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    On Creep Fatigue Interaction of Components at Elevated Temperature

    Source: Journal of Pressure Vessel Technology:;2016:;volume( 138 ):;issue: 004::page 41403
    Author:
    Barbera, Daniele
    ,
    Chen, Haofeng
    ,
    Liu, Yinghua
    DOI: 10.1115/1.4032278
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The accurate assessment of creep–fatigue interaction is an important issue for industrial components operating with large cyclic thermal and mechanical loads. An extensive review of different aspects of creep fatigue interaction is proposed in this paper. The introduction of a high temperature creep dwell within the loading cycle has relevant impact on the structural behavior. Different mechanisms can occur, including the cyclically enhanced creep, the creep enhanced plasticity and creep ratchetting due to the creep fatigue interaction. A series of crucial parameters for crack initiation assessment can be identified, such as the start of dwell stress, the creep strain, and the total strain range. A comparison between the ASME NH and R5 is proposed, and the principal differences in calculating the aforementioned parameters are outlined. The linear matching method (LMM) framework is also presented and reviewed, as a direct method capable of calculating these parameters and assessing also the steady state cycle response due to creep and cyclic plasticity interaction. Two numerical examples are presented, the first one is a cruciform weldment subjected to cyclic bending moment and uniform high temperature with different dwell times. The second numerical example considers creep fatigue response on a long fiber reinforced metal matrix composite (MMC), which is subjected to a cycling uniform thermal field and a constant transverse mechanical load. All the results demonstrate that the LMM is capable of providing accurate solutions, and also relaxing the conservatisms of the design codes. Furthermore, as a direct method, it is more efficient than standard inelastic incremental finite element analysis.
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      On Creep Fatigue Interaction of Components at Elevated Temperature

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    contributor authorBarbera, Daniele
    contributor authorChen, Haofeng
    contributor authorLiu, Yinghua
    date accessioned2017-05-09T01:32:46Z
    date available2017-05-09T01:32:46Z
    date issued2016
    identifier issn0094-9930
    identifier otherpvt_138_04_041403.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/162367
    description abstractThe accurate assessment of creep–fatigue interaction is an important issue for industrial components operating with large cyclic thermal and mechanical loads. An extensive review of different aspects of creep fatigue interaction is proposed in this paper. The introduction of a high temperature creep dwell within the loading cycle has relevant impact on the structural behavior. Different mechanisms can occur, including the cyclically enhanced creep, the creep enhanced plasticity and creep ratchetting due to the creep fatigue interaction. A series of crucial parameters for crack initiation assessment can be identified, such as the start of dwell stress, the creep strain, and the total strain range. A comparison between the ASME NH and R5 is proposed, and the principal differences in calculating the aforementioned parameters are outlined. The linear matching method (LMM) framework is also presented and reviewed, as a direct method capable of calculating these parameters and assessing also the steady state cycle response due to creep and cyclic plasticity interaction. Two numerical examples are presented, the first one is a cruciform weldment subjected to cyclic bending moment and uniform high temperature with different dwell times. The second numerical example considers creep fatigue response on a long fiber reinforced metal matrix composite (MMC), which is subjected to a cycling uniform thermal field and a constant transverse mechanical load. All the results demonstrate that the LMM is capable of providing accurate solutions, and also relaxing the conservatisms of the design codes. Furthermore, as a direct method, it is more efficient than standard inelastic incremental finite element analysis.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleOn Creep Fatigue Interaction of Components at Elevated Temperature
    typeJournal Paper
    journal volume138
    journal issue4
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.4032278
    journal fristpage41403
    journal lastpage41403
    identifier eissn1528-8978
    treeJournal of Pressure Vessel Technology:;2016:;volume( 138 ):;issue: 004
    contenttypeFulltext
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