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    Volume 48, Issue 6 (November 2020)

    Fatigue Damage Accumulation Model of 6082-T6 Aluminum Alloy in Conditions of Block Bending and Torsion

    (Received 23 October 2017; accepted 5 September 2018)

    Published Online: 2020

    CODEN: JTEVAB

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    Abstract

    This article presents a comparison of damage accumulation calculations performed according to the Palmgren-Miner linear damage hypothesis and a new nonlinear damage accumulation aggregation hypothesis based on material memory for completed experimental block tests of 6082-T6 aluminum alloy. Block loads represent operating runs by way of application in proper sequence blocks with the specific number of cycles of the sinusoidal course. Depending on the combination chosen, the duration of the first block was 20, 40, or 60 % of the base number of cycles Nf and of the second block until damage. Block tests were carried out for both bending and torsion. Moreover, the article contains a review of the newest proposals regarding the assessment of fatigue damage accumulation. The results obtained from calculations of the analyzed two hypotheses of fatigue damage accumulation have been compared with the calculations of a damage degree for random loading. During the analysis of the average values obtained, it may be observed that the authors’ new proposal gives better results.

    Author Information:

    Böhm, Ewelina
    Department of Mechanics and Machine Design, Faculty of Mechanical Engineering, Opole University of Technology, Opole,

    Kurek, Marta
    Department of Mechanics and Machine Design, Faculty of Mechanical Engineering, Opole University of Technology, Opole,

    Łagoda, Tadeusz
    Department of Mechanics and Machine Design, Faculty of Mechanical Engineering, Opole University of Technology, Opole,


    Stock #: JTE20170598

    ISSN:0090-3973

    DOI: 10.1520/JTE20170598

    Author
    Title Fatigue Damage Accumulation Model of 6082-T6 Aluminum Alloy in Conditions of Block Bending and Torsion
    Symposium ,
    Committee E08