Download or read book A Study of High Speed Friction written by and published by . This book was released on 1978 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high speed friction and wear machine has been developed for operation in the 100-500 feet per second regime. Normal loads up to ten pounds are used with the upper limit determined by the force transducer. Signals corresponding to the frictional and normal forces are electronically divided to indicate the friction coefficient. All data is recorded on a high speed oscillograph. Wear of test materials is determined by weight loss measurement. Interfacial temperature measurements via thermoelectric effects and optical pyrometry can be made. The apparatus and associated instrumentation is described in detail. Results indicate a decreasing friction coefficient with increasing sliding speed. This is due to thermal softening, leading to the presence of low shear films at the interface. However, full hydrodynamic lubrication is not reached in the range of loads and velocities tested so the friction coefficient does not get below 0.14. The wear coefficient increases with sliding speed very rapidly. This is probably due to the change in hardness of the test materials at high temperatures. The following materials were tested against 4140 steel: 70- 30 brass, gliding metal, copper, copper-16% lead, nylon, DQ3, Rulon A, vulcanized fiber, constantan, zinc, bismuth, Delrin, solder, grafite, iron, polycarbonate, polyethylene and woods metal.
Download or read book Proceedings of the 1st International Workshop on High Speed and Intercity Railways written by Yi-Qing Ni and published by Springer Science & Business Media. This book was released on 2012-02-21 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the papers included in the proceedings of the 1st International Workshop on High-speed and Intercity Railways (IWHIR 2011) held in Shenzhen and Hong Kong, China from July 19 to July 22, 2011, which is organized by The Hong Kong Polytechnic University, in collaboration with Southwest Jiaotong University, Beijing Jiaotong University, Dalian Jiaotong University, China Engineering Consultants, Inc., Zhejiang University, and Tsinghua University. Continuing the great initiatives and momentums of the rapid development in high-speed and intercity railways worldwide in recent years, IWHIR 2011 aims at providing a platform for academic scholars and practicing engineers to share knowledge and experience, to promote collaboration, and to strengthen R&D activities related to railway engineering. Engineers, scientists, professors, and students from universities, research institutes, and related industrial companies have been cordially invited to participate in the workshop. These papers have covered a wide range of issues concerning high-speed and intercity railways in the theoretical, numerical, and experimental work pertaining to high-speed and intercity railways. Showcasing diversity and quality, these papers report the state-of-the-art and point to future directions of research and development in this exciting area.
Download or read book Research in Progress written by and published by . This book was released on 1974 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in progress written by United States. Army Research Office, Research Triangle Park, N.C. and published by . This book was released on 1978 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Test Machinery for Use in High Speed Friction Experiments written by Philip Presser and published by . This book was released on 1957 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Friction Under Unsteady High speed Conditions written by V. M. Goryunov and published by . This book was released on 1968 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the investigation was a study of the temperature conditions, the friction and wear characteristics, and the nature of the wear for a number of alloys and metals at sliding speeds of the order of 220 meters/sec and higher. The friction unit used is shown schematically. This unit made it possible to investigate simultaneously the friction of two samples, identical in construction, but which could be different or the same in material. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Study of High Speed Friction Stir Welding written by Muhammad Ahmad and published by . This book was released on 2003 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Proceedings of the 18th Annual Conference of China Electrotechnical Society written by and published by Springer Nature. This book was released on 2024 with total page 873 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers outstanding papers presented at the 18th Annual Conference of China Electrotechnical Society, organized by China Electrotechnical Society (CES), held in Nanchang, China, from September 15 to 17, 2023. It covers topics such as electrical technology, power systems, electromagnetic emission technology, and electrical equipment. It introduces the innovative solutions that combine ideas from multiple disciplines. The book is very much helpful and useful for the researchers, engineers, practitioners, research students, and interested readers.
Download or read book The Manchester Benchmarks for Rail Vehicle Simulation written by S. Iwnicki and published by Routledge. This book was released on 2017-11-01 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the results of the Manchester Benchmarking exercise for railway vehicle dynamics simulation packages. Five of the main computer packages currently used for this purpose were examined in the exercise and the results are presented in the form of tables and graphs.
Download or read book Friction and Wear in Polymer Based Materials written by V. A. Bely and published by Elsevier. This book was released on 2013-10-22 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Friction and Wear in Polymer-Based Materials discusses friction and wear problems in polymer-based materials. The book is organized into three parts. The chapters in Part I cover the basic laws of friction and wear in polymer-based materials. Topics covered include frictional interaction during metal-polymer contact and the influence of operating conditions on wear in polymers. The chapters in Part II discuss the structure and frictional properties of polymer-based materials; the mechanism of frictional transfer when a polymer comes into contact with polymers, metals, and other materials; and controlling the frictional properties of polymer materials. Part III is devoted to applications of polymer-based materials in friction assemblies. It covers composite self-lubricating materials and polymer materials for complexly loaded main friction assemblies. This work may prove useful to specialists interested in the problems of using polymer materials. It also aims to stimulate deeper research into the field of friction and wear in polymer-based materials.
Download or read book Proceedings of the 8th Pacific Rim International Conference on Advanced Materials and Processing PRICM 8 written by FernD.S. Marquis and published by Springer. This book was released on 2017-03-21 with total page 3431 pages. Available in PDF, EPUB and Kindle. Book excerpt: PRICM-8 features the most prominent and largest-scale interactions in advanced materials and processing in the Pacific Rim region. The conference is unique in its intrinsic nature and architecture which crosses many traditional discipline and cultural boundaries. This is a comprehensive collection of papers from the 15 symposia presented at this event.
Download or read book Studies on Dynamics and Instrumentation of the Holloman Track written by Air Force Missile Development Center (U.S.) and published by . This book was released on 1959 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Japanese Science and Technology written by and published by . This book was released on 1986 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Scanning Probe Methods XII written by Bharat Bhushan and published by Springer Science & Business Media. This book was released on 2008-10-24 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crack initiation and growth are key issues when it comes to the mechanical reliab- ity of microelectronic devices and microelectromechanical systems (MEMS). Es- cially in organic electronics where exible substrates will play a major role these issues will become of utmost importance. It is therefore necessary to develop me- ods which in situ allow the experimental investigation of surface deformation and fracture processes in thin layers at a micro and nanometer scale. While scanning electron microscopy (SEM) might be used it is also associated with some major experimental drawbacks. First of all if polymers are investigated they usually have to be coated with a metal layer due to their commonly non-conductive nature. Additi- ally they might be damaged by the electron beam of the microscope or the vacuum might cause outgasing of solvents or evaporation of water and thus change material properties. Furthermore, for all kinds of materials a considerable amount of expe- mental effort is necessary to build a tensile testing machine that ts into the chamber. Therefore, a very promising alternative to SEM is based on the use of an atomic force microscope (AFM) to observe in situ surface deformation processes during straining of a specimen. First steps towards this goal were shown in the 1990s in [1–4] but none of these approaches truly was a microtensile test with sample thicknesses in the range of micrometers. To the authors’ knowledge, this was shown for the rst time by Hild et al. in [5]. 16.
Download or read book Keywords Index to U S Government Technical Reports written by United States. Department of Commerce. Office of Technical Services and published by . This book was released on 1962-06 with total page 1176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
