Download or read book The Cryogenic Temperature Tensile Testing Apparatus written by E. Yao and published by . This book was released on 1972 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tensile Testing 2nd Edition written by Joseph R. Davis and published by ASM International. This book was released on 2004 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Apparatus for Measuring Tensile and Compressive Properties of Solid Materials at Cryogenic Temperatures written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An apparatus for evaluating the tensile and compressive properties of material samples at very low or cryogenic temperatures employs a stationary frame and a dewar mounted below the frame. A pair of coaxial cylindrical tubes extend downward towards the bottom of the dewar. A compressive or tensile load is generated hydraulically and is transmitted by the inner tube to the material sample. The material sample is located near the bottom of the dewar in a liquid refrigerant bath. The apparatus employs a displacement measuring device, such as a linear variable differential transformer, to measure the deformation of the material sample relative to the amount of compressive or tensile force applied to the sample.
Download or read book Polymers at Cryogenic Temperatures written by Susheel Kalia and published by Springer Science & Business Media. This book was released on 2013-03-26 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kalia and Fu's novel monograph covers cryogenic treatment, properties and applications of cryo-treated polymer materials. Written by numerous international experts, the twelve chapters in this book offer the reader a comprehensive picture of the latest findings and developments, as well as an outlook on the field. Cryogenic technology has seen remarkable progress in the past few years and especially cryogenic properties of polymers are attracting attention through new breakthroughs in space, superconducting, magnetic and electronic techniques. This book is a valuable resource for researchers, educators, engineers and graduate students in the field and at technical institutions.
Download or read book Low Temperature Tensile Testing Equipment and Results 300 20 K written by Richard H. Kropschot and published by . This book was released on 1953 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Cryogenic Engineering written by K. D. Timmerhaus and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Support from the National Science Foundation has made it possible for the tenth annual Cryogenic Engineering Conference, hosted by the University of Pennsylvania and capably directed by K. R. Atkins and his staff, to emphasize the major international advances in cryogenic engineering. This specific emphasis resulted in a final program of over one hundred papers and has made it necessary to publish the proceedings of the conference in two volumes. The first volume will be similar in nature to previous volumes in this series, while the second volume will feature the international aspect of the conference program. The latter volume, because of this distinction, will be entitled International Advances in Cryogenic Engineering. As in the past, the Cryogenic Engineering Conference Committee gratefully acknow ledges the assistance of all the dedicated workers in the cryogenic field who have contributed their time in reviewing the preliminary papers for the program and the final manuscripts for this volume. Since the list of participants in this thankless task numbers well over one hundred, any attempt to acknowledge their individual contributions in the limited space available would be practically impossible.
Download or read book Control of Peak Stresses in Tensile Testing Machine Components Subjected to Shock Loading written by Jack Alan Mitchell and published by . This book was released on 1964 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanical properties of materials at cryogenic temperatures have been the subject of increasing interest during the past few years, although very little actual materials testing has been done at extremely low temperatures because of the high cost and low heat of vaporaization of liquid helium. Recently, the Department of Mechanical and Industrial Engineering at Oregon State University initiated a research program of materials testing at liquid helium temperatures, 4.2° K.A specially designed cryogenic tensile testing machine has been built employing a variable rate of loading and an electronic chart drive recorder. A Baldwin U-1 load cell was placed in the loading column of the testing machine to measure the magnitude of the applied load. Previous experience has found that damage to the load cell can occur because of the shock environment present upon fracture of a tensile specimen. The object of this thesis is to analyze the effects of shock loading on the cryogenic tensile testing machine and to develop a means of reducing any shock environment seen by the load cell, After determining that 92.6 percent of the strain energy in the loading column was stored in the tensile rod between the load cell and tensile specimen, a theoretical analysis of the response of the tensile rod and load cell to specimen fracture was made using the mathematical model of a long, slender rod with fixed-free end conditions and a suddenly removed axial load. The theoretical fundamental frequencies of the tensile rod and load cell were found to be 1570 and 5940 cycles per second, respectively. In order to verify the problem of a shock environment imposed on the load cell and to check the theoretical results, an experimental study of the actual system was made. Strain gages on the tensile rod, on the adapter above the load cell, and in the load cell measured the motion response of these components to specimen fracture at room temperature. An oscilloscope and camera were used to record the results. The actual fundamental frequencies of the tensile rod and load cell were 1080 and 3250 cycles per second, respectively, and the assumed problem of shock environment on the load cell was verified. After studying many methods of absorbing and damping the shock loading, it was decided to design and fabricate a shock absorber having a piston and cylinder arrangement with a shock absorbing medium placed between the piston and cylinder head. Polyethylene and polyester urethane foams were chosen as possible shock absorbing mediums because of their excellent energy dissipation properties in compression. After the shock absorber was fabricated and placed in the testing machine, its effectiveness was determined by following the experimental procedures previously used. Results indicated that the initial load release was adequately damped with polyethylene foam. Less damping was noticed with the polyester foam. In both cases, however, a delayed peak compressive force on the load cell occurred three milliseconds after specimen fracture. When it was determined that this force was due to the motion of the top plate of the testing machine, the jack on the top plate was spring mounted. Test results of this system showed that the maximum peak compressive force following specimen fracture was reduced to 15 percent of the tensile force before fracture when polyethylene foam was used as the shock absorbing medium; however, when the polyester foam was used, the test results indicated that the foam bottomed out. Polyethylene foam thus proved to be a substantially superior solution to the problem under consideration.
