检索结果-内蒙古大学图书馆

Communications - Scientific Letters of the University of Žilina 2010年第2期12卷 67-71页

作者： Takeichi, Yoshinori Dzimko, Marian Winkelmann, Uwe Department of Mechanical Engineering Toyohashi University of Technology Toyohashi Aichi Japan Faculty of Mechanical Engineering Department of Design and Machine Elements University of Zilina Slovakia University of Applied Sciences Magdeburg-Stendal Magdeburg Germany

The effect of molybdenum trioxide MoO3 powder on the tribological properties of sliding pair exposed to the temperature up to 700 °C was examined. The experiment showed that MoO3 powder placed directly on the sliding surface of main tribological body influenced and reduced friction values of tested materials. Especially in a temperature range from 500 to 700 °C a clear minimum of friction coefficient around 600 °C was observed. The X-ray diffraction analysis of friction and wear tracks that appeared on specimens showed mixture of different elements which are the product generated during tribological processes at high temperature.

关键词： Bronze

来源：评论

学校读者我要写书评

暂无评论

Composite armor philosophy(CAP):Holistic design methodology of multi-layered composite protection systems for armored vehicles

引用

Defence Technology（防务技术） 2024年第11期41卷 181-197页

作者： Evangelos Ch.Tsirogiannis Foivos Psarommatis Alexandros Prospathopoulos Georgios Savaidis EODH SA Research and Development Department63080LakkomaChalkidikisGreece SIRIUS Department of InformaticsUniversity of OsloGaustadalleen 23B0373OsloNorway Physical Metallurgy Laboratory(PML) Mechanical Engineering DepartmentAristotle University of Thessaloniki54124ThessalonikiGreece Centre for Research&Development of Advanced Materials(CERDAM) Center for Interdisciplinary Research and InnovationBalkan CenterBuilding B’10th km Thessaloniki-Thermi Road57001ThessalonikiGreece Laboratory of Machine Elements&Machine Design School of Mechanical EngineeringAristotle University of Thessaloniki54124ThessalonikiGreece Digital Representation and Additive Manufacturing(DRAM) Center for Interdisciplinary Research and InnovationBalkan CenterBuilding B’10th kmThessaloniki-Thermi Road57001ThessalonikiGreece

A philosophy for the design of novel,lightweight,multi-layered armor,referred to as Composite Armor Philosophy(CAP),which can adapt to the passive protection of light-,medium-,and heavy-armored vehicles,is presented in this *** can serve as a guiding principle to assist designers in comprehending the distinct roles fulfilled by each *** CAP proposal comprises four functional layers,organized in a suggested hierarchy of *** notable is the inclusion of a ceramic-composite principle,representing an advanced and innovative solution in the field of armor *** paper showcases real-world defense industry applications,offering case studies that demonstrate the effectiveness of this advanced *** represents a significant milestone in the history of passive protection,marking an evolutionary leap in the *** philosophical approach provides designers with a powerful toolset with which to enhance the protection capabilities of military vehicles,making them more resilient and better equipped to meet the challenges of modern warfare.

关键词： Passive armor protection Composite armor Ballistic performance Protection systems Vehicle protection Armor design

来源：评论

学校读者我要写书评

暂无评论

Determination of the Characteristics of Gears of Robot-Like Systems by Analytical Description of their Structure

Determination of the Characteristics of Gears of Robot-Like ...

引用

IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)

作者： Stefan Landler Raúl Molina Blanco Michael Otto Birgit Vogel-Heuser Markus Zimmermann Karsten Stahl Technical University of Munich Germany TUM School of Engineering and Design Department of Mechanical Engineering Munich Institute of Robotics and Machine Intelligence (MIRMI) Institute of Machine Elements Gear Research Center (FZG) Institute of Automation and Information Systems (AIS) Laboratory for Product Development and Lightweight Design (LPL)

