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  • Articles  (2)
  • ultrasonic scattering  (2)
  • 1980-1984  (2)
  • 1930-1934
  • 1925-1929
  • 1982  (2)
  • Electrical Engineering, Measurement and Control Technology  (2)
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  • Articles  (2)
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Keywords
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  • 1980-1984  (2)
  • 1930-1934
  • 1925-1929
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Topic
  • Electrical Engineering, Measurement and Control Technology  (2)
  • Mathematics  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Time domain Born approximation (1982)
    Springer
    Journal of nondestructive evaluation 3 (1982), S. 45-53 
    Details
    ISSN: 1573-4862
    Keywords: Born approximation ; ultrasonic scattering ; NDE ; time domain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract The time domain Born approximation for ultrasonic scattering from volume flaws in an elastic medium is described. Results are given both for the direct and the inverse problem. The time domain picture leads to simple intuitive formulas, which we illustrate by means of several simple examples. Particular emphasis is given to the front surface echo and its use in reconstructing the properties of the flaw.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00566954
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of pipeline girth welds using low-frequency horizontally polarized waves (1982)
    Springer
    Journal of nondestructive evaluation 3 (1982), S. 155-173 
    Details
    ISSN: 1573-4862
    Keywords: elastic waves ; electromagnetic transducers ; nondestructive evaluation ; ultrasonic transducers ; ultrasonic scattering ; ultrasonic waves ; wave phenomena
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract The practical implementation of alternative acceptance criteria for pipeline girth welds requires the use of inspection tools capable of determining the principal dimensions and positions of planar flaws. A new ultrasonic inspection method is described that permits complete volumetric inspection of the girth welds. The new system uses noncontacting electromagnetic-acoustic transducers (EMATs) that operate at low ultrasonic frequencies (454 kHz). Theoretical models of the measurements are developed and verified experimentally. In addition, practical performance limits of the new system are established in terms of minimum flaw sizes that can be detected. The results are related to accept-reject curves based on a model of the failure processes. An inspection protocol for field applications is also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00566557
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    Paper (German National Licenses)
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