检索结果-内蒙古大学图书馆

Self-Powered,Long-Durable,and Highly Selective Oil-Solid Triboelectric Nanogenerator for Energy Harvesting and Intelligent Monitoring

引用

Nano-Micro Letters 2022年第10期14卷 95-107页

作者： Jun Zhao Di Wang Fan Zhang Jinshan Pan Per Claesson Roland Larsson Yijun Shi Division of Machine Elements Department of Engineering Sciences and MathematicsLuleåUniversity of Technology97187 LuleåSweden Department of Engineering and Design School of Engineering and InformaticsUniversity of SussexBrighton BN19RHUK Division of Surface and Corrosion Science Department of ChemistryKTH Royal Institute of Technology10044 StockholmSweden

Triboelectric nanogenerators(TENGs)have potential to achieve energy harvesting and condition monitoring of oils,the“lifeblood”of ***,oil absorption on the solid surfaces is a great challenge for oil-solid TENG(O-TENG).Here,oleophobic/superamphiphobic O-TENGs are achieved via engineering of solid surface wetting *** designed O-TENG can generate an excellent electricity(with a charge density of 9.1μC m^(−2) and a power density of 1.23 mW m^(−2)),which is an order of magnitude higher than other O-TENGs made from polytetrafluoroethylene and *** also has a significant durability(30,000 cycles)and can power a digital thermometer for self-powered sensor ***,a superhigh-sensitivity O-TENG monitoring system is successfully developed for real-time detecting particle/water contaminants in *** O-TENG can detect particle contaminants at least down to 0.01 wt%and water contaminants down to 100 ppm,which are much better than previous online monitoring methods(particle>0.1 wt%;water>1000 ppm).More interesting,the developed O-TENG can also distinguish water from other contaminants,which means the developed O-TENG has a highly water-selective *** work provides an ideal strategy for enhancing the output and durability of TENGs for oil-solid contact and opens new intelligent pathways for oil-solid energy harvesting and oil condition monitoring.

关键词： Oil Triboelectric nanogenerator Energy harvesting Intelligent monitoring

来源：评论

学校读者我要写书评

暂无评论

Resume of 12 years interdisciplinary empirical studies of engineering design in Germany

引用

design Studies 1999年第5期20卷 481-494页

作者： Pahl, Gerhard Badke-Schaub, Petra Frankenberger, Eckart Darmstadt University of Technology Department Machine Elements and Engineering Design Magdalenenstraße 4 D-64289 Darmstadt Germany University Bamberg Department of Psychology II Markusplatz 3 D-96045 Bamberg Germany

In this resume we summarize the most important empirical results we achieved during the 12 years interdisciplinary research of psychologists and engineers. In the first part, general strategies during the design process and their impact on the result are presented. The second part discusses personal characteristics as prerequisites of individual designers influencing the process and the result, e.g. methodological training, heuristic competence or experience. The group and its various influences are discussed in part three. Unsolved questions and some issues as a scope for further research complete this paper.

关键词： design methodology psychology of design research methods design behaviour design theory

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 10

Assessment of the energy balance on test bench with open pow...

引用

10th International Conference machine and Industrial design in Mechanical engineering, KOD 2018

作者： Herda, M. Kučera, L. Gajdošík, T. Benko, M. University of Žilina Faculty of Mechanical Engineering Department of Design and Machine Elements Univerzitná 1 Žilina010 26 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. © 2018 Institute of Physics Publishing. All rights reserved.

关键词： Kinematics

来源：评论

学校读者我要写书评

暂无评论

Modularization of design knowledge as a basis for a high quality competence pool in product development

Modularization of design knowledge as a basis for a high qua...

