Jinheng Luo

China National Petroleum Corporation (China)

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Gang Wu

China National Petroleum Corporation (China)

Lifeng Li

Institute of Physics

Lixia Zhu

China National Petroleum Corporation (China)

Yongnan Chen

Chang'an University

Xinwei Zhao

Tongji University

Nan Wang

Shanxi University

Qinyang Zhao

Chang'an University

Guangli Zhang

Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

Zhen Zhang

Chang'an University

Shuxin Zhang

China National Petroleum Corporation (China)

Cooperative Institutions

China National Petroleum Corporation (China)

Chinese Academy of Sciences

Chang'an University

Northeastern University

University of Chinese Academy of Sciences

Northwestern Polytechnical University

China University of Petroleum, Beijing

Shanghai Jiao Tong University

University of Science and Technology Beijing

Sichuan University

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Combining precursor and Cloud Leaky noisy-OR logic gate Bayesian network for dynamic probability analysis of major accidents in the oil depots

Reliability Engineering & System Safety (2023)

Shuyi Xie Zimeng Huang Gang Wu Jinheng Luo Lifeng Li

Dynamic Bayesian network

Logic model

10.1016/j.ress.2023.109625

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Citations (7)

Impact of improving design factor over 0.72 on the safety and reliability of gas pipelines and feasibility justification

Chinese Journal of Mechanical Engineering (2012)

Xinwei Zhao Guangli Zhang Jinheng Luo Hua Zhang

Safety factor

Factor (programming language)

10.3901/cjme.2012.01.166

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Citations (4)

Effect of Pre-Deformation on Fatigue Crack Propagation Life of X60 Pipeline Steel

Volume 2: Integrity Management; Poster Session; Student Paper Competition (2006)

Xinwei Zhao Jinheng Luo Rong Wang Maosheng Zheng Baosheng Dong

It is impossible to keep oil and gas pipeline free from defects in fabrication, installation and serving processes. Mechanical damage is one of import causes of pipeline failure accidents. Mechanical damage might endanger the safety of pipelines and even shorten their service life. Pre-tensile deformation of X60 steel is employed to experimentally simulate the influence of dents on the fatigue crack initiation life. The investigation indicates that the fatigue crack propagation life of pre-deformed X60 pipeline steel can be predicted using a previously proposed equation, i.e., da/dN = B(ΔK − ΔKth)2. The threshold ΔKth for fatigue crack propagation decreases with the pre-deformation. The fatigue crack propagation coefficient B increases with the pre-deformation. So pre-deformation accelerates fatigue crack propagation and shortens fatigue life. The result is expected to be beneficial to the understanding of the effect of dents on the safety of pipelines and fatigue life prediction.

Service life

10.1115/ipc2006-10192

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Stress analysis method of weld angular distortion for spiral welding pipeline

Transactions of the China Welding Institution (2004)

Zhao Xin-wei Jinheng Luo

Since the stress concentration analysis of weld angular distortion in spiral welding pipeline concerns complicated three-dimensional mechanics issues , there are no formulae and methods available for it in published literatures. Mechanics model for the stress analysis of spiral weld angular distortion has been established in this paper. Based on the reported theoretic formulae for stress analysis of straight weld angular distortion , additional bending stress and the maximum stress calculation formulae due to spiral weld angular distortion were suggested through combining theoretic analysis with FEM simulation calculating and validating. The determination method for limit of spiral weld angular distortion was given to provide theoretic basis for quality control and safety assessment of spiral welding pipeline.

