Accession Number : AD0712376

Title :   PULSE PROPAGATION IN A LAMINATED MEDIUM,

Corporate Author : IOWA UNIV IOWA CITY DEPT OF MECHANICS AND HYDRAULICS

Personal Author(s) : Valanis,Kirk C.

Report Date : SEP 1970

Pagination or Media Count : 23

Abstract : The properties of a stratified elastic medium, with respect to propagation of stress pulses in a direction normal to the layers are examined. The medium is found to possess a dispersion curve with passing and stopping bands. If a ringing pulse has a frequency in a stopping band it will not propagate but will quickly attenuate; conversely, if its frequency lies in a passing band it will propagate with a group velocity corresponding to that particular frequency. The medium resolves ordinary pulses into two classes of ringing pulses, those which propagate and those which attenuate. Thus the energy admittance of the medium can be reduced by suitably narrowing the passing bands. Analytical solutions for propagating and attenuating pulses are given. (Author)

Descriptors :   (*LAMINATES, MECHANICAL WAVES), PROPAGATION, STRESSES, VIBRATION, ATTENUATION, ACOUSTIC PROPERTIES

Subject Categories : Miscellaneous Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE