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Numerical and experimental study on failure behavior of steel-aluminium mechanical clinched joints under multiple test conditions

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International Journal of Lightweight Materials and Manufacture 2019年第1期2卷 72-79页

作者： Song, Yanli Yang, Lulu Zhu, Genpeng Hua, Lin Liu, Runze Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China

In this work, the numerical and experimental study was performed to explore the mechanical properties and failure behavior of steel-aluminium mechanical clinched joints under multiple test conditions. The stress distribution of the clinched joints and the failure mode were analyzed using finite element analysis software ABAQUS. The Gurson-Tvergaard-Needleman (GTN) model was used to simulate damage and failure of the joints. The experimental tests were conducted for the verification. It was found that the clinched joints under shear condition had a peak force of 4354N, which was much higher than that of the peel (624N) and cross tensile (1046N) conditions, while the peak load displacement and failure displacement have the opposite law. The failure mode of shear condition was neck fracture, while that of tensile and peel conditions were both pulling out failure. The finite element simulation results were in good agreement with the experimental ones and the failure mode was consistent. The Gurson-tvergaard-Needleman (GTN) model can accurately predict the mechanical properties and failure mode of clinched joints. © 2018 The Authors

关键词： Failure modes

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Picosecond laser ultrasonic imaging detection of near-surface micro defects using PCS and SAFT algorithm

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Ultrasonics 2025年

作者： Kangwen Huang Xiaokai Wang Shutong Dai Yu Peng Yan Zeng Lin Hua Shanyue Guan Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China College of Power Engineering Naval University of Engineering Wuhan 430030 China

The effective detection and imaging of near-surface micro defects has been the key problem in the ultrasonic inspection field for a long time. Laser ultrasound has high resolution and sensitivity which is the effective technology to detect micro defects. In this paper, the time and frequency domain characteristics of the picosecond laser ultrasound and the interaction mechanism between micro defects and ultrasonic waves are studied by simulation and experiment. A picosecond pulsed laser is used to excite ultrasonic waves in samples with near-surface micro defects of different depths, and the propagating ultrasonic waves are detected by an optical interferometer. Through the analysis of the experimental results, the near-surface micro defects with diameters of 0.13 mm and depths of 0.3 mm, 0.5 mm, 1 mm and 2 mm can be detected. In addition, a defect imaging algorithm combining principal component subtraction (PCS) and synthetic aperture focusing technique (SAFT) is proposed, which can effectively suppress the detection blind areas and artifacts caused by Rayleigh (R)-wave interference. Compared with the conventional total focusing method (TFM) of water-immersion ultrasound, the average SNR is increased by 25.57 dB. This research is poised to contribute to the resolution of quality assessment challenges in product manufacturing and service processes.

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Effect of Bearing Structure on Oil-air Flow and Temperature of High Speed Ball Bearing by Combining Nonlinear Dynamic and CFD Model

Research Square

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Research Square 2021年

作者： Deng, Song Zhao, Gui Qiang Qian, Dong-Sheng Hua, Lin Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology Wuhan430070 China Hubei Engineering Research Center for Green Precision Material Forming Wuhan University of Technology Wuhan430070 China

To achieve effective cooling for high speed ball bearings, an investigation on the effect of bearing structure on oil-air flow and temperature inside bearing chamber is necessary. However, accurately defining boundary conditions of CFD model for high speed ball bearings has not been addressed completely. Adopting an improved dynamic model of bearings to calculate movements of balls and power loss to set the movement boundary and heat source of CFD model at high-low speeds and light-heavy loads. Then, rotational speed of cage and temperature of outer ring at various loads are tested to validate this proposed method. At high speeds, enlarging sealing degree of outlet not only reduces the temperature rise of bearings and improves the uniformity of temperature distribution, but also promotes the formation of oil-film on balls’ surfaces without increasing power loss. Yet it can reduce the temperature rise but can’t markedly improve the formation of oil-film at low and ultra-high speeds. Moreover, half birfield cage facing nozzle plays an important role in improving oil volume fraction inside the bearing cavity to reduce the temperature rise of bearings, and the next is birfield cage, they are again corrugated cage and half birfield cage back towards nozzle. These research results provide theoretical guidance for the improvement of bearing structure. © 2021, CC BY.