The axes of robots and robot-like systems (RLS) usually include e-motor-gearbox-arrangements for optimal connection of the elements. The characteristics of the drive system and thus also of the robot depend strongly on the gears. Different gearbox designs are available which differ in stiffness, efficiency and further properties. For an application-optimal design of RLS a uniform documentation and a comparability of gearbox concepts is a decisive factor. The application-optimal design is supported by an interdisciplinary approach between mechanical engineering and software design, guided by adequate product development methodology. The quite heterogeneous characterization of gearboxes for RLS which is currently the state of the art is a relevant obstacle in the flexible and optimal design of RLS. The paper shows the analysis of the gear structure with unified symbols for specific machine elements and contact types. The introduced method gives insight into the mechanical structure of the gearboxes. Similarities between gear types can thus be revealed. This also enables the classification of new developments in the state of the art. Moreover, the developed method for analyzing the gear structure can be used to determine the characteristics of gears. Examples for these characteristics are backlash, efficiency or stiffness. Specifically, the stiffness of gears can be synthesized by the force action of individual contacts and the individual phenomena that occur with them. The representation by individual phenomena also makes it possible to extend the calculation to include influencing parameters such as temperature that have not been sufficiently taken into account so far.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Micro/nano-structured TiO2 surface with dual-functional antibacterial effects for biomedical applications

引用

Bioactive Materials 2019年第1期4卷 346-357页

作者： Xiang Ge Chengzu Ren Yonghui Ding Guang Chen Xiong Lu Kefeng Wang Fuzeng Ren Meng Yang Zhuochen Wang Junlan Li Xinxin An Bao Qian Yang Leng Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineeringTianjin UniversityTianjin300354China Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Center for Advanced Regenerative Engineering Northwestern UniversityEvanstonIL60208USA Department of Biomedical Engineering Northwestern UniversityEvanstonIL 60208USA Key Lab of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China National Engineering Research Center for Biomaterials Sichuan UniversityChengdu610064China epartment of Materials Science and Engineering Southern University of Science and TechnologyShenzhenGuangdong518055China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin UniversityTianjin300072China School of Humanities Tianjin Agricultural UniversityTianjin300384China Department of Machine Elements and Engineering Design University of KasselKassel34125Germany

Implant-associated infections are generally difficult to cure owing to the bacterial antibiotic resistance which is attributed to the widespread usage of *** the global threat and increasing influence of antibiotic resistance,there is an urgent demand to explore novel antibacterial strategies other than using ***,using a certain surface topography to provide a more persistent antibacterial solution attracts more and more ***,the clinical application of biomimetic nano-pillar array is not satisfactory,mainly because its antibacterial ability against Gram-positive strain is not good ***,the pillar array should be equipped with other antibacterial agents to fulfill the bacteriostatic and bactericidal requirements of clinical ***,we designed a novel model substrate which was a combination of periodic micro/nano-pillar array and TiO2 for basically understanding the topographical bacteriostatic effects of periodic micro/nano-pillar array and the photocatalytic bactericidal activity of *** innovation may potentially exert the synergistic effects by integrating the persistent topographical antibacterial activity and the non-invasive X-ray induced photocatalytic antibacterial property of TiO2 to combat against antibiotic-resistant implant-associated ***,to separately verify the topographical antibacterial activity of TiO2 periodic micro/nano-pillar array,we systematically investigated its effects on bacterial adhesion,growth,proliferation,and viability in the dark without involving the photocatalysis of *** pillar array with sub-micron motif size can significantly inhibit the adhesion,growth,and proliferation of Staphylococcus aureus(***)and Escherichia coli(***).Such antibacterial ability is mainly attributed to a spatial confinement size-effect and limited contact area availability generated by the special topography of pillar ***,the pillar array is not lethal to S

关键词： Titanium dioxide Micro/nano-structured surface Topographical bacteriostatic activity Photocatalytic bactericidal property Non-invasive treatment

