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    赵海盛

    • 副教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:南洋理工大学
    • 学位:博士
    • 所在单位:水利工程系
    • 学科:水工结构工程
    • 办公地点:大连理工大学 工程抗震试验大厅209房间
    • 联系方式:hzhao@dlut.edu.cn
    • 电子邮箱:HZHAO@dlut.edu.cn

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    Strain-based fracture assessment for an interface crack in clad pipes under complicated loading conditions

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    论文类型:期刊论文

    发表时间:2020-02-15

    发表刊物:OCEAN ENGINEERING

    收录刊物:EI、SCIE

    卷号:198

    ISSN号:0029-8018

    关键字:Welded clad pipeline; Weld toe; Surface crack; Reference strain fracture assessment formulation

    摘要:In welded clad pipelines, the weld toe is a critical failure position due to the combined effects of the potential weld defects and the stress concentration induced by weld reinforcement. The fracture risk in this position has seldom been assessed. Moreover, the pipelines are often exposed to complicated loading environments during the service period. Thus, the fracture responses of the pipelines with a crack at the weld toe and subjected to tension and internal pressure are considered in this study. A reference strain fracture assessment formulation is derived for the weld toe crack in welded clad pipelines. The formulation detailed expression form is determined by the extensive parametric finite element (FE) analyses and standard least square fitting method. The accuracy of the proposed formulation is validated by conducting a comparative study in J values attained from the formulation and FE analysis. Finally, a further study on extending the application range of the estimation formulation is carried out.