引用

作者： Berger, Benjamin Birkhofer, Herbert Department of Machine Elements and Engineering Design Darmstadt University of Technology Magdalenenstr. 4 64289 Darmstadt Germany

ISBN: (纸本)0791836215

Contents of product development knowledge have to be available in a broad range and rank high in quality for teaching, learning and application. Individuality in presenting and high flexibility in use and arrangement are requested. Furthermore, the collaboration of different authors with different background is aimed to create a common competence pool in the range of product development. Therefore an approach to modularization, filing and accessing of various contents of product development knowledge will be applied. Contents of product development knowledge are modularized based on three levels - elements, modules and containers - and they are linked and integrated into the competence pool. Considering the requirements of different users, individual and specific documents can be created out of the modularized contents, e.g., material for a specific lecture. Appropriate modularization is considered as a basis for higher quality and improvement of communication and collaboration. Copyright © 2002 by ASME.

关键词： Product development

来源：评论

学校读者我要写书评

暂无评论

Reverse engineering for incorporation stage of forming dies

Reverse engineering for incorporation stage of forming dies

引用

20th CIRP design Conference, CIRP design 2010

作者： Schoene, C. Suesse, D. Stelzer, R. Schmidt, U. Department of Mechanical Engineering Institute of Machine Elements and Machine Design University of Technology Dresden Dresden Germany Department of Mechanical Engineering Institute of Solid State Mechanics University of Technology Dresden Dresden Germany

ISBN: (纸本)9783642159725

The paper elucidates how to connect forming process simulation with innovative measurement- and analysis equipment thereby taking into account the machine influences. Reverse engineering use 3D-Scanning data of sheet metal forming dies. Following this paradigm, the models that simulation relies on are refined, and spotting of forming dies is subjected to a scientific analysis. That means, that with Reverse engineering "extended process engineering" is verified at the real spotting procedure, the comparison of simulation- and measuring results is used to evaluate how close the investigated models are to reality, extending the optimisation algorithms used for springback compensation to die spotting, the modification of the die topology will be carried out automatically thanks to new software functions. © Springer-Verlag Berlin Heidelberg 2011.

关键词： Dies

来源：评论

学校读者我要写书评

暂无评论

Modern Methods of Construction design 1

引用

丛书名： Lecture Notes in Mechanical engineering

1000年

作者： Ladislav Ševĉik Petr Lepšík Michal Petrů Ivan Mašín Rudolf Martonka

来源：评论

学校读者我要写书评

暂无评论

Heat treatment of cold formed springs made from oil hardened and tempered spring steel wire 25th

Heat treatment of cold formed springs made from oil hardened...

引用

25th conference on New Developments in Wire Production and Processing, MEFORM 2017

作者： Geinitz, Veronika Kletzin, Ulf Technical University Ilmenau Department of Mechanical Engineering Institute for Design and Precision Engineering Machine Elements Group PO Box 100565 Ilmenau98684 Germany

ISBN: (纸本)9783035711332

The heat treatment after cold forming is used to decrease the residual stresses of springs, but the mechanical characteristics of the spring steel wires alters, too. This presentation describes the influence of the heat treatment technology (oven equipment, temperature, duration,…) to the properties and quality of helical compression springs made from oil hardened and tempered spring steel wire. © 2017 Trans Tech Publications, Switzerland.

关键词： Hardening

来源：评论

学校读者我要写书评

暂无评论

The effect of printing temperature and moisture on tensile properties of 3D printed glass fiber reinforced nylon 6 4

The effect of printing temperature and moisture on tensile p...

引用

4th International Conference on Processing and Characterization of Materials, ICPCM 2022

作者： Hadi, Ahmed Kadauw, Abdulkader Zeidler, Henning Mechanical and Mechatronic Department College of Engineering Salahaddin University-Erbil Kurdistan Region Iraq Department of Machine Elements Engineering Design and Manufacturing TechnischeUniversität Bergakademie Freiberg Germany

