Blar i Vitenskapelige publikasjoner (TN-IMBM) på forfatter "Mikkelsen, Ove"
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An accurate fatigue damage model for welded joints subjected to variable amplitude loading
Aeran, Ashish; Siriwardane, S.A. Sudath C.; Mikkelsen, Ove; Langen, Ivar (Journal article; Peer reviewed, 2017)Researchers in the past have proposed several fatigue damage models to overcome the shortcomings of the commonly used Miner's rule. However, requirements of material parameters or S-N curve modifications restricts their ... -
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). ... -
Experimental and numerical study of the elastic SCF of tubular joints
Atteya, Mostafa; Mikkelsen, Ove; Wintle, John; Ersdal, Gerhard (Peer reviewed; Journal article, 2021-07)This paper provides data on stress concentration factors (SCFs) from experimental measurements on cruciform tubular joints of a chord and brace intersection under axial loading. High-fidelity finite element models were ... -
Experimental assessment of cracked tubular joints repaired with crack-deflecting holes and weld-toe grinding
Riise, Simen; Atteya, Mostafa Ahmed; Mikkelsen, Ove; Ersdal, Gerhard (Peer reviewed; Journal article, 2023)Tubular joints in offshore structures for energy production are exposed to cyclic loading and may experience fatigue cracking. Presently, the inspection method commonly used for such structures will primarily detect whether ... -
Numerical stress analysis of tubular joints
Santacruz, Alejandro Polo; Mikkelsen, Ove (Peer reviewed; Journal article, 2021)The finite element analysis (FEA) presented in this paper pertains to the stress analysis of both the welded tubular T and X joints and is aimed to assess both the importance of the presence of the weld geometry and the ... -
State-of-the-art of crack propagation modelling in tubular joints
Atteya, Mostafa Ahmed; Mikkelsen, Ove; Lemu, Hirpa G. (Peer reviewed; Journal article, 2019)Offshore structures are conventionally designed for a service life between 20-30 years and mostly used beyond their service life. They are operated up to the point where costs of operations, maintenance and repair exceed ... -
Statistical evaluation of tubular joint SCFs from test data and finite element analyses
Ersdal, Gerhard; Atteya, Mostafa Ahmed; Mikkelsen, Ove (Peer reviewed; Journal article, 2023)Stress concentration factors (SCF) derived from both FEA and measurements from laboratory experiments are associated with uncertainties. To understand these uncertainties, SCF values can be determined from a series of tests ... -
Strength analysis of 3D printed carbon fibre reinforced thermoplastic using experimental and numerical methods
Ghebretinsae, Fithawi; Mikkelsen, Ove; Akessa, Adugna Deressa (Peer reviewed; Journal article, 2019)A study of strength of composite materials produced by 3D printing technology is presented. The samples fabrication and tests to determine the strength both in bending and in tension of the composite materials have been ...