Fracture Analyses of Cracked Delta Eye Plates in Ship Towing

5th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Huang, Xiangbing^1 ; Huang, Xingling^1 ; Sun, Jizheng^1

Department of Naval Architecture, Naval University of Engineering, Wuhan, Hubei Province

430033, China^1

关键词: Domain integrals;    Effective stress intensity factor;    Fracture analysis;    Fracture criteria;    Reasonability;    Safety analysis;    Strength theory;    Three dimensional finite element analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/301/1/012028/pdf
DOI  :  10.1088/1757-899X/301/1/012028

来源: IOP

【 摘 要 】

Based on fracture mechanics, a safety analysis approach is proposed for cracked delta eye plates in ship towing. The static analysis model is presented when the delta eye plate is in service, and the fracture criterion is introduced on basis of stress intensity factor, which is estimated with domain integral method. Subsequently, three-dimensional finite element analyses are carried out to obtain the effective stress intensity factors, and a case is studied to demonstrate the reasonability of the approach. The results show that the classical strength theory is not applicable to evaluate the cracked plate while fracture mechanics can solve the problem very well, and the load level, which a delta eye plate can carry on, decreases evidently when it is damaged.