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    Fatigue Reliability of Multidimensional Vibratory Degrading Systems under Random Loading

    Source: Journal of Engineering Mechanics:;2010:;Volume ( 136 ):;issue: 002
    Author:
    Kazimierz Sobczyk
    ,
    Kyriakos Perros
    ,
    Costas Papadimitriou
    DOI: 10.1061/(ASCE)EM.1943-7889.0000052
    Publisher: American Society of Civil Engineers
    Abstract: In this paper, the basic methodology for the fatigue reliability assessment of randomly vibrating multidegree-of-freedom systems is presented within the coupled response-degradation model. The fatigue process in the system components is quantified by the fatigue crack growth equations which—via the stress range—are coupled with the system response. Simultaneously, the system dynamics is affected by fatigue process via its stiffness degradation so that it provides the actual stress values to the fatigue growth equation. In addition to the general coupled response-degradation analysis, its special case of noncoupled fatigue crack growth is treated as well for the wide-band stationary applied stress by the use of its first four spectral moments and the approximate, empirically motivated, Dirlik’s probability distribution for the stress range. Both, the general analysis and the illustrating exemplary problems elaborated in the paper provide the route to the fatigue reliability estimation in complex–hierarchical vibratory systems under random loading.
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      Fatigue Reliability of Multidimensional Vibratory Degrading Systems under Random Loading

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    contributor authorKazimierz Sobczyk
    contributor authorKyriakos Perros
    contributor authorCostas Papadimitriou
    date accessioned2017-05-08T21:43:10Z
    date available2017-05-08T21:43:10Z
    date copyrightFebruary 2010
    date issued2010
    identifier other%28asce%29em%2E1943-7889%2E0000061.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/60499
    description abstractIn this paper, the basic methodology for the fatigue reliability assessment of randomly vibrating multidegree-of-freedom systems is presented within the coupled response-degradation model. The fatigue process in the system components is quantified by the fatigue crack growth equations which—via the stress range—are coupled with the system response. Simultaneously, the system dynamics is affected by fatigue process via its stiffness degradation so that it provides the actual stress values to the fatigue growth equation. In addition to the general coupled response-degradation analysis, its special case of noncoupled fatigue crack growth is treated as well for the wide-band stationary applied stress by the use of its first four spectral moments and the approximate, empirically motivated, Dirlik’s probability distribution for the stress range. Both, the general analysis and the illustrating exemplary problems elaborated in the paper provide the route to the fatigue reliability estimation in complex–hierarchical vibratory systems under random loading.
    publisherAmerican Society of Civil Engineers
    titleFatigue Reliability of Multidimensional Vibratory Degrading Systems under Random Loading
    typeJournal Paper
    journal volume136
    journal issue2
    journal titleJournal of Engineering Mechanics
    identifier doi10.1061/(ASCE)EM.1943-7889.0000052
    treeJournal of Engineering Mechanics:;2010:;Volume ( 136 ):;issue: 002
    contenttypeFulltext
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