关键词： Air

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A review of fault diagnosis and fault-tolerant control of vehicular polymer electrolyte membrane fuel cell power system

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Journal of Physics: Conference Series 2022年第1期2206卷

作者： Tongyu Pan Pei Zhang Changqing Du Dongmei Wu Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components(WUT) Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan P.R. China Wuhan China Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components(WUT) Wuhan China

Proton exchange membrane fuel cell (PEMFC) is a promising vehicle power because of its high energy conversion efficiency and pollution-free reactant. However, the complex structure of multi-system coordination makes the correlation between parameters strong, the fault rate is high and the control is difficult. Timely and accurate fault diagnosis and effective fault-tolerant control are of great significance to the stable output and durability of PEMFC system. Firstly, this paper classifies different faults and describes the applicable scenarios of each classification method. Then, the fault diagnosis methods based on experiment, model and data are summarized, and their advantages and disadvantages are compared. Then, the methods and characteristics of hardware fault tolerance and software fault tolerance are analyzed from the point of redundancy, and the application of fault tolerance control in maintaining the stability of PEMFC system is summarized. Finally, the improvement direction and development prospect of fault diagnosis related technology of vehicle PEMFC system are proposed.

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Optimization of the Urea Scr Injector Based on Entropy Generation Minimization and Entransy Dissipation Extremum

SSRN

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SSRN 2022年

作者： Ye, Jiedong Tan, Gangfeng He, Zixuan Alex, Frimpong J. Peng, Dengzhi Zhang, Zhiqing Beibu Gulf University China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan430070 China Mechanical Engineering Department Faculty of Engineering Kumasi Technical University Kumasi Ghana School of Mechanical and Automotive Engineering Guangxi University of Science and Technology Liuzhou545006 China

A urea injection model with a mixer was established, and the heat transfer behavior of the urea-water-solution (UWS) in the pipeline was studied using the ML-CFD method. Through parameter analysis, the influence of the urea injector parameters on NH3 concentration and uniformity was analyzed. To improve the quality of NH3 produced by the UWS, according to the heat transfer efficiency of UWS in the pipeline, the parameters of the urea injector are optimized with the mutil-objectives of entropy generation minimization (EGM) and entransy dissipation extremum (EDE) respectively. The corresponding Pareto front is obtained, and the CFD model is established to compare the application of the two heat transfer indicators in engineering practice. The results show that the EGM method can more effectively optimize the heat transfer in the UWS, but there is a high concentration of NH3 locally. Although the EDE method is weak in optimizing the heat transfer in the UWS, it has a stronger advantage in ensuring NH3 uniformity. In conclusion, both methods can effectively optimize the UWS heat transfer, and a more suitable method can be selected based on the emphasis on different engineering cases. This provides technical support for enhancing the UWS heat transfer. © 2022, The Authors. All rights reserved.

关键词： Urea

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Steer-by-Wire Control System Based on Carsim and Simulink

Steer-by-Wire Control System Based on Carsim and Simulink

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IOT, Electronics and Mechatronics Conference (IEMTRONICS), IEEE International

作者： Haiyuan Wei Jingjing Wang Meng Jian Shengming Mei Miaohua Huang Wuhan University of Technology Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology China Automotive Technology Research Center Co. Ltd. Hubei Key Laboratory of Advanced Technology for Autom otive Components Wuhan University of Technology Hubei Collaborative Innovation Center for Automotive Com ponents Technology Wuhan China China Automotive Data Co. Ltd. China Automotive Technology Research Center Co. Ltd. Tianjin China China Automotive Data Co. Ltd. Tianjin China Wuhan University of Technology Hubei Research Center for New Energy & Intelligent Conne cted Vehicle Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Autom otive Components Wuhan University of Technology Hubei Collaborative Innovation Center for Automotive Com ponents Technology Wuhan China Hubei Key Laboratory of Advanced Technology for Autom otive Components Wuhan University of Technology Hubei Collaborative Innovation Center for Automotive Com ponents Technology Wuhan University of Technology Hubei Research Center for New Energy & Intelligent Conne cted Vehicle Wuhan University of Technology Wuhan China

With the development of artificial intelligence and driverless technology, the steer-by-wire system has become the mainstream direction of future development. Its structure is simple, lightweight, and real-time optimized steering gear ratio according to road conditions, steering road feel, and improved vehicle handling stability and active safety. Therefore, the research on the wire-controlled steering control system has great practical value. It is applied to platforms such as electric vehicles and intelligent networked vehicles to realize unmanned driving and optimize intelligent transportation, which has good application prospects. Based on the analysis of the structure of each component of the steer-by-wire system, this paper established the dynamic models of the steering execution part, the rack and pinion part and the steering wheel part, and completed the simulation model of each part and the three closed-loop control of the motor through Simulink. This paper, finally built a Carsim/Simulink co-simulation platform, integrated the motor control strategy into the vehicle model in Carsim, and verified the following characteristics and fast response characteristics of the steer-by-wire model.

关键词： Analytical models Motor drives Software packages Roads Wheels Transportation Control systems

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Force and strength analysis of FSAE racing suspension based on spatial analytic geometry 6

Force and strength analysis of FSAE racing suspension based ...

引用

2019 6th International Conference on advanced Composite Materials and Manufacturing Engineering, ACMME 2019

作者： Rui, Ren Gong, Bian Fang, Zhigang School of Automobile and Traffic Engineering Wuhan University of Science and Technology Wuhan430065 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan430070 China

Based on spatial analytic geometry, the paper established a mechanical of suspension system, which is aimed at the structure of double transverse arm suspension of FSAE racing car. Combined with the typical driving conditions of the car, we have worked it out with the MATLAB. Based on that, we have made the finite element static checking analysis with ANSYS, which is aimed at providing effective basis for the design and optimization of racing car. © Published under licence by IOP Publishing Ltd.

关键词： automobile suspensions

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Research On Energy Saving and Performance Enhancement of High-End Hydraulic Press With Controllable Accumulator

Research Square

引用

Research Square 2021年

作者： Hua, Lin Xu, Zhicheng Liu, Yanxiong Zhao, Xinhao Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Department of Mechanical Engineering University of Wisconsin-Madison MadisonWI53706 United States

Hydraulic fineblanking press is a kind of high-end hydraulic metal forming devices and widely applied in automotive and appliance industry. However, it suffers from the defeat of high energy consumption low energy efficiency. To solve the problem, this study proposed a power-matching strategy by using a novel controllable accumulator which can control the precharge pressure, output flow with high precision. Firstly, the energy characteristics and working performance requirements of the large-sized fineblanking press in a working cycle were investigated. Then, the energy consumption mathematic model coupling with the controllable accumulator was built for designing the key parameters of the accumulators. Based on the load characteristic and the energy model, a controlling strategy of the controllable accumulator was proposed to reduce the imbalance degree of the supplied and demanded power and improve working performance by designing working route of the controllable accumulator. Finally, a detailed hydraulic schematic was designed and applied on the 1000 ton hydraulic fineblanking press, which was validated with simulation model. The results show that compared to the traditional system, the energy efficiency of the novel system is improved by 20.35% with lowering the input energy by 169.4 kJ. Besides, the vibration magnitude of the slide block is decreased a lot and the working production efficiency is improved by 10% compared to the traditional system. © 2021, CC BY.

关键词： Presses (machine tools)

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Revealing the thermal conductivity and viscosity mechanism of lubricating oil enhanced with nano-silicon carbide using molecular dynamics simulation

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International Journal of Thermal Sciences 2025年 215卷

作者： Hou, Xianjun Chu, Chen Jiang, Hua Guan, Weiwei Ahmed Ali, Mohamed Kamal Hubei Longzhong Laboratory Xiangyang441000 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan4300700 China Automotive and Tractors Engineering Department Faculty of Engineering Minia University El-Minia61519 Egypt State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China

Enhancing the heat transfer capability and understanding the rheological properties of automotive lubricants are essential for improving engine performance and durability. This study investigated the important parameters influencing the above-mentioned performance, namely the thermal conductivity and dynamic viscosity of the nanofluid (NF) based on poly-α-olefin (PAO6) and nano-silicon carbide (SiC) via experiments and molecular dynamics (MD) simulations. The fascinating novelty of this approach lies in exploring the effects of the coating layer formed on nano-SiC within the lubricant interface, as well as its influence on viscosity and the mechanisms that facilitate enhanced heat conduction between lubricant layers. The experiment and MD simulation revealed that NF exhibited shear thinning behavior and the dynamic viscosity values of SiC NF from 20 °C to 60 °C were exponentially reduced. Moreover, the thermal conductivity of NF is improved by 4.7 % and 10.5 % than that of base oils for experiemnt and simulation outcomes, which were influenced by temperatures and nano-SiC concentrations. The distribution diagram of the atom radial distribution function (RDF), based on the structural and interactional data at the molecular level, indicates that the presence of nano-SiC transforms the microstructure from a liquid phase to a nanolaminar solid state. This alteration increases the orderliness of the NF molecules and facilitates more efficient energy exchange, thereby improving their thermal conductivity and viscosity. Finally, this study assists the design of NF in accordance with specified operating requirements. © 2025 Elsevier Masson SAS

关键词： Silicon carbide

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Simulation and Analysis of Vehicle Performance Based on Different Cycle Conditions 6th

Simulation and Analysis of Vehicle Performance Based on Diff...

引用

6th International Conference on Frontier Computing, FC 2018

作者： Wu, Yangmin Liu, Zhien Xi, Guangwei Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China

ISBN: (纸本)9789811336478

In this paper, the vehicle dynamics simulation model of a vehicle model is established according to the structure of the vehicle and the performance parameters of each part of the vehicle, and the performance prediction model of the NEDC cycle, the WLTC cycle, and the China cycle (CHINA VI) are constructed. The differences effects of three test cycle on vehicle dynamics, fuel economy, and vehicle emission performance are studied. And provide a theoretical basis for the matching of engines and vehicles and the selection of different emission technology routes. © 2019, Springer Nature Singapore Pte Ltd.

关键词： Vehicle performance

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