Distortion (music)

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Integration of multistructured microcapsules with self-healing and antimicrobial properties into polymer coatings for enhanced metal surface protection

Colloids and Surfaces A Physicochemical and Engineering Aspects (2024)

Jinheng Luo Yufei Tang Lixia Zhu Gang Wu Yan Ma

Self-healing material

10.1016/j.colsurfa.2024.135895

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X90ガスパイプの亀裂伝搬と停止シミュレーション【Powered by NICT】

International Journal of Pressure Vessels and Piping (2017)

Yang Fengping Chunyong Huo Jinheng Luo He Li Yang Li

Source

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Investigation on micromechanism involved in ferrite hardening after prestraining of dual-phase steel

Materials Science and Engineering A (2020)

Nan Wang Yongnan Chen Gang Wu Zhen Zhang Zhicheng Wu

Hardening (computing)

Strain hardening exponent

Brittleness

Work hardening

Dual-phase steel

10.1016/j.msea.2020.140387

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Citations (19)

Investigating Erosion of String in Underground Hydrogen Storage under High Flow Velocity

Processes (2023)

Lixia Zhu Lifeng Li Jinheng Luo Ziyue Han Shuyi Xie

Underground hydrogen storage represents an innovative approach to energy storage. To ensure the secure operation of subterranean hydrogen storage strings, a computational fluid dynamics (CFD) methodology was employed to devise an erosion assessment model tailored for high-velocity conditions. The research delved into the erosion and abrasion dynamics of these storage strings when subjected to high-speed gas flows. This study further examined the impacts of gas velocity, particle size, pipe material, and pipe wall corrosion imperfections on flow patterns and erosion wear rates across the column. The outcomes revealed several noteworthy trends. As fluid velocity increased, the flow field’s maximum pressure augmented, while it decreased alongside enlarging pipe diameter and particle size. P110 pipe material exhibited higher maximum pressure in comparison to N80. The effect of centrifugal force induced pressure to surge from the inner to the outer portion of the column. In the curved pipe section’s outer wall, the frequent occurrence of high-angle collisions engendered elevated rates of erosion wear over time. Particularly noteworthy was the observation of the highest erosion rate in curved pipes showcasing three corrosion defects, attributed to the backflow effects of erosion pits.

Backflow

Abrasion (mechanical)

Particle (ecology)

Particle velocity

10.3390/pr11102894

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Characterizing relaxation phenomenon and crack propagation during low-temperature harmonic vibrations in heterogeneous metals

Journal of Materials Research and Technology (2023)

Jiangyuan Fan Nan Wang Bingkun Ning Yongnan Chen Gang Wu

This work reveals the relaxation phenomenon induced by the localized atomic segregation during harmonic vibrations, which engenders substantial fluctuations in the dynamic modulus. The relaxation peak occurs when the dynamic modulus undergoes a sudden increase upon temperature reduction to -20°C. This occurrence is caused by interstitial carbon atoms undergoing segregation and dragging dislocations to accumulate near grain boundaries. It leads to an increase in elastic strain energy, resulting in local stress concentrations and cracks initiation in heat affected zone (HAZ) and weld zone (WZ). The elevated value of the dynamic modulus within the HAZ facilitates a substantial internal accumulation of elastic strain energy. Consequently, this accumulation allows cracks to propagate rapidly along grain boundaries within the HAZ. Secondary cracks form in dispersed localized stress concentration zones in the WZ, which can inhibit crack propagation during harmonic vibration. This work will provide detailed insights and theoretical studies on the harmonic vibrational behavior of heterogeneous metals at low temperatures.

Elastic energy

Stress relaxation

10.1016/j.jmrt.2023.09.241

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Fracture Characteristics of 9%Ni Steel at Low Temperature

Qingren Xiong Chunyong Huo Shaotao Gong Jinheng Luo Jiming Zhang

The fracture characteristics of several types of tensile specimens of 9%Ni steel at low temperature was studied, and the Notch (Crack) Sensitivity and Notch (Crack) Relative Strength decreased (increased) Ratio of notch (crack) specimen were studied, while the crack preparation method of the crack specimen was discussed. The results indicate that the Notch (Crack) Sensitivity and Notch (Crack) Relative decreased (increased) Ratio can be used to evaluate the low temperature low stress brittle fracture resistance of the material. 9%Ni steel has good brittle fracture resistance at low temperature. The crack preparation principle of the crack tensile specimen was put forward.

Brittle fracture

Brittleness

10.1115/pvp2015-45203

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