The Fused Filament Fabrication (FFF) process of polymer-based composites has advanced due to its ability to create intricate forms and geometries while maintaining excellent mechanical qualities. Nylon 6 reinforced by 20% glass fiber filament (PA6GF) has more mechanical strength and wear resistance than standard nylon. However, FFF-based 3D printed composites can suffer from poor bead-to-bead bonding and high void content, reducing their mechanical strength. Therefore, this study aims to investigate how the temperature development and mechanical characteristics of FFF-made PA6 reinforced with chopped glass fibers change depending on crucial process parameters. The study used the D638 ASTM tensile test specimen to determine the ultimate strength of the materials. The researchers conducted experiments using different process parameters such as liquefier temperature, print speed, and bed temperature, while varying moisture content and heat treatment profiles. They compared the mechanical characteristics of neat PA6 and PA6GF and investigated the role of these factors in bonding formation during the FFF process and the following mechanical characteristics of the printed pieces. The results showed that the correct heat treatment profiles significantly improved the strength and modulus of 3D-printed composites. The lower the moisture, the higher the tensile strength, by 17% due to diminished voids in the sample. For a given moisture content, the higher the temperature, the better the tensile strength, by 3%. The fiber reinforcements of the samples gave comparatively higher tensile strength, by 45%, which was an intuitive outcome. This study demonstrates that controlling the process parameters of the FFF process, such as liquefier temperature, print speed, and bed temperature, can significantly affect the mechanical properties of 3D-printed objects. Furthermore, moisture content and heat treatment profiles also play a crucial role in bonding formation and, consequently, th

关键词： Tensile strength

来源：评论

学校读者我要写书评

暂无评论

Selected application of linear composites containing side emitting optical fibres 19

Selected application of linear composites containing side em...

引用

19th International Union of Materials Research Societies - International Conference in Asia, IUMRS-ICA 2018

作者： Křemenáková, Dana Militký, Jiří Mishra, Rajesh Venkataraman, Mohanapriya Petru, Michal Technical University of Liberec Faculty of Textile Engineering Department of Material Engineering Liberec46117 Czech Republic Technical University of Liberec Faculty of Mechanical Engineering Department of the Design of Machine Elements and Mechanisms Czech Republic

The main aim of this contribution is description of side emitting plastic optical fibres basic properties and their efficient embedding into fibrous structures for creation of textile structures with active visibility in shadows. For preparation of textile structures containing side emitting plastic optical fibres the special weaving technology is used. Illumination system with light emitting diode (LED) is used as light source. Light intensity of textile structures is compared with light intensity of fibres. Incorporation of side emitting plastic optical fibres into fibrous tube provides sufficient side emission especially for plastic optical fibres with larger diameters. The corresponding technology has been developed and the possible applications were proved in real conditions. The use of side emitting POF in textile tube are still in the first stage of industrial realization and it will be necessary to optimize their composition and functionality for various targeted applications including surface effects, doping and use of special dyestuffs. © Published under licence by IOP Publishing Ltd.

关键词： Textiles

来源：评论

学校读者我要写书评

暂无评论

Fracture mechanics based assessment of fatigue of seam weld ends under shear loading

Fracture mechanics based assessment of fatigue of seam weld ...

引用

3rd International Conference of engineering Against Failure, ICEAF 2013

作者： Shams, Ehsan Malikoutsakis, Michail Savaidis, Georgios Vormwald, Michael Technische Universität Darmstadt Department of Civil Engineering and Geodesy Material Mechanics Group Petersenstrasse 12 64287 Darmstadt Germany Aristotle University of Thessaloniki Department of Mechanical Engineering Laboratory of Machine Elements and Machine Design 54124 Thessaloniki Greece

ISBN: (纸本)9789608810433

Stress intensity factors are calculated along the weld root for load carrying welded joints under shear loading. The value of the stress intensity factor increases towards the weld end points as expected. An extrapolation procedure is suggested for the determination of a weld end point associated stress intensity factor where the stress singularity is no longer of the crack front type. In the experimental part of this research fatigue testing of thin sheet plane and cylindrical specimens was performed. The fatigue cracks initiated at the weld end points. A weld-end life curve has been obtained which is expressed in terms of the weld end stress intensity factor range. The thin sheet results are compared to results of a thick sheet member of a motor truck to discuss the transferability of fatigue data for different geometrical items.

关键词： Welds

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：