来源：评论

学校读者我要写书评

暂无评论

Preparation of Hybrid Tapes for Fabrication of Composites

Preparation of Hybrid Tapes for Fabrication of Composites

引用

作者： Mohanapriya Venkataraman Ji?í Militky Vijay Baheti Rajesh Mishra Roman Pulí?ek Jana Novotná Al?beta Samková Karolína Voleská Pavel Srb Technical University of Liberec Faculty of Textile Engineering Department of Material Engineering Technical University of Liberec Department of the Preparation and Analysis of Nanostructures Institute for Nanomaterials Advanced Technology and Innovations Technical University of Liberec Faculty of Mechanical Engineering Department of the Design of Machine Elements and Mechanisms

Technical fabrics, especially glass tows, are increasingly used for reinforcement of composites, due to its good mechanical properties. In this paper, glass fiber-based tapes containing special types of resins(in pre-condensate form) were prepared. This could be used for the preparation of composites using precise winding technique. The tensile properties of the tapes made from glass were investigated. Measurements were focused on the breaking force, deformation at break and initial modulus. It was also found that the durability of the tapes was sufficient for long term storing. The major benefit was the avoidance of resin penetration in the winded structure. This was achieved by the tight arrangements of fibrous phase which is very complicated. Also, the resins were loaded by suitable types of nanoparticles to enhance mechanical properties. The results showed a significant difference between the samples.

关键词： Hybrid Tapes Tnsile Properties Precise Winding Composites Epoxy Resin

来源：评论

学校读者我要写书评

暂无评论

ON METHODOLOGY FOR A DIGITAL TWIN OF SHIP PROPULSION UNDER HARSH ENVIRONMENTAL CONDITIONS 43

ON METHODOLOGY FOR A DIGITAL TWIN OF SHIP PROPULSION UNDER H...

引用

ASME 2024 43rd International Conference on Ocean, Offshore and Arctic engineering, OMAE 2024

作者： Purcell, Etienne Nejad, Amir R. Böhm, Angelo Sapp, Lina Lund, Jorrid von Bock und Polach, Franz Nickerson, Brendon M. Bekker, Anriëtte Gilges, Markus Saleh, Ahmed Lehmann, Benjamin Jacobs, Georg Valavi, Mostafa Kranz, Tobias Department of Marine Technology Norwegian University of Science & Technology TrondheimNO-7491 Norway Institute for Ship Structural Design and Analysis Hamburg University of Technology Hamburg21073 Germany Department of Mechanical & Mechatronic Engineering Stellenbosch University Stellenbosch7600 South Africa Institute for Machine Elements and Systems Engineering RWTH Aachen University Aachen52062 Germany EDR & MEDESO AS Lysaker1327 Norway Otto Piening GmbH Am Altendeich 83 Glückstadt25348 Germany

ISBN: (纸本)9780791887844

The propulsion system of a ship is a critical element for its safety and integrity. Therefore, it must be maintained properly to ensure that a vessel is able to fulfill its primary purpose. The need for maintenance is even more pronounced in ships where extreme environmental conditions, such as ice-covered waters, are expected. This is due to an increase in the magnitude and uncertainty of loads and therewith the increase in possible damages if the propulsion system fails. The use of digital twins is becoming increasingly popular in shipping and can also be used for intelligent maintenance and operation prediction of the propulsion system. This paper proposes the methodology of creating such a digital twin with a specific focus on the required measurement infrastructure, modeling of components, loads, and damage as well as how all of these aspects are combined. The digital twin was created using a polar supply and research vessel, S.A. Agulhas II. Bearings are discussed from the view of high-fidelity simulations and wear modeling. The propeller is modeled as a point mass with the propeller laws for predicting the hydrodynamic torque and thrust. Shaft dynamics are modeled using either a lumped-mass torsional model, a modal model, or a finite element model. Damage of the shaft and the propeller is based on SN-curve fatigue calculations. The motor torque is modeled using an equivalent circuit model while motor damage is modeled by estimating the hottest temperature within the motor windings. Ice-breaking simulations are used as inputs to propeller-ice interaction models to obtain insight into the loads caused by these interactions. The material properties of ice used during simulations are validated using experiments. The need for further validation for low-fidelity models and the need for reduced order modeling or surrogate models for high-fidelity models are discussed. Finally, the implementation of this digital twin is discussed based on the developed model and the

关键词： Ship propulsion

来源：评论

学校读者我要写书评

暂无评论

Condition monitoring of ship propulsion systems: State-of-the-art, development trend and role of digital twin 40

Condition monitoring of ship propulsion systems: State-of-th...

