刘刚

个人信息Personal Information

教授

博士生导师

硕士生导师

主要任职:船舶工程学院党委书记

性别:男

毕业院校:日本广岛大学

学位:博士

所在单位:船舶工程学院

学科:船舶与海洋结构物设计制造

办公地点:综合实验二号楼412房间

联系方式:0411-84706091,13898403510

电子邮箱:liugang@dlut.edu.cn

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复杂焊接接头多轴疲劳强度评估的等效热点应力法

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论文类型:期刊论文

发表时间:2022-06-29

发表刊物:焊接学报

所属单位:运载工程与力学学部

期号:6

页面范围:10-14

ISSN号:0253-360X

摘要:The current hot spot stress approach still has some limitations to the multiaxial fatigue strength assessment of complex welded joints.In this paper,an new stress estimation approach for the multiaxial fatigue strength assessment of complex welded joints is proposed,in which an equivalent hot spot stress is defined at a point(called Zero Point) in plate thickness direction where nonlinear distribution stress due to the notch effect of the weld is equal to zero.The proposed approach is based on that the nonlinear stress peak is not included in the hot spot stress and the nonlinear distribution stress is in self-equilibrium.First,influence factors and change laws of the Zero Point position were discussed,and a fitting equation for determining the Zero Point position was established.Then,published fatigue tests data and numerical stress results of some welded joints were used for comparison between the proposed equivalent hot spot stress approach and the current hot spot stress approach.The equivalent hot spot stress approach was verified to be consistent with the current hot spot stress approach and also have higher accuracy for considering the thickness effect on the fatigue strength to a certain extent.The merit of the proposed approach is that it can be used to estimate the multiaxial fatigue strength of welded joints through combining multiaxial fatigue theory.

备注:新增回溯数据