge, Nils Olav; Li, Lin (Peer reviewed; Journal article, 2021)
      This study compares deployment of a subsea template simulated as a coupled model and as an uncoupled model in the time domain simulation software Orcaflex. Defining vessel motion as prescribed simplifies the model and will ...
    • Identification of the safety operating envelope of a novel subsea shuttle tanker 

      Ma, Yucong; Xing, Yihan (Peer reviewed; Journal article, 2022-10)
      A baseline Subsea Shuttle Tanker (SST) was proposed as a cost-efficient maritime transportation method. It is designed to be a 164 m length, 17 m beam autonomous underwater vessel with a cargo capacity of over 16,000 m3. ...
    • Pedestrian Wind Comfort Assessment Using Computational Fluid Dynamics Simulations With Varying Number of Wind Directions 

      Hågbo, Trond-Ola; Giljarhus, Knut Erik Teigen (Peer reviewed; Journal article, 2022-07)
      The construction of a building inevitably changes the microclimate in its vicinity. Many city authorities request comprehensive wind studies before granting a building permit, which can be obtained through Computational ...
    • Thin-Walled Cylindrical Shell Storage Tank under Blast Impacts: Finite Element Analysis 

      Al-Yacouby, A.M.; Hao, Lo Jia; Liew, M. S.; Samarakoon, Mudiyansele Samindi Manjula K; RATNAYAKE MUDIYANSELAGE, Chandima (Peer reviewed; Journal article, 2021)
      Thin-walled cylindrical shell storage tanks are pressure vessels in which the walls of the vessel have a thickness that is much smaller than the overall size of the vessel. These types of structures have global applications ...
    • Welding procedure qualification record (WPQR) for welds fabricated at proximity 

      Bhardwaj, Sachin; RATNAYAKE MUDIYANSELAGE, Chandima (Peer reviewed; Journal article, 2022)
      Maintaining the minimum allowable distance between proximity welds has always been considered a subject of debate among design engineers, welding engineers/inspectors and fabricators/engineering contractors. The scattered ...
    • Experience in Use of 3D Printing in Engineering Education at University of Stavanger 

      Lemu, Hirpa Gelgele; Mikkelsen, Ove (Peer reviewed; Journal article, 2021)
      This article is based on a project run in 2018 and 2019 entitled “Educating Mechanical Engineering using 3D Printing – Under3DP”. The project was funded by Faculty of Science and Technology, University of Stavanger (UiS). ...
    • Finite Element Analysis of Steel Plates with Rectangular Openings Subjected to Axial Stress 

      Al-Yacouby, Ahmad Mahamad; Arwie Amri, Mazli; Liew, M. S.; RATNAYAKE MUDIYANSELAGE, Chandima; Samarakoon, Mudiyansele Samindi Manjula K (Peer reviewed; Journal article, 2022)
      Steel plates with openings are among the important ship structural components used in the ship’s hull to withstand the hydrostatic forces of the ocean, which cause sagging and hogging moments at the ship’s bottom. The ...
    • The effect of laser surface melting on the retained austenite and wear properties of AISI D2 tool steel 

      Moradiani, Amir; Beiranvand, Zeinab Malekshahi; RATNAYAKE MUDIYANSELAGE, Chandima; Aliabadi, Amir; Rasoulinia, Mehdi (Peer reviewed; Journal article, 2021)
      In this study the effect of laser surface melting (LSM) on the amount of retained austenite, hardness and wear resistance of AISI D2 steel was investigated utilizing hardness test, X-ray diffraction (XRD), pin on disk wear ...
    • Multiphysics Modeling and Numerical Simulation in Computer-Aided Manufacturing Processes 

      Trzepiecinski, Tomasz; dell’Isola, Francesco; Lemu, Hirpa G. (Peer reviewed; Journal article, 2021)
      The concept of Industry 4.0 is defined as a common term for technology and the concept of new digital tools to optimize the manufacturing process. Within this framework of modular smart factories, cyber-physical systems ...
    • Modeling of Heavy-Oil Flow with Regard to Their Rheological Properties 

      Beloglazov, Ilia; Morenov, Valentin; Leusheva, Ekaterina; Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2021)
      With the depletion of traditional energy resources, the share of heavy-oil production has been increasing recently. According to some estimates, their reserves account for 80% of the world’s oil resources. Costs for ...
    • Aerodynamic Investigation of Tucked Positions in Alpine Skiing 

      Elfmark, Ola; Giljarhus, Knut Erik Teigen; Liland, Fredrik Fang; Oggiano, Luca; Reid, Robert (Peer reviewed; Journal article, 2021)
      The purpose of this investigation was to examine the aerodynamics of tucked positions in competitive alpine skiing. To further our understanding of how a skier’s position affects the air flow and the resulting aerodynamic ...
    • Numerical and analytical studies of ship deckhouse impact with steel and RC bridge girders 

      Sha, Yanyan; Amdahl, Jørgen; Dørum, Cato (Peer reviewed; Journal article, 2021)
      Bridges crossing navigable waterways are under the threat of accidental collisions from passing ships. However, previous research focus was mainly placed on ship collision with bridge substructures while ship-bridge ...
    • Recommendation on use of wind lidars 

      Reuder, Joachim; Cheynet, Etienne; Clifton, Andrew; van Dooren, Marijn Floris; Gottschall, Julia; Jakobsen, Jasna Bogunovic; Mann, Jakob; Palma, Jose; Schlipf, David; Sjøholm, Mikael; Trujillo, Juan-Jose; Thobois, Ludovic; Würth, Ines; Zasso, Alberto (Research report, 2021)
      The 15 Early Stage Researchers (ESRs) in the LIKE project investigate topics in which wind lidar play a significant role. This report provides the ESRs an introductory reading and gives a short introduction into the basic ...
    • 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 ...
    • Observations of bridge stay cable vibrations in dry and wet conditions: A case study 

      Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjørnsson, Jonas Thor; Cheynet, Etienne; Wang, Jungao (Peer reviewed; Journal article, 2021)
      The characteristics of wind- and rain-wind-induced vibrations of bridge stay cables are studied by using ambient vibrations records acquired on a cable-stayed bridge. Mean wind speed and wind-cable angle, as well as the ...
    • Digitization Methods of Grinding Pins for Technological Process Planning 

      Wdowik, R.; RATNAYAKE MUDIYANSELAGE, Chandima; Zolkos, M.; Magdziak, Marek; Valino, G.; Alvarez, B.J.; Misiura, J. (Peer reviewed; Journal article, 2020)
      The paper presents different techniques for digitizing grinding pins and discusses the use of digitalized pins and the results of measurements in technological process planning (TPP), focusing on the challenges of the ...
    • Dynamic analysis of spur gear with backlash using ADAMS 

      Ambaye, Getachew A.; Lemu, Hirpa Gelgele (Peer reviewed; Journal article, 2020)
      Gear tooth profile can deviate from its initial design shape and size as a result of increasing service time under time-varying load, introducing external agents like debris, overheating due to friction, wear, and in ...