引用

2021 40th International Conference on Ocean, Offshore and Arctic engineering, OMAE 2021

作者： Nejad, Amir R. Purcell, Etienne Valavi, Mostafa Hudak, Roman Lehmann, Benjamin Guzmán, Francisco Gutiérrez Behrendt, Felix Böhm, Angelo Mario von Bock und Polach, Franz Nickerson, Brendon M. Bekker, Anriëtte Drazyk, Withold Department of Marine Technology Norwegian University of Science and Technology NO-7491 Trondheim Norway EDR and MEDESO AS Lysaker1327 Norway Institute for Machine Elements and Systems Engineering RWTH Aachen University Schinkelstrasse 10 Aachen52062 Germany Institute for Ship Structural Design and Analysis Hamburg University of Technology Hamburg21073 Germany Department of Mechanical and Mechatronic Engineering Stellenbosch University Sellenbosch7600 South Africa Otto Piening GmbH Am Altendeich 83 Glückstadt25348 Germany

ISBN: (纸本)9780791885178

This paper describes the current implementations and development trends of condition monitoring as it pertains to ship propulsion systems. In terms of total incidents in the shipping industry in the last five years, failures relating to the propulsion system represent the majority. Condition monitoring offers effective early detection of failure which translates to increased reliability and decreased maintenance costs. Current industrial practices are often limited to performance monitoring rather than condition monitoring. Special focus is afforded to how condition monitoring is implemented on board ships, which regulatory codes are relevant and the summary of state-of-the-art research in marine machinery. Moreover, operation and monitoring in extreme environmental conditions, such as the Arctic and Antarctic with ice impact on the propulsion has been discussed. The new developments, in particular, digital twin approaches in health and condition monitoring have been highlighted, considering its pros and cons and potential challenges. © 2021 by ASME

关键词： Condition monitoring

来源：评论

学校读者我要写书评

暂无评论

Additive Manufacturing of Ceramics opens the door to Components for Biomanufacturing Applications with high Functionality

引用

Procedia CIRP 2024年 125卷 284-289页

作者： Uwe Scheithauer Stefan Holtzhausen Hajo Wiemer Fraunhofer Institute for Ceramic Technologies and Systems Group Additive and Hybrid Manufacturing Winterbergstr. 28 01277 Dresden Germany TUD Dresden University of Technology Institute of Machine Elements and Machine Design Chair of Virtual Product Development Group Advanced Geometric Modeling And Analysis 01062 Dresden Germany TUD Dresden University of Technology Institute of Mechatronic Engineering Chair of Machine Tools Development and Adaptive Controls Department of Machine Data Processing 01062 Dresden Germany

Significant advancements in production technology, materials, component design, and data science foster innovation across industries, including biomanufacturing. Ceramic materials, adapted additive manufacturing processes, and novel construction methods hold immense innovation potential due to ceramics’ exceptional thermal, chemical, and mechanical properties. Additive manufacturing enables the creation of intricate ceramic components with unprecedented functionality. Hybridizing manufacturing technologies and materials facilitates direct integration of additional features like sensors and actuators. Despite their potential, ceramic materials remain underutilized. This article aims to spark a discourse on leveraging high-performance ceramic components in biomanufacturing, leveraging superior material properties, innovative design methods, additive manufacturing, process data analysis, and AI.

关键词： ceramics: additive manufacturing component design data science biomanufacturing

来源：评论

学校读者我要写书评

暂无评论

Micro product and process fingerprints for zero-defect net-shape micromanufacturing 19

Micro product and process fingerprints for zero-defect net-s...

