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Natural fibre reinforced composites: A review based on additive manufacturing routes and biodegradability perspective

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materials Today: Proceedings 2022年 62卷 131-135页

作者： Ganguly, Anumoy Shankar, Shiv Das, Ashish Shukla, Mukul Swaroop, Chetan Bhardwaj, Tarun Division of material science and engineering RWTH Aachen University 52074 Germany Department of Production and Industrial Engineering National Institute of Technology Jamshedpur Jharkhand India Department of Mechanical Engineering Motilal Nehru National Institute of Technology Allahabad Prayagraj India Department of Mechanical Engineering United College of Engineering and Research Uttar Pradesh Prayagraj India Department of Mechanical Engineering Ajay Kumar Garg Engineering College Uttar Pradesh Ghaziabad India

Natural fibres derived from plants, animals, and minerals have been used by humans since the start of civilization. Since then, with the changing human needs, these naturally occurring fibres are finding new applications and uses. Due to their high specific strength, low density, and biocompatibility, these natural fibres have found use as filler materials in advanced composite materials in the 21st century. In an environment concerned and the energy-hungry world, another notable stride towards sustainable engineering is the use of additive manufacturing. Due to its low energy consumption, minimal material wastage, and easy fabricability of complicated parts, additive manufacturing has gained attention as the norm of the future. Hence, there has been increasing popularity to try and manufacture composite reinforced with natural fibres through the additive manufacturing route. In this paper, we have tried to summarize the recent developments in the field of additive manufacturing of Natural fibre reinforced composites. Comprehensive discussions regarding the different kinds of natural fibres, additive manufacturing routes, pre-processing of natural fibres and their biodegradability have been included. In the end, we have drawn some conclusions and have suggested future directions to the research. © 2022

关键词： 3D printers

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The Indoor People Tracking and Counting System

The Indoor People Tracking and Counting System

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2023 International Automatic Control Conference, CACS 2023

作者： Lin, Hao-Pu Han, Chin-Chuan Liao, Jun-Wei Ciou, Chong-Han Hong, Yi-Cheng Tan, Ming-Lun National United University Ph. D. Program in Material and Chemical Engineering MiaoLi Taiwan National United University Department of Computer Science and Information Engineering MiaoLi Taiwan

ISBN: (纸本)9798350306354

COVID-19 outbreaks and becomes serious from 2019 winter. Taking body temperature, wearing masks, recording footprint and avoiding crowds become important tasks and require a lot of manpower support for the prevention of the epidemic in every. In this study, we have integrated the infrared thermometer devices to measure people temperature and the people identities through RGB images at the entrance of buildings. Using the computer vision and deep learning methods, we would like to build a 24/7 and region-wide coverage assistance system to automatically record the footprint of a specific people in the building. We also detect if people taking off their masks in the yard at any time. The processing videos are grabbed from the existing CCTV systems. The developed system also locates the crowd and calculate the number of people in a specified area, and the manager can know the number of people and control the access in real time. It will reduce the burden of manpower. In addition, we have optimized the system performance to handle multiple camera videos and to reduce the hardware cost at the same time. © 2023 IEEE.

关键词： Access control

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Inbound Supply Chain Risk Management: A Case Study From an Automotive Manufacturing Firm

Inbound Supply Chain Risk Management: A Case Study From an A...

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2023 IEEE International Conference on Industrial engineering and engineering Management, IEEM 2023

作者： Imran, J.A. Ratnayake, R.M.C. Okdinawati, L. School of Business and Management Institut Teknologi Bandung Bandung Indonesia University of Stavanger Department of Mechanical and Structural Engineering and Material Science Stavanger Norway

ISBN: (纸本)9798350323153

Supply chain (SC) risks significantly impact manufacturers, affecting their operations, finances, and business activities. The lead time to arrive of raw material is a critical measure in the inbound SC. This study aims to develop a risk matrix to assess inbound SC risks, thereby enabling predictions of potential for failures and taking proactive measures. Using a case study in an automotive manufacturer and data from a logistics expert interview, the Mean Time to Arrival (MTTA) is identified as a measure for the probability of failure (PoF). The consequences of potential failure (CoFs) consider 'undesirable MTTA' and are classified into quantitative (e.g., production stoppages and man-hour losses) and qualitative (e.g., client loss and goodwill) aspects. The study developed a risk matrix to show the interrelationship among PoFs, CoFs, and the corresponding risk levels. It also identified recommended actions for various risk levels and presented an illustrative SC risk assessment. This paper provides practical guidelines for effective inbound SC risk management in manufacturing, aiding decision makers in informed decision-making and enhancing their operations. © 2023 IEEE.

关键词： automotive industry inbound supply chain risk matrix supply chain risk management

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Low-Temperature Diffusion Bonding Behavior of Hydrogenated Zr R60702

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Acta Metallurgica Sinica(English Letters) 2023年第10期36卷 1603-1618页

作者： Jialin Zheng Longteng Li Huiping Wu Doudou Yang Bin Wang Dayong An Xifeng Li Institute of Forming Technology and Equipment School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200030China Luoyang Ship Material Research Institute Luoyang471023China Beijing Xinghang Electro-Mechanical Equipment Co. Ltd.Beijing100074China

High temperature in diffusion bonding(DB)process severely deteriorates the performance of zirconium(Zr)R60702 in extreme chemical ***,it is important to reduce the DB temperature of Zr *** this work,low-temperature diffusion bonding of Zr R60702 at 750°C is realized by 0.3 wt%hydrogen addition while 900°C is required in DB process for unhydrogenated Zr *** shear strength of the hydrogenated joint bonded at 750°C reaches 388 MPa,which is 117.98%higher than that of the unhydrogenated joint bonded at 750°C and equal to that of the unhydrogenated joint bonded at 900°*** effects of hydrogen addition in Zr R60702 on the microstructure evolution,phase transformation temperature,interatomic bonding and self-diffusion coefficient of Zr atoms are investigated in *** results show that the optimized DB properties can be attributed to the improvements of its grain boundary diffusion,plasticity and self-diffusion coefficient of Zr atoms.

关键词： Low-temperature diffusion bonding Hydrogenation Zr R60702

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RIM Experiment on Fuel Adhesion Characteristics of Inclined-Wall-Impinging Spray under Cross-Flow Conditions 10

RIM Experiment on Fuel Adhesion Characteristics of Inclined-...

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10th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2022

作者： Zhang, Gengxin Shi, Penghua Luo, Hongliang Ogata, Yoichi Nishida, Keiya Department of Mechanical Systems Engineering Graduate School of Engineering University of Hiroshima Japan Mechanical Engineering Program Graduate School of Advanced Science and Engineering University of Hiroshima Japan

The impingement of fuel sprays on the piston surface significantly affects mixture formation, combustion performance, and pollutant emissions in Direct-Injection Spark-Ignition (DISI) engines. To better understand the fuel adhesion behavior, the fuel adhesion characteristics of fuel spray impinging on the flat wall under cross-flow condition were investigated in this work. Refractive Index Matching (RIM) were employed to observe the propagation of fuel adhesion. Then the area, mass, and thickness of fuel adhesion were evaluated under various cross-flow velocities. Also, the propagation mechanism and lifetime prediction of fuel adhesion under the cross-flow conditions were revealed. The experimental results can provide necessary guidance on the operating conditions of airflow inside the engine. © 2022 by the Japan Society of mechanical Engineers All rights reserved.

关键词： Adhesion

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Progress of Advanced Cathode materials of Rechargeable Aluminum-Ion Batteries

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Energy material Advances 2024年第1期5卷 405-431页

作者： Dongwei Ma Jiahui Li He Li Du Yuan Zhuoyu Ji Maykel Manawan Carlos Ponce de León Albarran Chuan Wu Jia Hong Pan State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004GuangxiPR China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206PR China College of Materials Science and Engineering Changsha University of Science and TechnologyChangsha 410004HunanPR China Research Center for Advanced Material National Research and Innovation Agency(BRIN)South Tangerang15314BantenIndonesia Faculty of Defense Science and Technology Republic of Indonesia Defense UniversityBogor 16810Indonesia Department of Mechanical Engineering Faculty of Engineering and Physical SciencesUniversity of SouthamptonHighfieldSouthampton SO171BJUK Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081PR China Yangtze Delta Region Academy of Beijing Institute of Technolog Jiaxing 314019PR China

Given the increasing attention to the safety issues of lithium-ion batteries(LIBs)and the continuous rise in the price of lithium and its compounds,it is urgent to explore innovative electrochemical energy device alternatives to *** efforts have been devoted to developing rechargeable aluminum-ion batteries(AIBs),owing to their low cost and high energy density derived from the 3-electron redox ***,the dendrite-free plating behavior with room-temperature ionic liquid electrolytes endows AIBs with great safety expectations.A marked hurdle persists in the quest for appropriate cathode materials that can effectively accommodate aluminum ion species in *** review aims to deliver an integrated overview of the state-of-the-art cathode materials for nonaqueous and aqueous AIBs,with a special emphasis on their underlying electrochemical interaction with *** strategies adopted to improve the specific capacity and cyclic performances of AIBs are ***,future perspectives of AIBs are discussed.

关键词： rechargeable aluminum ion batteries ionic liquid electrolytes cathode materials specific capacity electrochemical interaction cyclic performance room temperature ionic liquid electrolytes

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Substrate engineering for Tuning the Absorption Response of Microwave Absorber

Substrate Engineering for Tuning the Absorption Response of ...

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2023 IEEE Microwaves, Antennas, and Propagation Conference, MAPCON 2023

作者： Yadav, Jyoti Mishra, Abhishek Vishwakarma, Rahul Srivastava, Kumar Vaibhav Ramkumar, J. Indian Institute of Technology Material Science Programme Kanpur India Indian Institute of Technology Department of Electrical Engineering Kanpur India Indian Institute of Technology Department of Mechanical Engineering Kanpur India

ISBN: (纸本)9798350328264

In this manuscript, the idea of substrate engineering is proposed and studied. The study is performed over a resistive patch printed on top of various 3D printable substrates. Two 3D printable fibers are used for the purpose: one is polylactic acid (PLA) and the other is conductive acrylonitrile butadiene styrene (CABS). The substrate design and composition are optimized for lowering overall thickness improving bandwidth, and quality factor. At last, a unit cel design is proposed for X-band absorption. More than 90% absorption is achieved up to 45° for both TE and TN polarization. The unit cell has 4-fold symmetry and is mounted on top of a honeycomb substrate made up of a composition of PLA and CABS fiber having 50% mixing by volume. © 2023 IEEE.

关键词： Additive manufacturing honeycomb Microwave absorbers substrate engineering

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Accelerating matrix/boundary precipitations to explore high-strength and high-ductile Co_(34)Cr_(32)Ni_(27)Al_(3.5)Ti_(3.5) multicomponent alloys through hot extrusion and annealing

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Journal of materials science & Technology 2023年第12期143卷 62-83页

作者： Xiaoming Liu Zongde Kou Ruitao Qu Weidong Song Yijia Gu Changshan Zhou Qingwei Gao Jiyao Zhang Chongde Cao Kaikai Song Vladislav Zadorozhnyy Zequn Zhang Jürgen Eckert Shenzhen Research Institute of Shandong University Shenzhen 518057China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China School of Material Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China Department of Materials Science and Engineering Missouri University of Science and TechnologyRollaMO 65409USA Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China National University of Science and Technology«MISIS» Moscow 119049Russia Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben A-8700Austria Department of Materials Science Montanuniversität LeobenLeoben A-8700Austria

Annealing-regulated precipitation strengthening combined with cold-working is one of the most efficient strategies for resolving the conflict between strength and ductility in metals and ***,precipitation control and grain refinement are mutually contradictory due to the excellent phase stability of multicomponent *** work utilizes the high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co_(34)Cr_(32)Ni_(27)Al_(3.5)Ti_(3.5) multicomponent *** extrusion effectively reduces grain sizes and simultaneously accelerates the precipitation of coherent L12 nanoparticles inside the face-centered cubic(FCC)matrix and grain boundary precipitations(i.e.,submicron Cr-rich particles and L12-Ni 3(Ti,Al)precipitates),resulting in strongly reciprocal interaction between dislocation slip and hierarchical-scale *** annealing regulates grain sizes,dislocations,twins,and precipitates,further allowing to tailor mechanical *** high yield strength is attributed to the coupled precipitation strengthening effects from nanoscale coherent L12 particles inside grains and submicron grain boundary precipitates under the support of pre-existing *** excellent ductility results from the synergistic activation of dislocations,stacking faults,and twins during plastic *** present study provides a promising approach for regulat-ing microstructures,especially defects,and enhancing the mechanical properties of multicomponent alloys.

关键词： Multicomponent alloys Hot extrusion Microstructure mechanical properties Precipitation strengthening

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3D Printing of Thermally Curable Resin/Continuous Carbon Fiber Composites with Interpenetrating Polymer Interlayer 38

3D Printing of Thermally Curable Resin/Continuous Carbon Fib...

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38th Technical Conference of the American Society for Composites, ASC 2023

作者： Deng, Kaiyue Zhang, Chunyan Fu, Kun Park, S. Department of Mechanical Engineering University of Delaware NewarkDE19716 United States Department of Material Science and Engineering University of Delaware NewarkDE19716 United States Department of Mechanical Engineering Center for Composite Materials University of Delaware NewarkDE19716 United States

ISBN: (纸本)9781605956916

3D printing of continuous carbon fiber composites has been a popular research focus in recent years, since it enables the design freedom and the tuning of structural properties. Currently, the existing 3D printing methods of composites with thermoplastics and photocurable resins lack comparable mechanical performances to the thermally curable thermoset resins. But the thermally curable thermoset resin as a matrix is also limited in the long thermal curing time and the difficulty in maintaining structures without mold or high pressure. In this work, we proposed our own 3D printing strategy of the thermally curable thermoset resin based continuous carbon fiber composites, which is capable of producing rapidly and maintaining the geometrical stability. It is achieved by coating dual-cure resin on the surfaces of the fiber/resin laminates during 3D printing, and forming the interpenetrating polymer network (IPN) at interlayers between the laminates after post-thermal treatment. This strategy was demonstrated in our self-developed robotic-based 3D printer, which contains the functions of thermoset resin impregnation, dual-cure resin coating, and compaction. The current level of mechanical properties of the printed composites has achieved tensile strength of 1132.69 MPa, flexural strength of 1080.37 MPa, and interlaminar shear strength of 48.75 MPa. © 2023 by DEStech Publications, Inc. and American Society for Composites. All rights reserved.

关键词： Resins

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Comparison of Advanced Sample Preparation Techniques for High-Resolution Imaging of Sponge Spicule Cross-Sections

Comparison of Advanced Sample Preparation Techniques for Hig...

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Symposium on Natural Fibers and Biocomposites: A Sustainable Solution, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： Tavangarian, Fariborz Fani, Niloofar Monfared, Armaghan Hashemi Sadeghzade, Sorour Mechanical Engineering Program School of Science Engineering and Technology Pennsylvania State University Harrisburg MiddletownPA17057 United States Department of Biomedical Engineering Pennsylvania State University State College University ParkPA16802 United States School of Engineering Westlake University Hangzhou310024 China

ISBN: (纸本)9783031811890

This study comprehensively investigates the effectiveness of three advanced sample preparation techniques—ion milling, laser cuttingLaser-based techniques, and Focused Ion Beam (FIB) milling—for high-resolution imaging of Euplectella aspergillum sponge fibers called spicules. Primarily composed of silica layers with nanometer-scale organic interlayers, spicules possess complex hierarchical structures which are critical for their mechanical propertiesmechanical property. Accurate characterizationCharacterization of these structures requires advanced sample preparation to prevent artefacts and preserve structural integrity. Ion milling introduced significant surface degradation and uneven material removal in spicules. Despite its precision, laser cutting caused thermal damage and induced micro-cracks, compromising the microstructural integrity. In contrast, FIB milling provided superior results, producing smooth, artefact-free cross-sections with minimal thermal and mechanical stress. The real-time imaging capability of FIB milling further ensured optimal sample preparation, making it the most suitable technique for delicate biological materials like spicules. The findings of this study provide valuable insights into the preparation of biological samples for further research and analysis. © The Minerals, Metals & materials Society 2025.

关键词： Milling (machining)

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