Numerical and experimental fretting fatigue with application to engineering design
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Fretting is a term covering a wide array of physical phenomena. When contacting bodies vibrate, relative slip between the bodies cause surface damage including wear and plasticity and cracks. Partially stuck contacts with high stress gradients produce micro-cracks at the surface which may propagate and cause fretting fatigue failure. Grossly sliding contacts, however, are often dominated by increasing wear and loss of material. Fretting have long been an interest to researchers in tribology and material sciences and continues to be a relevant phenomenon in engineering practice. Numerous theories and methodologies are applied to fretting problems, but engineering approaches are often simpler than those found in academia. In this thesis, fretting fatigue is investigated both numerically and experimentally with special attention to engineering applications. It is recognised that recent academic advancements in understanding and modelling capabilities represent opportunities for the practicing engineer facing fretting problems. In this thesis, traditional modelling using Finite Elements is used to solve fretting contacts. Critical plane post-processing is used to investigate fretting cracking behaviour. Some new experimental test rigs were developed to produce experimental results. Finally, simple, lumped-mass models were used to investigate friction dynamics related to fretting contacts.
Has partsPaper 1: Sunde, Steffen Loen; Berto, Filippo; Haugen, Bjørn. Predicting fretting fatigue in engineering design. International Journal of Fatigue 2018 ;Volum 117. s. 314-326 https://doi.org/10.1016/j.ijfatigue.2018.08.028
Paper 2: Sunde, Steffen Loen; Berto, Filippo; Haugen, Bjørn. Efficient implementation of critical plane for 3D stress histories using triangular elements. International Journal of Fatigue 2020 ;Volum 134. https://doi.org/10.1016/j.ijfatigue.2019.105448 This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).
Paper 3: Sunde, Steffen Loen; Haugen, Bjørn; Berto, Filippo. Fretting in medium-speed reciprocating engines - Comments on practices and opportunities. Material Design & Processing Communications (MDPC) 2020 https://doi.org/10.1002/mdp2.201 This is an open access article under the terms of the Creative Commons Attribution License (CC BY 4.0)
Paper 4: Sunde, Steffen Loen; Haugen, Bjørn; Berto, Filippo. Experimental and numerical fretting fatigue using a new test fixture. International Journal of Fatigue 2021 ;Volum 143 https://doi.org/10.1016/j.ijfatigue.2020.106011 This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).