引用

19th International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2019

作者： Tosello, Guido Gulcur, Mert Whiteside, Ben Coates, Phil Luca, Antonio De Sousa Lia Fook, Pablo Vinícius Riemer, Oltmann Danilov, Igor Zanjani, Matin Yahyavi Hackert-Oschätzchen, Matthias Schubert, Andreas Baruffi, Federico Achour, Soufian Ben Calaon, Matteo Nielsen, Chris Valentin Bissacco, Giuliano Cannella, Emanuele Rasmussen, Anette Bellotti, Mattia Saxena, Krishna Qian, Jun Reynaerts, Dominiek Santoso, Teguh Syam, Wahyudin Leach, Richard Kose, Sandeep Kuria Parenti, Paolo Annoni, Massimiliano Cai, Yukui Luo, Xichun Qin, Yi Zeidler, Henning Department of Mechanical Engineering Technical University of Denmark Kgs. Lyngby Denmark RKT Centre for Polymer MNT Faculty of Engineering and Informatics University of Bradford Bradford United Kingdom Laboratory for Precision Machining Leibniz Institute for Materials Engineering IWT University of Bremen Bremen Germany Chemnitz University of Technology Professorship Micromanufacturing Technology Chemnitz Germany IPU Kgs. Lyngby Denmark Department of Mechanical Engineering KU Leuven Member Flanders Make Leuven Belgium Manufacturing Metrology Team University of Nottingham Nottingham United Kingdom Mechanical Engineering Department Politecnico di Milano Milano Italy Centre for Precision Manufacturing Design Manufacture and Engineering Management University of Strathclyde Glasgow United Kingdom Institute of Machine Elements Design and Manufacturing Professorship for Additive Manufacturing TU Bergakademie Freiberg Freiberg Germany Beckmann-Institut für Technologieentwicklung Chemnitz Germany

ISBN: (纸本)9780995775145

Highly miniaturized systems find applications in key technological fields such as health-care, mobility, communications and optics. Required innovations for precision manufacturing of micro components can be achieved through post-process and in-process measurement of process input and output parameters. Hence, it is of critical importance to reduce the measurement and optimization effort, since process and product quality control can take a significant part of the production time in micro manufacturing. To solve this challenge, research is undertaken in order to define, investigate, implement and validate the "Product/Process Micro Manufacturing Fingerprint" concept. In particular, in the Horizon2020 Innovative Training Network "Process Fingerprint for Zero-defect Net-shape MICROMANufacturing", 9 beneficiaries and 14 industrial partners are collaborating to establish this concept for several manufacturing technologies, such as micro injection and micro ultrasonic moulding, micro mechanical and micro plasma polishing, micro electrical discharge machining, micro electrochecmical machining, micro grinding, micro laser machining, micro extrusion, micro metrology, micro sintering. The project has reached its goals of developing novel methods in micro scale manufacturing process monitoring and control, as well as micro and sub-micro product quality assurance. The overall result has been the establishment of effective micro product and process fingerprints for the considered manufacturing technologies. © 2019 European Society for Precision engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. All rights reserved.

关键词： Quality assurance

来源：评论

学校读者我要写书评

暂无评论

Assessment of the energy balance on test bench with open power flow and closed power flow for testing of planetary gears

引用

IOP Conference Series: Materials Science and engineering 2018年第1期393卷

作者： M Herda L Kučera T Gajdošík M Benko University of Žilina Faculty of Mechanical Engineering Department of Design and Machine Elements Univerzitná 1 010 26 Žilina Slovakia

The article deals with the design of the deployment of components and the creation of kinematic bonds of the test bench for planetary gearbox. The source of the drive on test benches is an electric motor. In article is described creation of kinematic bonds for test bench with an open flow of mechanical power, the part of which is in addition to the electric motor also a dynamometer. It is also described a assembly procedure of kinematic bonds for test bench with an closed flow of mechanical power, in which only an electric motor is used, while this electric motor is the same for both test benches. The kinematics of test benches is modelled and calculated in programs KissSys and KissSoft. As a result, the article deals with comparing the energy balance of the individual test benches, especially by comparing the energy balance of the electric motor.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：