Ultrasonic Attenuation as a Method of Nondestructive Evaluation of Graphite Epoxy Composites Undergoing Compression-compression Fatigue PDF Download
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Author: Beth Doll
Publisher:
ISBN:
Category : Carbon composites
Languages : en
Pages : 74
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Author: Beth Doll
Publisher:
ISBN:
Category : Carbon composites
Languages : en
Pages : 74
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Author:
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Category :
Languages : en
Pages : 28
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Author: James H. Williams
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Category : Quality control
Languages : en
Pages : 28
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ISBN:
Category : Aeronautics
Languages : en
Pages : 512
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Author:
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ISBN:
Category :
Languages : en
Pages : 886
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Author: James H. Williams
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Category : Sound
Languages : en
Pages : 44
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1282
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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725052666
Category :
Languages : en
Pages : 36
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The ultrasonic group velocity and attenuation were measured as a function of frequency for longitudinal and shear waves in the epoxy matrix (3501-6) and in the principal directions of the unidirectional graphite/epoxy composite (AS/3501-6). Tests were conducted in the frequency ranges 0.25 Mz to 14 MHz and 0.5 Mz to 3 MHz for longitudinal and shear wave modes, respectively. The attenuation increased with frequency for all wave modes, but the group velocity was independent of frequency for all wave modes. The effects of pressure and couplant at the transducer-specimen interface were studied and it was found that for each transducer type there exists a frequency dependent 'saturation pressure' corresponding to the maximum output signal amplitude. Williams, J. H., Jr. and Nayebhashemi, H. and Lee, S. S. Unspecified Center NASA-CR-3180 NSG-3210...
Author: J. K. White
Publisher:
ISBN:
Category : Nuclear reactions
Languages : en
Pages : 24
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Author:
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Category :
Languages : en
Pages : 34
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