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Fatigue crack Propagation in Steel A131 Under Ice Loading of Crushing,Bending and Buckling

China Ocean Engineering 2001年第3期16卷 315-328页

作者：段梦兰樊晓东宋立崧方华灿 James C. M. LI R. & D. Center China Classification Society Shanghai Offshore Petroleum Bureau China National Offshore Oil Co. University of Petroleum University of Rochester Rochester

Three types of ice loading, which are most commonly present when ice acts on structures, are chosen and simulated for use of fatigue crack propagation tests on offshore structural steel A131. The three types of ice categorized in accordance with the failure modes when acting on structures called Crushing ice, bending ice, and buckling ice, respectively. This paper presents an experimental investigation on the fatigue crack propagation behavior of widely used high strength steel A131 for offshore jackets in the loading environment of ice crushing, bending, and buckling. The test results of fatigue crack propagation in steel A131 tinder these simulated ice loading at temperature 292K are presented and analyzed in detail in this paper, The amplitude root mean square stress intensity factor is optimized to be the fundamental parameter of fatigue crack propagation for all types of ice loading histories. The results are also compared with constant amplitude fatigue crack propagation conclusions as in wave load mode, and a joint investigation on the results from ice forces, ice-induced vibrations, and ice-induced fatigue crack propagation is conducted. Conclusions are drawn for reference in structural design and material selection for offshore structures in ice environments.

关键词： fatigue crack crack growth rate stress intensity factor ice loading temperature steel A131 test

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crack growth BEHAVIOR IN TITANIUM ALLOY TC11 AT ROOM AND HIGH TEMPERATURES

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Acta Metallurgica Sinica(English Letters) 1999年第1期12卷 80-84页

作者： H.F. Huang and S.L. Liu Laboratory of Material Mechanical Properties, Beijing Institute of Aeronautical Materials (BIAM), Beijing 100095, China

This paper presents some new results of a research on the fatigue crack propagation (FCP) behavior in the titanium alloy TC11. crack propagation tests were carried out at room temperature by center cracked tension (CCT) specimens under three stress ratios of R=0, 0.5, -1, and at 400 by compact tension (CT) and single edged specimens under stress ratios of R=0.1 and -1, respectively. The crack growth rates were compared by using stress intensity factor and effective stress intensity factor. The results show that the effects of stress ratio and ambient temperature on crack growth rates decreased if they were correlated by using the effective stress intensity factor.

关键词： fatigue crack growth crack growth rate titanium alloy

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EFFECIS OF TEMPERATURE AND OVERLOAD RETARDATION ON CORROSION FATIGUE crack growth OF HIGH STRENGTH STEEL

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Acta Metallurgica Sinica(English Letters) 1990年第3期3卷 204-207页

作者： QIAN Yourong HE Xiangdong Beijing University of Aeronautics and Astronautics,Beijing,China QIAN Yourong,Dept.of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China

The fatigue crack growth rate (CGR) of ultra high strength steel 30CrMnSiNi2A in distilled water at 18,35 and 55℃ were *** was confirmed that the temperature is strongly af- fected on the corrosion fatigue CGR of ultra high strength *** expression concerning the effects of Δ K and temperature on the CGR was *** fact that the apparent activation energy (36.6 kJ/mol) resulted from regressive analysis of CGR data was similar to the activation energy of hydrogen diffusion in γ-Fe,strongly supporting the theory of hydrogen-assisted crack *** overload retardation effect was greatly reduced in cor- rosion fatigue crack growth,especially at lower frequency,e.g.,0.1 *** phenomenon might be due to the increase of the SCC component of CGR after an overload.

关键词： corrosion fatigue crack growth rate temperature effect overload retardation effect

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Safety Evaluation of High Pressure Vessel under Corrosive and Fatigue Environment of Sulfureted Hydrogen

Safety Evaluation of High Pressure Vessel under Corrosive an...

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2004安全科学与技术国际会议

作者： WANG Qinmeng SHAN Xiaoping ZHANG Yiliang & ZHANG Wei (Department of Mechanical Engineering Beijing University of Technology Beijing 100022 China)

Fatigue crack growth rate da/dN of the material 4130X steel, which is used to manufacture the high-pressure vessel, in moderate concentration (20010-6) sulfureted hydrogen solution is studied experime

关键词： allowable crack size corrosive fatigue of sulfureted hydrogen crack growth rate probability analysis

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Fatigue crack growth Behavior of Advanced Some High Strength Steels

Fatigue Crack Growth Behavior of Advanced Some High Strength...

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2014中国汽车工程学会年会

作者： Zhang Yu Tang Weiqin Li Dayong Zhang Shaorui Su Xuming Song Yuzhao Huang Shiyao Peng Yinghong School of Mechanical Engineering Shanghai Jiao Tong University Research and Advanced Engineering Laboratory Ford Motor Company

To study the crack growth behavior of advanced high strength steels（AHSSs）,crack growth tests were conducted with different AHSSs,including DP800,quenched boron steel and unquenched boron *** results showed that crack growth in AHSSs can be categorized into three stages;crack initiation stage,stable growth stage and unstable growth *** the stable growth stage,there were only little differences among the crack growth rates of different ***,several crack propagation laws were analyzed to study the crack growth *** results indicated that these laws depicted different crack growth stages,and the fitted curves could agree with experimental results in stable crack growth stage.

关键词： advanced high strength steel fatigue crack growth crack propagation law crack growth stage crack growth rate

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