Fracture Assessment and Fatigue Assessment of Jacket Tubular Joints

Abstract

Abstract:

The design and assessment of jacket tubular joints are usually performed based on the stress-lifetime (S-N) curve in Chinese ocean oil and gas engineering projects, while the fracture mechanics methods are rarely employed. This article describes the basic theory of fracture mechanics, ECA, fatigue crack growth law and general assessment procedure, and then gives an assessment example by JPEFA program.

Key words: ocean oil and gas engineering, tubular joint, fatigue assessment, fracture mechanics, ECA

CLC Number:

TE54

Yan-kun YIN. Fracture Assessment and Fatigue Assessment of Jacket Tubular Joints[J]. Ocean Engineering Equipment and Technology, 2014, 1(2): 129-135.

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极端工况名义应力/MPa			应力集中系数			热点应力 /MPa	焊接残余应力 /MPa	弯曲度	主膜应力 p_m/MPa	主弯曲应力 p_b/MPa
轴向	平面内弯曲	平面外弯曲	轴向	平面内弯曲	平面外弯曲	热点应力 /MPa	焊接残余应力 /MPa	弯曲度	主膜应力 p_m/MPa	主弯曲应力 p_b/MPa
47.6	1.32	60.43	3.22	2.13	1.84	156	355	0.326	178	86

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