Xinqi Yang

Southwest Petroleum University

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Wenshen Tang

Tianjin University

Lei Cui

Tianjin University

Shengli Li

China Agricultural University

Guohong Luan

Commercial Aircraft Corporation of China (China)

Chaobo Tian

Tianjin University

Huijun Li

University of Wollongong

Boxue Du

Tianjin University

Dongxiao Li

Chongqing University

Caizhi Zhou

University of South Carolina

Guang Zhou

Guizhou University

Cooperative Institutions

Tianjin University

Chinese Academy of Sciences

Shanghai Jiao Tong University

University of Chinese Academy of Sciences

Central South University

University of Science and Technology of China

Southwest Petroleum University

Xi'an Jiaotong University

Huazhong University of Science and Technology

Peking University

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Effect of rotation speed on microstructure and mechanical anisotropy of Al-5083 alloy builds fabricated by friction extrusion additive manufacturing

Materials Science and Engineering A (2022)

Wenshen Tang Xinqi Yang Chaobo Tian Chao Gu

10.1016/j.msea.2022.144237

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Citations (26)

Numerical Simulation on the Safety and Quality of Cementing by Using Pad Fluid in Horizontal Wells

Energies (2023)

Ben Qi Jiawen Fu Jinfei Sun Zaoyuan Li Xinqi Yang

The failure of wellbore sealing will cause leakage of greenhouse gases, such as carbon dioxide and methane, which will harm oil and gas recovery and environmental safety. Cementing is an important part of wellbore sealing. Only good cementing can keep the wellbore seal for a long time and improve the well life. In this study, we considered the construction of a horizontal shale oil well in eastern China as the background and analysed the rheological properties of the annulus fluid. We developed a displacement motion model and a calculation model for the annulus dynamic equivalent circulation density, and numerical simulations were used to study the impact of the dosage and injection sequence of the pad fluid on the displacement efficiency and annulus dynamic equivalent circulation density. The results show that when the pad fluid is composed completely of flushing fluid, the displacement performance is better than that of the spacer. By increasing the dosage of the flushing fluid from 0.3 times the annular volume to 1.0 times, the displacement efficiency can be increased by 3.3%, and the retention of the drilling fluid is also reduced by 3.6%. However, it can lead to a significant reduction in the annulus dynamic equivalent circulation density and increase in the risk of leakage. After adding the spacer, the structure of the flushing fluid–spacer provides the optimal injection sequence. Considering the application status in the field example well, it was shown that it can not only ensure the safety of cementing operations, but also improve the displacement efficiency. The results of this study have important theoretical significance and application value and can provide guidance for the optimisation design of the engineering scheme.

Annulus (botany)

Flushing

Lost Circulation

Underbalanced drilling

Wellbore

Leakage (economics)

10.3390/en16093650

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Citations (1)

Dual-functional graphitic carbon materials from methane pyrolysis for lithium-ion batteries

Carbon (2025)

Justin Prabowo Yuqi Pan Zhi Zheng Leo Lai Xinqi Yang

Carbon fibers

10.1016/j.carbon.2025.120038

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Effect of mismatching on J-integral for pipe-welded joints with circumferential through-wall crack

International Journal of Pressure Vessels and Piping (1999)

Yueli Liu Lixing Huo Yufeng Zhang Xinqi Yang

J integral

10.1016/s0308-0161(99)00056-3

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Citations (2)

Study on the J-Integral Failure Assessment Curve of Heterogeneous Welded Joints

Key engineering materials (1997)

Li Xing Huo Xinqi Yang You Feng Zhang

J integral

Failure assessment

10.4028/www.scientific.net/kem.145-149.13

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Citations (0)

FMUnet: Frequency Feature Enhancement Multi-level U-Net for Low-Dose CT Denoising with a Real Collected LDCT Image Dataset

Lecture notes in computer science (2024)

Yu Shrike Zhang Xinqi Yang Guoliang Gong Xianghong Meng Xiaoliang Wang

Feature (linguistics)

