caa a22 4500 397572417 CHVBK 20180308164845.0 cr unu---uuuuu 161202e199611 xx s 000 0 eng 10.1093/qjmam/49.4.657 doi (NATIONALLICENCE)oxford-10.1093/qjmam/49.4.657 CRASTER R. V. Department of Theoretical Mechanics, University of Nottingham, Nottingham NG7 2RD WAVEFRONT EXPANSIONS FOR PULSE SCATTERING BY A SURFACE INHOMOGENEITY [Elektronische Daten] [R. V. CRASTER] Much recent interest has arisen in the coupled dynamics of fluid-solid interfaces, mainly with regard to the use of the acoustic microscope as a valuable technique for material characterization and the detection of surface, and subsurface, flaws; there is also interest in structural acoustics and geophysical applications. The majority of recent work has dealt with time-harmonic waves; in this paper solutions for transient disturbances are developed and analysed in detail. The resulting fluid and solid responses are found in closed form allowing specific wavefronts to be identified and explicit results are given. Wavefront expansions for the head waves and cylindrical wave in the fluid are found explicitly together with the disturbance generated by the leaky Rayleigh wave; these are the dominant fluid responses detected experimentally and such exact solutions will be of value. The limit of light fluid loading is examined separately; it is shown that the leading-order fluid-solid results are reconstructed by considering simpler problems where the fluid loading is taken to be absent. An unambiguous interpretation of the disturbance in the fluid created by the leaky Rayleigh wave is given in this light fluid-loading limit. © Oxford University Press Articles nationallicence The Quarterly Journal of Mechanics and Applied Mathematics Oxford University Press 49/4(1996-11), 657-674 0033-5614 49:4<657 1996 49 qjmamj https://doi.org/10.1093/qjmam/49.4.657 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/qjmam/49.4.657 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- CRASTER R. V. Department of Theoretical Mechanics, University of Nottingham, Nottingham NG7 2RD NATIONALLICENCE 773 0- The Quarterly Journal of Mechanics and Applied Mathematics Oxford University Press 49/4(1996-11), 657-674 0033-5614 49:4<657 1996 49 qjmamj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford