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4th International Symposium on Advances and Innovation in mechanical engineering, ISAIME 2023

作者： Pertiwi, Indah Ayu Muhammad Abubakar Setiawan, Adi Iskandar, Rizky Magister Program in Renewable Energy Engineering Faculty of Engineering Universitas Malikusssaleh Jalan Batam Bukit Indah Lhokseumawe24352 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Malikussaleh Kampus Bukit Indah Muara Satu Lhokseumawe24352 Indonesia Mechanical Engineering Vocational Education Study Program Faculty of Teaching and Educational Science Universitas Malikussaleh Cot Teungku Nie Reuleut Muara Batu Aceh Utara24355 Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Malikusssaleh Jalan Batam Bukit Indah Lhokseumawe24352 Indonesia

Sawdust is one of the industrial wastes which naturally contains low energy density. An effective method is needed to utilize this biomass as a solid fuel product. This work aimed to investigate the physical and combustion properties of bio-pellets produced from sawdust under the wet torrefaction method. To prepare sawdust bio-pellet a number of steps were carried out including the wet torrefaction process, dough preparation, pelletizing, and drying. Wet torrefaction was performed by hydrothermally treating the sample in an autoclave at a temperature of 130°C and pressure of 2 atm (g) for 80 minutes. For the hydrothermal process, the used acetic acid solution was varied with variations of 1.3 M, 1.8 M, and 2.3 M. Properties of the product were analyzed under proximate and bomb calorimetry analyses. To evaluate the combustion properties a purposely built test apparatus was developed equipped with a data logger system. Based on the results it can be observed that increases in torrefaction temperature and acetic acid concentration resulted in an increase in the calorific value as well as decreases in the ash content. The highest calorific value was 4745 kcal/kg obtained from sawdust torrefied in acetic acid with a concentration of 2.3 M at a temperature of 130?. This sample also exhibits the lowest ash content which is only 1.97%. The combustion test disclosed a maximum combustion temperature of 589? with a burning rate of 0.711 g/min. Overall, the wet torrefaction applied in this investigation was beneficially enhanced the properties of bio-pellet products. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Sawdust

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Development of sample rotator for focused ion beam micro-nano machining system 8

Development of sample rotator for focused ion beam micro-nan...

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8th International Conference on Speckle Metrology, Speckle 2023

作者： Guo, Hailin Huang, Siling Zhao, Shiyan Zhang, Xu Xia, Chaoxiang Pei, Ning Wang, Dasen Inner Mongolia Metal Material Research Institute Inner Mongolia Baotou014030 China School of Mechanical Engineering Nanjing University of Science and Technology Jiangsu Nanjing210094 China

ISBN: (数字)9781510674592

ISBN: (纸本)9781510674585

o achieve the positioning and multi-degree-of-freedom machining of rotary micro-feature structures on the five- axis motion table in the focused ion beam micro-nano machining system, a high-precision sample rotator based on worm gear drive in vacuum environment is designed. The finite element method is used to simulate and optimize the key components. After loading, the maximum deformation of the component is less than 0.2μm, and the natural frequency is more than 10000Hz, which meet the requirements of the working accuracy and strength of the component. The focused ion beam machining experiment of high aspect ratio microstructure of metal material was carried out by using this sample rotator, and the surface roughness of metal material after machining was better than 5nm. The developed sample rotator expands the processing range of focused ion beam processing system. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Finite element method

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Ultra-sensitive magnetic nanomechanical array sensor based on graphene oxide for single bacterial cell detection

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Nano Research 2025年第4期18卷 411-424页

作者： Zihan Qiao Kainan Mei Yu Wang Tianhao Yan Shubo Zhang Qiubo Chen Ye Chen Chen Wang Tianxiang Ren Shangquan Wu Qingchuan Zhang CAS Key Laboratory of Mechanical Behavior and Design of Material Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China Department of Cell Biology and Genetics College of Basic Medical SciencesJilin UniversityChangchun 130021China School of Mechanical and Aerospace Engineering College of EngineeringNanyang Technological UniversitySingapore 639798Singapore Institute of Flexible Electronics Technology of THU Jiaxing 314000China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of ScienceBeijing 100190China Hefei National Research Center for Physical Sciences at the Microscale Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Pathogenic bacterial infections pose major health threats and economic *** and highly sensitive biochemical sensors are essential for bacterial detection in food safety and clinical ***,we introduce a graphene oxide(GO)-based magnetic nanomechanical array sensor that utilizes the large surface area of GO to bind more magnetic nanoparticles(MNPs)and *** and ultra-sensitive detection can be achieved even at extremely low target *** approach can directly detect a single Escherichia coli cell without time-consuming bacterial culture,and the linear detection range is 1-100 CFU·***,the sensor showed good specificity,reproducibility,stability,and stance to interference,and could detect 1 CFU·mL^(-1) Escherichia coli in ***,we realized the simultaneous detection of two bacteria at extremely low concentrations,which proved that the sensor had the potential for high-throughput *** addition,for extremely low-concentration samples(<100 CFU·mL^(-1)),we controlled the magnetic force at the tip of the microcantilever,greatly enhancing its deflection and *** method provides a novel and ultrasensitive method for the timely detection of pathogenic bacteria,and can also be applied to the highly sensitive detection of other targets such as DNA,small molecules,proteins,and viruses by using different *** research provides a promising tool for effective,rapid and highly sensitive detection in the field of public health and food safety.

关键词： bacterial detection microcantilever array graphene oxide magnetic force nanomechanical sensor

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Fuzzy Logic for Assessing the Health of a Corn Crop within Family Farming

Fuzzy Logic for Assessing the Health of a Corn Crop within F...

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2024 IEEE Latin American Conference on Computational Intelligence, LA-CCI 2024

作者： Mendonca, Vanessa Santos, Mikael Munoz, Daniel M. Humberto Llanos, Carlos Federal Institute of Brasilia Department of Computer Science Brazil Mechatronics Graduate Program Department of Mechanical Engineering Brazil Federal Institute of Brasilia Department of Agronomy Brazil University of Brasilia Faculty of Gama Electronics Engineering Undergraduate Program Brasilia Brazil

ISBN: (纸本)9798350374575

Technological advancements are increasingly evident across various sectors, including automobiles, industry, and healthcare. In precision agriculture, significant progress has been made, with AgroTICs and Smart Agriculture gaining substantial traction in the market. However, a gap remains between cutting-edge technology and family farming, presenting a challenge from both social and applied research perspectives. However, there is still a gap between cutting-edge technology and family farming, which creates a challenge from a social and applied research point of view. In this context, this paper proposes a monitoring model based on Fuzzy Logic and sensor automation applied to estimate the health of a corn crop. The proposed Fuzzy inference system involves calculating an indicator of nutrients as well as the average color and area of corn plants. The nutrient indicator is automatically computed by an ESP32 microcontroller using sensor readings, while the average color and area inputs are manually entered via a mobile application. Additionally, the Fuzzy inference is integrated into the ESP32. The model underwent experimental validation on the health of the plantation, and the results were evaluated in four areas: one was designated for testing, and three were for validation. The model achieved an accuracy of 97.5% in Scenario 3, categorized as 'Very Favorable', and an accuracy of 65% in Scenarios 2 and 4, categorized as 'Unfavorable'. The implications of this research contribute to the advancement of AgroTICs among small producers, with the potential to enhance and automate the monitoring of their harvest production. © 2024 IEEE.

关键词： Agribusiness

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Design and verification of a single roll rapid solidification injection nozzle for Mg-Al-Ca anode material for magnesium rechargeable batteries using by CAE

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Keikinzoku/Journal of Japan Institute of Light Metals 2024年第11期74卷 491-498页

作者： Kirimoto, Yuichi Tsukeda, Tadayoshi Aida, Tetsuo Nemoto, Yasunori Tabata, Hironobu Haga, Toshio Kurihara, Hideki Suzuki, Mayumi Department of Nano and Functional Material Science Graduate School of Science and Engineering for Education University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama Japan FLOW Science Japan Hamamatsu-shi Shizuoka Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawa-gun Toyama Japan Department of Mechanical Engineering Osaka Institute of Technology Osaka-shi Osaka Japan Saitama Industrial Technology Center Kawaguchi-shi Saitama Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

In the development of anode materials for magnesium rechargeable batteries, our research team has discovered the potential of the single roll rapid solidification method as a manufacturing method. The requirements for the fabrication of anode materials by the single roll rapid solidification method are thinness, length, width, and a ribbon with good surface properties. Therefore, in this study, the behavior of the molten metal inside the nozzle was confirmed using general-purpose thermal-fluid CAE software. The nozzle interior and nozzle aperture geometry are designed considering the results. The models considered in the CAE analysis are the slope angle of the nozzle interior, the length, area, and shape of the opening gate. The nozzle model with good results in the CAE analysis was fabricated, and ribbons were fabricated by the same method. The appearance of the produced ribbons was very good, and the luster peculiar to the metal was confirmed. It was found that ribbon thickness of less than 100 μm could be produced under the condition of 25 m/s peripheral speed. Investigation of hole defects on the surface confirmed that the defect rate decreases as the thickness of the ribbon increases. © 2024 The Japan Institute of Light Metals.

关键词： Rapid solidification

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Micromechanical origin of heat transfer to granular flow

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Physical Review E 2024年第4期109卷 L042902-L042902页

作者： Xintong Zhang Sarath Adapa Tianshi Feng Jian Zeng Ka Man Chung Clifford Ho Kevin Albrecht Renkun Chen Department of Mechanical and Aerospace Engineering University of California San Diego La Jolla California 92093 USA Program in Materials Science and Engineering University of California San Diego La Jolla California 92093 USA Concentrating Solar Technologies Department Sandia National Laboratories 1515 Eubank Boulevard SE Albuquerque New Mexico 87123 USA

Heat transfer across a granular flow is comprised of two resistances in series : near the wall and within the bulk particle bed, neither of which is well understood due to the lack of experimental probes to separate their respective contribution. Here, we use a frequency modulated photothermal technique to separately quantify the thermal resistances in the near-wall and the bulk bed regions of particles in flowing states. Compared to the stationary state, the flowing leads to a higher near-wall resistance and a lower thermal conductivity of bulk beds. Coupled with discrete element method simulation, we show that the near-wall resistance can be explained by particle diffusion in granular flows.

关键词： Fluidized beds Granular flows Granular materials Granular packing Interparticle interactions

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Important contributions of multidimensional nanoadditives on tribological applications of unitary and binary alloys

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Journal of Micromechanics and Molecular Physics 2023年第2-3期8卷 137-156页

作者： Yang, Kang Tang, Jun Lin, Haibo Xiong, Yahui Zhang, Feizhi Wu, Chao Chen, Hao Zhang, Hongliang Li, Zhenjie Li, Boliang Department of Mechanical Engineering Anyang Institute of Technology Avenue West of Yellow River Anyang 455000 China School of Mechanical Engineering Sichuan University of Science & Engineering 180# Xueyuan Street Huixing Road Zigong 643000 China Innovation Center for Chenguang High Performance Fluorine Material Sichuan University of Science and Engineering 180# Xueyuan Street Huixing Road Zigong 643000 China

Nanomaterials have attracted wide attention due to their great potential in the field of tribology, and have also been widely used in industrial production and manufacturing, aerospace, medical and life fields. Although numerous studies have been conducted on additive-reinforced nanocomposites, the important tribological understandings of nanoadditives associated with size effects ranging from 0D and 2D nanostructures with respect to multicomponent alloys remain comprehensively un-reviewed. Hence, the present situation of nanomaterials as functional additives in multicomponent alloys for friction reduction and wear resistant performances, with underlying friction and wear mechanisms, are summarized in this review. Finally, the development prospect and challenges of nanotribology are concluded, which further provide an in-depth understanding of such field for enriching practical applications. © 2023 World Scientific Publishing Co. Pte Ltd. All rights reserved.

关键词： friction multicomponent alloys Nanomaterials tribology wear mechanisms

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A state-of-the-art review on recent advances in the fabrication and characteristics of magnesium-based alloys in biomedical applications

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Journal of Magnesium and Alloys 2024年第7期12卷 2569-2594页

作者： Fatemeh Zahra Akbarzadeh Masoud Sarraf Erfan Rezvani Ghomi Vishnu Vijay Kumar Mojtaba Salehi Seeram Ramakrishna Sungchul Bae Department of Materials Engineering Babol Noshirvani University of TechnologyShariati Ave.Babol 47148-71167Iran Deputy Vice Chancellor’s Office(Research&Innovation) University of MalayaKuala Lumpur 50603Malaysia Center of Advanced Manufacturing and Material Processing Department of Mechanical EngineeringFaculty of Engineering University of MalayaKuala Lumpur 50603Malaysia Department of Mechanical Engineering Faculty of EngineeringUniversity of MalayaKuala Lumpur 50603Malaysia Center for Nanotechnology and Sustainability Department of Mechanical EngineeringNational University of SingaporeSingapore 117581Singapore Lee Kong Chian School of Medicine Nanyang Technological University SingaporeClinical Sciences Building11 Mandalay RoadSingapore 308232Singapore Structural Engineering Division of EngineeringNew York University Abu Dhabi(NYUAD)PO Box 129188 Abu DhabiUnited Arab Emirates International Institute of Aerospace Engineering&Management JAIN(Deemed-to-be-university)JGI global campusBangalore562112India Additive Manufacturing Division Singapore Institute of Manufacturing Technology(SIMTech)Agency for ScienceTechnology and Research(A∗STAR)5 Cleantech Loop 636732Singapore Department of Architectural Engineering Hanyang UniversitySeoulSouth Korea

Magnesium(Mg)and its alloys have recently gained increasing attention in the biomedical field as promising biodegradable materials with harmless degradation ***-based alloys have a wide range of biomedical applications because of their outstanding biocompatibility and unique mechanical *** use of Mg-based biomedical devices eliminates the need for post-healing biomaterial removal surgery and minimizes the negative consequences of the implantation of permanent biomaterials,including stress shielding and undesired metal ion release in the *** paper provides a literature review on the properties and manufacturing methods of Mgbased alloys for biomedical applications,including orthopedic implants,cardiovascular applications,surgical wires and staplers,and antitumor *** application of Mg-based biomaterials is investigated from a biological perspective,including matching functional properties,biocompatibility,host tissue responses,and anti-microbial strategies,along with potential additive manufacturing technologies for these ***,an outlook is presented to provide recommendations for Mg-based biomaterials in the future.

关键词： Mg-based alloys Biocompatibility Anti-microbial strategies Additive manufacturing Mg implants

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Effect of texture on deformation behavior of heterogeneous Mg-13Gd alloy with strength-ductility synergy

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Journal of materials science & Technology 2022年第18期113卷 271-286页

作者： Shuaishuai Liu Han Liu Xiang Chen Guangsheng Huang Qin Zou Aitao Tang Bin Jiang Yuntian Zhu Fusheng Pan State Key Laboratory of Mechanical Transmission College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing400044China Department of Materials Science and Engineering City University of Hong KongHong Kong999077China Nano and Heterogeneous Material Center Nanjing University of Science and TechnologyNanjing210094China

Heterostructure metals as a new class of materials can effectively break the traditional strength–ductility trade-off dilemma. In this study, the extruded sheet with the small extrusion ratio(ER) of 3.9(ER3.9)presented a heterogeneous lamella structure(HLS) and texture, where the fine dynamical recrystallized(DRXed) grains formed a random texture and coarse un-DRXed grains exhibited a strong basal *** ER3.9 sample presented an excellent combination of strength and ductility. The texture strengthening in coarse grains and hetero-deformation induced(HDI) strengthening contributed to the enhanced strength of the ER3.9 sample besides grain refinement. The improving ductility mainly stems from the weakened texture in fine grains. Interestingly, in coarse grains, the strong basal texture, the occurrence of cross slip, low stacking fault energy(SFE), and dislocation pinned by precipitates weaken the HDI hardening effect. While the traditional dislocation hardening mainly generated by fine grains dominates overall strain hardening. Meanwhile, the activation of non-basal slips, especially pyramidal slip,and the generation of cross slips in fine grains benefit for coordinating plastic deformation. The ability for coordinate plastic deformation in fine grains is higher than that of coarse grains, which was confirmed by the digital image correlation technology. This work will promote the development of the heterogeneous theory in textured Mg alloys.

关键词： Mg-Gd alloy Recrystallization Heterogeneous texture mechanical properties HDI hardening

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Unexpected creep behavior in a rejuvenated metallic glass

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Journal of materials science & Technology 2023年第32期163卷 140-149页

作者： J.P.Wu Y.Lin F.H.Duan Q.Chen H.T.Wang N.Li J.L.Wen J.Pan L.Liu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Material Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Laboratory of Nanomaterials&Nanomechanics Department of Mechanical EngineeringCity University of Hong KongHong KongChina Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China Shenzhen Polytechnic Shenzhen 518055China

Rejuvenation,bringing metallic glasses(MGs)to the younger and higher energy states,provides an alternative avenue to explore the interplay between the property and microstructures of *** this study,the creep behavior of the Zr_(69.5)Cu_(12)Ni_(11)Al_(7.5)MGs was experimentally examined by controlling the energy state in terms of structural rejuvenation and thermal *** is found that compared to the as-cast counterpart,the annealed MG at a lower energy state exhibits a higher hardness,a smaller displacement,and a lower creep rate due to the decreased free volume and the inhibited activation of the shear transformation ***,the rejuvenated MG at a high energy state displays lower hardness and increased free volume content,yet it demonstrates superior creep resistance compared to its as-cast counterpart,which deviates from conventional *** unexpected phenomenon occurs as the initial high-content free volume annihilates during creep,and strain hardening takes precedence over strain softening as the prevailing process during creep deformation,leading to a superior creep performance in extremely rejuvenated MGs.

关键词： Metallic glass Energy state Rejuvenation Creep Strain-hardening

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