Download or read book Evaluation of Indirect Tensile Test IDT Procedures for Low temperature Performance of Hot Mix Asphalt written by Donald W. Christensen and published by Transportation Research Board. This book was released on 2004 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Applications -- Conclusions and Recommendations -- References -- Appendixes.
Download or read book Advances in Cryogenic Engineering Materials written by U. Balu Balachandran and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1999 Joint Cryogenic Engineering Conference (CEC) and International Cryogenic Materials Conference (ICMC) were held in Montreal, Quebec, Canada from July 12th to July 16th. The joint conference theme was "Cryogenics into the Next Millennium". The total conference attendance was 797 with participation from 28 countries. As with previous joint CEC and ICMC Conferences, the participants were able to benefit from the joint conference's coverage of cryogenic applications and materials and their interactions. The conference format of plenary, oral and poster presentations, and an extensive commercial exhibit, the largest in CEC-ICMC history, aimed to promote this synergy. The addition of short courses, workshops, and a discussion meeting enabled participants to focus on some of their specialties. The technical tour, organized by Suzanne Gendron, was of Hydro-Quebec's research institute laboratories near Montreal. In keeping with the conference venue the entertainment theme was Jazz, culminating in .the performance of Vic Vogel and his Jazz Big Band at the conference banquet. This 1999 ICMC Conference was chaired by Julian Cave of IREQ - Institut de recherche d'Hydro-Quebec, and the Program Chair and Vice-Chair were Michael Green of the Lawrence Berkeley National Laboratory and Balu Balachandran of the Argonne National Laboratory respectively. We especially appreciate the contributions of both the CEC and ICMC Boards and the conference managers, Centennial Conferences, under the supervision of Paula Pair and Kim Bass, in making this conference a success.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1966 with total page 2088 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low temperature Properties of Bituminous Materials and Compacted Bituminous Paving Mixtures written by American Society for Testing and Materials and published by ASTM International. This book was released on 1977 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical and Mechanical Properties of Pressure Vessel Materials for Application in a Cryogenic Environment written by Jose L. Christian and published by . This book was released on 1962 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this program has been to develop simple laboratory-type tests to evaluate the toughness of high strength sheet alloys and their complex welded joints at cryogenic temperatures. The tests employed for evaluating the toughness of sheet materials included notiched tensile shear tests of individual resistance spot welds, and tensile tests of simple fusion welds. These tests were conducted at 78, -100, -320, and -423 F. These data, as well as data obtained from tensile tests of the base metal, percent martensite determinations, and metallographic examinations of fractured coupons, were correlated with low-cycle, highstress fatigue data obtained on complex welded joints at 78, -320, and -423 F. The most consistant index of toughness was found to be the notched/unnotched tensile ratio. The test data are presented in tabular and in graphical form to air metallurgical and design engineers in the selection of materials for structural applications at cryogenic temperatures. The test data were reduced by statistical methods and analzed. The results of the statistical analysis, which included means, standard deviations, and statistical values are presented and their importance discussed. A description of the test equipment and experimental procedures for tensile and fatigue testing at room and cryogenic temperatures is given. This report also includes conclusions, recommendations for future work, and references.
Download or read book Tensile Behavior of Boron filament reinforced Epoxy Rings and Belts written by Robert M. Baucom and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hearings written by United States. Congress. Joint Committee ... and published by . This book was released on 1964 with total page 2166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Research written by United States. National Bureau of Standards and published by . This book was released on 1962 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Note National Advisory Committee for Aeronautics written by and published by . This book was released on 1931 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
