Download or read book Elastic Moduli and Damping of Vibrational Modes of Aluminum Silicon Carbide Composite Beams written by and published by . This book was released on 1996 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elastic Moduli and Damping of Vibrational Modes of Aluminum Silicon Carbide Composite Beams written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elastic and shear moduli were determined for two aluminum matrix composites containing 20 and 40 volume percent discontinuous silicon carbide, respectively, using transverse, longitudinal, and torsional vibrational modes of specimens prepared as thin beams. These moduli are consistent with those determined from stress-strain measurements. The damping factors for these modes were also determined. Thermal properties are used to show that part of the damping of transverse modes is caused by the transverse thermal currents discussed by C. Zener (thermo-elastic damping); this damping is frequency-dependent with a maximum damping factor of approximately 0.002. The remaining damping is frequency-independent, and has roughly similar values in transverse, longitudinal, and torsional modes: approximately 0.0001. Leidecker, Henning Goddard Space Flight Center...

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Download or read book Microelectromechanical Systems Volume 1139 written by Srikar Vengallatore and published by Cambridge University Press. This book was released on 2009-06-23 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microelectromechanical systems (MEMS) have transitioned from a technology niche to a role of major industrial significance. The worldwide market for MEMS is now approximately $10 billion, and the total value of systems enabled by MEMS is several orders of magnitude higher than this figure. As the market has grown, the material and process sets have broadened and departed from their semiconductor roots. In addition to engineering materials, there is now great interest in integrating multifunctional nanomaterials, smart materials and biomaterials within MEMS/NEMS to enhance functionality, performance and reliability. The opportunities created by this integration have generated a vibrant research community working on new materials and processes. This book reflects the breadth of topics currently under investigation in the field. Novel materials and accompanying processes are discussed, as are more conventional materials and processes. Consistent themes are the need for accurate material property assessment at the relevant length scales and for suitable metrology tools to support the introduction of new materials.

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Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1634 pages. Available in PDF, EPUB and Kindle. Book excerpt: