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Additively manufactured fiber-reinforced composites:A review of mechanical behavior and opportunities

Journal of Materials Science & technology 2022年第24期119卷 219-244页

作者： Jiahui Li Yvonne Durandet Xiaodong Huang Guangyong Sun Dong Ruan Department of Mechanical Engineering and Product Design Engineering School of EngineeringSwinburne University of TechnologyHawthornVIC 3122Australia State Key Laboratory of Advanced Design and Manufacture for Vehicle Body Hunan UniversityChangsha 410082China

Recent developments in additive manufacturing techniques have facilitated the fabrication of fiberreinforced composite *** this paper,the mechanical properties and deformation mechanisms of discontinuous and continuous fiber-reinforced composites fabricated by various additive manufacturing techniques are comprehensively *** effects of fiber type,orientation and weight/volume fraction,printing path,and stacking sequence on the mechanical properties of additively manufactured composites are *** addition,the applications of additively manufactured composites,the main challenges of the current additive manufacturing techniques,and recommendations for future work are also presented.

关键词： Additive manufacturing Discontinuous and continuous fiber-reinforced composites Mechanical properties Deformation mechanism Applications

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A Review on safety Management Strategies: Theory and Practical Application of Lithium-Ion Power Batteries 8th

A Review on Safety Management Strategies: Theory and Practic...

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8th International Conference on Advances in Construction Machinery and vehicle engineering, ICACMVE 2023

作者： Yi, Xiaojian Hu, Lin Liu, Shuang Zou, Changfu School of Traffic and Transportation Engineering Changsha University of Science and Technology Changsha410114 China School of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha410114 China Hunan Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China Department of Electrical Engineering Chalmers University of Technology Gothenburg41296 Sweden

ISBN: (纸本)9789819718757

Battery safety in electric vehicles is a comprehensive engineering endeavor that requires meticulous consideration at every stage, including battery materials, battery pack design, and battery management systems (BMS). This review focuses on safety management strategies and practical applications of lithium-ion power batteries. The management of battery safety primarily encompasses charge and discharge safety, high-voltage safety, and thermal safety. Among these, charge and discharge safety management aims to prevent battery damage or safety incidents caused by overcharge or over discharge. High-voltage safety management involves detecting insulation faults, overcurrent, and other potential risks to prevent electrical hazards. Thermal safety management ensures individual battery cells, modules, and the battery pack maintain an optimal operating temperature range and uniform temperature distribution, thereby preventing thermal runaway. © The Author(s) 2024.

关键词： Lithium-ion batteries

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Connector configuration effect on the dynamic characteristics of multi-modular floating structure

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Journal of Ocean engineering and Science 2024年第6期9卷 517-527页

作者： Rui Ding Haicheng Zhang Chunrong Liu Daolin Xu Qijia Shi Jiarui Liu Weisheng Zou Yousheng Wu State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082PR China Xiamen University of Technology Xiamen 361024PR China China Ship Scientific Research Center Wuxi 214082PR China

In this study,a wave flume experiment is implemented in order to investigate the effect of connector topology on the dynamic characteristics of a modular floating *** configurations of flexible connectors were designed for the experiment tests of a three-modular floating platform under various wave *** results illustrate the module responses,relative displacements of connecting points between adjacent modules,and connector loads for floating structures with different types of connectors in the parameters region of non-dimensional module *** comparison study demonstrates that the connector type III,which can provide appropriate constraint stiffness in all three degrees of freedom,generally delivers better dynamic stability to the floating *** longitudinal loads for the three types of connectors remain at the same ***,the mechanism of different types of connec-tors on the dynamic features of system is *** work can provide a few experimental guidelines for the connector design of floating structure in engineering practice.

关键词： Floating structure Connector topology Dynamic characteristics Wave flume experiment

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design and Performance Analysis of HMDV Dynamic Inertial Suspension Based on Active Disturbance Rejection Control

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Computer Modeling in engineering & Sciences 2024年第8期140卷 1485-1506页

作者： Xiaofeng Yang Wei Wang Yujie Shen Changning Liu Tianyi Zhang School of Automotive and Traffic Engineering Jiangsu UniversityZhenjiang212013China Automotive Engineering Research Institute Jiangsu UniversityZhenjiang212013China Chongqing Key Laboratory of Urban Rail Transit System Integration and Control Chongqing400074China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan universityChangsha410082China

This paper addresses the impact of vertical vibration negative effects,unbalanced radial forces generated by the static eccentricity of the hub motor,and road excitation on the suspension performance of Hub Motor Driven vehicle(HMDV).A dynamic inertial suspension based on Active Disturbance Rejection Control(ADRC)is proposed,combining the vertical dynamic characteristics of dynamic inertial suspension with the features of ADRC,which distinguishes between internal and external disturbances and arranges the transition ***,a simulation model of the static eccentricity of the hub motor is established to simulate the unbalanced radial electromagnetic force generated under static eccentricity.A quarter-vehicle model of an HMDV with a controllable dynamic inertial suspension is then ***,the passive suspension model is studied under different grades of road excitation,and the impact mechanism of suspension performance at speeds of 0–20 m/s is ***,the three main components within the ADRC controller are designed for the second-order controlled system,and optimization algorithms are used to optimize its internal ***,the performance of the traditional passive suspension,the PID-based controllable dynamic inertial suspension,and the ADRC-based controllable dynamic inertial suspension are analyzed under different road *** results show that,under sinusoidal road input,the ADRC-based controllable dynamic inertial suspension exhibits a 52.3%reduction in the low-frequency resonance peak in the vehicle body acceleration gain diagram compared to the traditional passive suspension,with significant performance optimization in the high-frequency *** random road input,the ADRC-based controllable dynamic inertial suspension achieves a 29.53%reduction in the root mean square value of vehicle body acceleration and a 14.87%reduction in dynamic tire *** indicates that the designed controllable dynamic inertia

关键词： HMDV static eccentricity ADRC dynamic inertial suspension road excitation

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A Research of Different Energy Management Strategies of Lithium-ion Battery-Ultracapacitor Hybrid Energy Storage System 8th

A Research of Different Energy Management Strategies of Lith...

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8th International Conference on Advances in Construction Machinery and vehicle engineering, ICACMVE 2023

作者： Zhang, Dongjie Hu, Lin Tian, Qingtao Zou, Changfu School of Automotive and Mechanical Engineering Changsha University of Science and Technology Changsha410114 China Hunan Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and Technology Changsha410114 China School of Traffic and Transportation Engineering Changsha University of Science and Technology Changsha410114 China Department of Electrical Engineering Chalmers University of Technology Gothenburg41296 Sweden

ISBN: (纸本)9789819718757

Given the exacerbating effect of fossil fuel use in conventional vehicles on the greenhouse effect, the imperative development of electric vehicle technology becomes evident. To address the high energy and power density demands of electric vehicles, a lithium-ion battery-ultracapacitor hybrid energy storage system proves effective. This study, utilizing ADVISOR and Matlab/Simulink, employs an electric vehicle prototype for modeling and simulating both logic threshold and fuzzy logic control strategies. It aims to analyze the average output power and state of charge (SOC) of the lithium-ion battery, as well as the SOC of the ultracapacitor, within hybrid energy storage systems governed by these differing strategies. The findings indicate that the fuzzy logic control strategy results in a reduction of 2.73 kW in the average output power of the lithium-ion battery and a 20% increase in the SOC drop rate of the ultracapacitor compared to the logic threshold control strategy. Under the logic threshold control strategy, lithium-ion batteries demonstrate superior output stability, albeit within a broader amplitude range. Conversely, the fuzzy logic control strategy maximizes the utilization of ultracapacitors but leads to frequent fluctuations in the output power of lithium-ion batteries, thereby exhibiting reduced stability. These results underscore the inherent trade-offs between stability and utilization efficiency in hybrid energy storage systems for electric vehicles under different control strategies. The selection of a control strategy should be contingent upon specific performance priorities and objectives within the context of electric vehicle design and operation. © The Author(s) 2024.

关键词： Lithium-ion batteries

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A Finite Element Human Body Model of Chinese Midsize Male for Pedestrian safety Analysis

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Journal of Bionic engineering 2024年第6期21卷 2924-2941页

作者： Fuhao Mo Ziyang Liang Tengfei Tian Guibing Li Zhi Xiao Sen Xiao State Key Laboratory of Advanced Design and Manufacture for Vehicle Hunan UniversityChangsha410082China Department of Orthopedics The Second Xiangya Hospital of Central South UniversityChangsha410011China Department of Tuina and Spinal Orthopaedics in Chinese Medicine Shenzhen Traditional Chinese Medicine HospitalThe Fourth Clinical Medical College of Guangzhou University of Chinese MedicineShenzhen518033China Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles Hebei University of TechnologyTianjin300401China School of Mechanical Engineering Hunan University of Science and TechnologyXiangtan411201China

The anthropometric differences between European/American and Chinese population are remarkable and have significant influences on pedestrian kinematics and injury response in vehicle ***,the current study aims to develop and validate a Finite Element(FE)human body model representing the anthropometry of Chinese 50th percentile adult male for pedestrian safety analysis and development of Chinese ATDs(Anthropomorphic Test Devices).Firstly,a human body pedestrian model,named as C-HBM(Chinese Human Body Model),was developed based on the medical image data of a volunteer selected according to both anthropometry and anatomy characteristics of 50th percentile Chinese adult ***,the biofidelity of the C-HBM pedestrian model was validated against cadaver impact test data reported in the literature at the segment and full-body ***,the validated C-HBM pedestrian model was employed to predict Chinese pedestrian injuries in real world vehicle *** results indicate that the C-HBM pedestrian model has a good capability in predicting human body mechanical response in cadaver tests and Chinese leg and thorax injuries in vehicle *** analysis shows that the C-HBM pedestrian model has less sliding on the hood surface,shorter movement in the horizontal direction,and higher pelvis displacement in the vertical direction than cadavers and the pedestrian model in the anthropometry of westerner due to anthropometric differences in the lower *** currently developed C-HBM pedestrian model provides a basic tool for vehicle safety design and evaluation in China market,and for development of Chinese ATDs.

关键词： Biomechanics Chinese human body model Pedestrian safety Finite element modeling

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Unexpected effects on creep resistance of an extruded Mg-Bi alloy by Zn and Ca co-addition:Experimental studies and first-principles calculations

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Journal of Materials Science & technology 2024年第34期201卷 166-186页

作者： Zhenyu Xiao Shiwei Xu Weiying Huang Haifeng Liu Xuyue Yang Haikun Xu Chao Ma Chen Jin Zhanhong Lin College of Materials Science and Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan UniversityChangsha 410082China Suzhou Research Institute of Hunan University Suzhou 215131China College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China Hunan Jinfeng Machinery Technology Co.Ltd. Loudi 417000China Key Laboratory of Efficient&Clean Energy Utilization School of Energy and Power EngineeringChangsha University of Science&TechnologyChangsha 410114China College of Materials Science and Engineering Central South UniversityChangsha 410083China Information and Network Center Central South UniversityChangsha 410083China Qinghai Salt Lake Teli Magnesium Co.Ltd. Xining 810000China

In the present work,a new Mg-Bi based alloy is developed by the addition of Zn and Ca in equiva-lent atom fraction with ***-Bi and Mg-Bi-Zn-Ca alloys were prepared by extrusion at a ram speed of 20 mm/*** temperature mechanical properties and creep behaviors at 423 K were *** results show that Zn and Ca co-addition shows little influence on average grain size and texture in-tensity but changes the dispersive Mg_(3)Bi_(2)into Mg_(2)Bi_(2)Ca particles in different sizes and a lower *** is largely activated during room-temperature ***,a slightly decreased proof strength but tripled elongation is shown at room ***,large enhancement in creep resistance is detected after the co-alloying of Zn and Ca and the minimum creep rate is reduced by 10 to 20 times in the BZX621 *** exponent n=4-5 indicates that the creep is a dislocation-climb controlled ***-mortem characterization on microstructure shows slip of dislocationc+aare also largely found in B6 as well as BZX621 alloy and cross-slip is detected more severe in B6 *** segregation and precipitation are also seen in both ***-clusters are seen dispersive across the grains in B6 and so did the PFZs that could undermine creep resistance at the grain *** contrast,Zn-rich needle-like precipitates are developed at most“ends”ofc+adislocations,which would hinder the further dislocation motions and thus improve the creep ***-principles cal-culations were adopted and the results show that the thermal stability and thermomechanical properties of Mg_(2)Bi_(2)Ca are much better than that of Mg_(3)Bi_(2).Stacking faults energy is lowered down with the co-addition of Ca and Zn,which could inhibit the rate of dislocation climb and *** a result,the im-proved creep resistance is obtained in the Mg-Bi-Zn-Ca *** and controlling mechanism changes by thermal activation result in the unexpe

关键词： Creep resistance First-principles calculations Mg-Bi alloy Microstructure SFE

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Advances in multi-scale design and fabrication processes for thick electrodes in lithium-ion batteries

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Energy Reviews 2024年第2期3卷 14-30页

作者： Xiuxue Liu Yubin Zeng Wei Yuan Guanhua Zhang Huai Zheng Zhongxue Chen Key Laboratory of Hydraulic Machinery Transients Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan430072China School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510640GuangdongChina State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou511300China

In the contemporary era,lithium-ion batteries have gained considerable attention in various industries such as 3C products,electric vehicles and energy storage systems due to their exceptional *** the rapid progress in the energy storage sector,there is a growing demand for greater energy density in lithium-ion *** the use of thick electrodes is a straightforward and effective approach to enhance the energy density of battery,it is hindered by the sluggish reaction dynamics and insufficient mechanical ***,we comprehensively review recent advances in the field of thick electrodes for lithium-ion batteries to overcome the bottlenecks in the development of thick electrodes and achieve efficient fabrication for high-performance lithium-ion ***,a systematic analysis is performed to identify the factors affecting the performance of the thick *** correlation between electrode materials,structural parameters,and performance is also ***,the viable strategies for constructing thick electrodes with improved properties are summarize,including high throughput,high conductivity and low tortuosity,in both material development and structural *** addition,recent advances in efficient fabrication methods for thick electrode fabrication are reviewed,with a comprehensive assessment of their merits,limitations,and applicable ***,a comprehensive overview of the multiscale design and manufacturing process for thick electrodes in lithium-ion batteries is provided,accompanied by valuable insights into design considerations that are crucial for future advances in this area.

关键词： Lithium-ion battery Thick electrode High energy density Electrode structure Multi-scale design Material development

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Multimodal element(including lithium)mapping in a Mg-9Li-4Al-1Zn alloy

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Journal of Magnesium and Alloys 2024年第11期12卷 4468-4480页

作者： Yu Zhang Yang Liu Zhuoran Zeng Nick Birbilis Philip N.H.Nakashima Laure Bourgeois Department of Materials Science and Engineering Monash UniversityVIC 3800Australia Monash Centre for Electron Microscopy Monash UniversityVIC 3800Australia College of Materials Science and Engineering Hunan UniversityChangsha 410082China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan UniversityChangsha 410082China Suzhou Research Institute of Hunan University Suzhou 215131China Faculty of Science Engineering and Built EnvironmentDeakin UniversityVIC 3125Australia

Determining the distribution of alloying elements,particularly lithium,is crucial for a holistic understanding of magnesium-lithium-based *** this work,a bespoke ratio spectrum-imaging method based on electron energy-loss spectroscopy,in combination with time-of-flight secondary ion mass spectrometry,energy-dispersive X-ray spectroscopy and Z-contrast imaging,was applied to an as-rolled LAZ941 alloy(Mg-9Li-4Al-1Zn in wt.%).This was done to characterize the distribution of alloying elements,including the distribution of solute in the magnesium *** applications of different mapping techniques revealed that precipitates with two different morphologies are rich in Li,Al and Zn,compared to their surrounding ***,it was confirmed that theβ-phase of the alloy contains higher Li and lower Mg concentrations when compared to theα-*** study demonstrated the effectiveness and accuracy of the ratio spectrum-imaging method for mapping the elemental distribution(including lithium)in a range of Li-containing materials.

关键词： Magnesium alloys Lithium distribution mapping Solute content mapping Phase determination Electron energy-loss spectroscopy(EELS) Time-of-flight secondary ion mass spectrometry(ToF-SIMS) Scanning transmission electron microscopy(STEM)

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Corrosion evolution and behaviour of Al-2.1Mg-1.6Si alloy in chloride media

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Rare Metals 2021年第4期40卷 908-919页

作者： Ya-Ya Zheng Bing-Hui Luo Chuan He Yang Gao Zhen-Hai Bai College of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and TechnologyChangsha 410114China

Owing to the importance of finding better methods and technologies for protecting against corrosion of aluminium alloys,research into the electrochemical characteristics of the corrosion is an ongoing *** this paper,the corrosion behaviour of Al-Mg-Si alloys in 3.5 wt% NaCl solution was investigated using multiple methods,including scanning electron microscopy(SEM),transmission electron microscopy(TEM),potentiodynamic polarisation measurement and electrochemical impedance spectroscopy(EIS).The results suggest that corrosion begins with dealloying of Mg,followed by conversion of MgSi particles into Al-Fe-Mn-Si *** corrosion rate increased until it reached a peak and then *** increase in the corrosion rate may be attributed to an increased electrochemical driving force,which is produced by anodic dissolution between the matrix and residual MgSi ***,the thin re-deposited layer of inert elements also plays an important role in accelerating the anodic process of the corrosion *** passivated corrosion pit and narrowed intergranular corrosion(IGC)pathway cause the area of active dissolution to decrease,thus reducing the corrosion rate.

关键词： Al-Mg-Si alloys Corrosion behaviour Electrochemical Corrosion rate IGC corrosion pathway

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