A modified cyclic cohesive zone model for fatigue crack initiation prediction for mooring chain steels

被引：1
|
作者：
Song, Zhi-Hao [1 ]
Chen, Nian-Zhong [1 ,2 ]
机构：
[1] Tianjin Univ, Sch Civil Engn, Tianjin 300350, Peoples R China
[2] Tianjin Univ, State Key Lab Hydraul Engn Intelligent Constructio, Tianjin 300350, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2024年 / 300卷
基金：
中国国家自然科学基金;
关键词：
Fatigue crack initiation (FCI); cyclic cohesive zone model (CCZM); Accumulated cohesive length; Fatigue; Mooring chains steels; GROWTH; SIMULATION; DAMAGE; PROPAGATION; INTRUSIONS; EXTRUSIONS; METALS;
D O I：
10.1016/j.engfracmech.2024.109985
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A modified cyclic cohesive zone model (CCZM) is proposed for predicting the fatigue crack initiation (FCI) life of mooring chain steels where the accumulated cohesive length in the damage evolution law is assumed to be a power function of normalized normal separation. The validity of the proposed CCZM is demonstrated by the comparison between model prediction of the proposed CCZM and a traditional CCZM, and experimental data of FCI lives of R4 and R5 grade mooring chain steels. The results indicate that the FCI lives predicted by the proposed CCZM are in good agreement with the experimental data.
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页数：10
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