Izvorni znanstveni članak

https://doi.org/10.21278/brod70102

FATIGUE ASSESSMENT OF CRACK GROWTH BASED ON FAILURE ASSESSMENT DIAGRAMS FOR A SEMI-SUBMERSIBLE PLATFORM

Shilun Zhao ; School of Civil Engineering and Transportation, South China University of Technology, Jiaotong Building 402B, South China University of Technology, Guangzhou, Guangdong 510640, China
Chaohe Chen ; School of Civil Engineering and Transportation, South China University of Technology, Jiaotong Building 402B, South China University of Technology, Guangzhou, Guangdong 510640, China
Tianhui Fan ; School of Civil Engineering and Transportation, South China University of Technology, Jiaotong Building 402B, South China University of Technology, Guangzhou, Guangdong 510640, China

Sažetak

This paper deals with the assessment of fatigue crack propagation on the connection between column and brace for a semi-submersible. The analysis of global and local structural responses under different sea states are performed to acquire the transfer functions of stresses. Based on an existing crack the Failure Assessment Diagrams (FAD) are applied as criterion of acceptance for the safety of crack and structure during the crack growth calculation cycle. The crack growth rate considering threshold stress intensity factor and stress ratio is used. During safety assessment the stress response from ultimate sea state is outlined. A comparison of fatigue crack growth using ultimate stress and normal stress data with different crack growth rate is presented. The results show the reliability of fatigue assessment using FAD as a measurement of acceptability of crack propagation.

Ključne riječi

Crack propagation; Semi-submersible; FAD; Fracture mechanics; Structural safety; Offshore platform

Hrčak ID:

211203

URI

https://hrcak.srce.hr/211203

Datum izdavanja:

31.3.2019.

Posjeta: 1.559 *