Fatigue crack in large-scale tubular joints for offshore structures

Chul-Hee JO 已出版文章查询
Chul-Hee JO
1 * Sung-Woo IM 已出版文章查询
Sung-Woo IM
2 Won-Chul CHO 已出版文章查询
Won-Chul CHO
3 Kwan-Kyu PARK 已出版文章查询
Kwan-Kyu PARK

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1Department of Naval Architecture and Ocean Engineering Inha University Incheon 402-751 Republic of Korea

2Research Institute of Industrial Science and Technology GyeongGI-Do 445-810 Republic of Korea

3Department of Civil Environmental Engineering Chung-Ang University Seoul 156-756 Republic of Korea

4Samsung Heavy Industry Inc Gejeo 656-710 Republic of Korea

Tubular members have been used for constructing offshore structures. Large-scale fatigue tests of welded tubular K-joints under the balanced in-plane bending brace were carried out to investigate the fatigue behavior of API 2W Gr.50 steel produced by POSCO. The experimental results were verified by numerical approaches and compared with the IIW, DnV RP-C203 and API RP 2A-WSD design curves. The test results based on the hot spot stress were in agreement with the design curves. The SCF factor for tubular K-joint was also obtained. The numerical parametric study of the K-joint (using the finite element program) was described and its results were compared with experimental results. The stress effects of various parameters including α, β, γ, τ and θ on the stress in the K-joint were investigated. The stress distribution for each parameter was introduced. The study showed that the maximum stress of the joint varied according to the variation of joint parameters.

DOI: http://dx.doi.org/10.1007/s11431-010-4275-y

语种: 英文   

基金The research has been supported by Inha University.

关键词tubular K-joint API 2W Gr.50 hot spot stress SCF fatigue through-thickness crack S-N curve numerical parametric study

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