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    A Probabilistic Evaluation Method on Temperature and Time-Dependent Stress Intensity Limit St in Creep Assessment of Components at Elevated Temperatures

    Source: Journal of Pressure Vessel Technology:;2024:;volume( 147 ):;issue: 001::page 11702-1
    Author:
    Hou, Xin-Yang
    ,
    Fu, Jin-Hui
    ,
    Gong, Jian-Guo
    ,
    Zhao, Peng
    ,
    Xuan, Fu-Zhen
    DOI: 10.1115/1.4067016
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Creep is an important damage mode of components at elevated temperatures, and the temperature and time-dependent stress intensity limit St is an essential indicator in creep assessment of components. In general, the safety factors are directly applied to three criteria in stress intensity limit St in ASME code, but a quantitative evaluation on the failure probability covered in this indicator is rarely reported. Based on this, a probabilistic evaluation method on stress intensity limit St is proposed by correlating each criterion with mean creep rupture life data. The failure probability of three criteria in stress intensity limit St of 316 and 304 stainless steels is calculated, and the effect of safety factors on failure probability results is discussed. A probabilistic evaluation on stress intensity limit St is conducted. Results indicate that the stress intensity limit St presents a low failure probability or high conservativeness, and the minimum stress to creep rupture is the governing role in stress intensity limit St for cases involved. The failure probability of stress intensity limit St of 316 stainless steel is much lower than that of 304 stainless steel, attributed to the differences of creep deformation features and data scatter of the two stainless steels.
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      A Probabilistic Evaluation Method on Temperature and Time-Dependent Stress Intensity Limit St in Creep Assessment of Components at Elevated Temperatures

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    contributor authorHou, Xin-Yang
    contributor authorFu, Jin-Hui
    contributor authorGong, Jian-Guo
    contributor authorZhao, Peng
    contributor authorXuan, Fu-Zhen
    date accessioned2025-04-21T10:20:52Z
    date available2025-04-21T10:20:52Z
    date copyright11/22/2024 12:00:00 AM
    date issued2024
    identifier issn0094-9930
    identifier otherpvt_147_01_011702.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4305989
    description abstractCreep is an important damage mode of components at elevated temperatures, and the temperature and time-dependent stress intensity limit St is an essential indicator in creep assessment of components. In general, the safety factors are directly applied to three criteria in stress intensity limit St in ASME code, but a quantitative evaluation on the failure probability covered in this indicator is rarely reported. Based on this, a probabilistic evaluation method on stress intensity limit St is proposed by correlating each criterion with mean creep rupture life data. The failure probability of three criteria in stress intensity limit St of 316 and 304 stainless steels is calculated, and the effect of safety factors on failure probability results is discussed. A probabilistic evaluation on stress intensity limit St is conducted. Results indicate that the stress intensity limit St presents a low failure probability or high conservativeness, and the minimum stress to creep rupture is the governing role in stress intensity limit St for cases involved. The failure probability of stress intensity limit St of 316 stainless steel is much lower than that of 304 stainless steel, attributed to the differences of creep deformation features and data scatter of the two stainless steels.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleA Probabilistic Evaluation Method on Temperature and Time-Dependent Stress Intensity Limit St in Creep Assessment of Components at Elevated Temperatures
    typeJournal Paper
    journal volume147
    journal issue1
    journal titleJournal of Pressure Vessel Technology
    identifier doi10.1115/1.4067016
    journal fristpage11702-1
    journal lastpage11702-9
    page9
    treeJournal of Pressure Vessel Technology:;2024:;volume( 147 ):;issue: 001
    contenttypeFulltext
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