Net (polyhedron)

10.1007/978-981-97-5600-1_15

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The influence of zigzag-curve defect on the fatigue properties of friction stir welds in 7075-T6 Al alloy

Materials Chemistry and Physics (2007)

Shusheng Di Xinqi Yang Fang Da-peng Guohong Luan

Friction Stir Welding

Fatigue limit

Zigzag

Eurocode

10.1016/j.matchemphys.2007.01.023

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Citations (58)

Study on Microstructure and Properties of Friction Stir Welded Lap Joints of Aluminum Alloy

Rejiagong gongyi (2010)

Xiaodong Xu Xinqi Yang Wu Tie Zhang Jialong

The 3003 aluminum alloy was welded by friction stir lap welding.The process,microstructure and properties of welded joint were analyzed.The results show that the welded joints can be divided into three regions with distinctive features,such as weld nugget zone,thermo-mechanical affected zone and heat affected zone,when the rotational speed is 1120 r/min and the welding speed is 50 mm/min,the good shape of welds can be achieved,if the welding parameters are not proper,trench,fly edgy and tunnel defects appear.Meanwhile,the tensile strengths of the aluminum welded at the rotational speed with different welding speed are all higher,which can generally reach above 75% of tensile strength of the matrix material.The vickers hardness in nugget is higher than other zone,sometimes,it is even higher than the matrix.The lowest vickers hardness appears in HAZ of advancing side of the top sheet.

Vickers hardness test

Friction Stir Welding

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Fabricating Defect-Free API X65 Steel Welds under Underwater Wet Conditions using Friction Taper Plug Welding

Materials and Manufacturing Processes (2016)

Feixiang Wang Xinqi Yang Lei Cui Yayun Yin

The experiment on API X65 steel was carried out using friction taper plug welding (FTPW) under underwater wet conditions at room temperature. Sound weld formation can be achieved vastly at axial force ranging from 25 to 40 kN and a rotating speed of 7000 rpm. The microstructure of the weld zone consists of lath martensite, upper bainite, granular bainite, polygonal ferrite, and acicular ferrite. The microstructure of heat affected zone (HAZ) mainly consists of lath bainite as well as a bit of lath martensite and granular bainite. The tensile properties of defect-free welds are excellent. The maximum impact energy of the V-notch of bonding area can reach 110 J, which was conducted at 0°C with an error of ±12.5 J. The typical SEM impact fracture morphology presents areas of cleavage, quasi-cleavage, and dimples.

Acicular ferrite

Lath

Austempering

Dimple

Microalloyed steel

10.1080/10426914.2016.1176194

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Citations (7)

Stress analysis of beam-to-column connection for earthquake-resistance welded steel structure based on FEM

ICF10, Honolulu (USA) 2001 (2013)

Yufeng Zhang Yao Guochun Huo Lixing Xinqi Yang Jing Hongyang

Brittle fracture of beam-to-column connection in steel construction under earthquake loading is affected greatly by the type of welded joints. In this study the artificial crack is formed by lack of fusion in the flange weld of beam in the beam-to-column connection, based on the model of typical beam-to-column connection in China, the stress distributions of connections have been computed by three-dimensional finite element method. It is concluded that stresses of connections could be reduced by connection reinforcement. Among reinforcements it is the most effective way to improve stress concentration at the root of flange weld by adding upstanding ribs on outside beam flange. In addition, stresses of hot spots in the connection without crack were computed first, then based on the driving force of crack calculated by formula of SIF, the stress intensity factors, KI are obtained for cracks with 3 or 6 mm deep and with the length equal to width of beam web under two states, with or without residual stresses. Load equal to plastic moment of beam was assumed on this beam end to simulate moment loading under earthquake. Meantime the least fracture toughness of reinforced connection with cover plate to avoid brittle fracture is given among several reinforced forms. The analysis results can be used for earthquake-resistance design of beam-to-column connection of steel structure.

Flange

Brittleness

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