## Acousto-ultrasonic input-output characterization of unidirectional fiber composite plate by P wavesNational Aeronautics and Space Administration, Scientific and Technical Information Division, 1988 - Medical - 78 pages |

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acousto-ultrasonic amplitude ratios angle of incidence angle of reflection axes balance in energy bottom face composite plate specimen coordinate system elastic constants electrical voltage energy flux normal epoxy composite plate epoxy composite shown exp{iw(Sxx fiberglass epoxy composite follows from Eqs inci incident P wave infinite transversely isotropic input Input-Output Characterization isotropic plane non-contact receiving transducer Nondestructive Evaluation normal is parallel normal stress rzz number of reflections obtained from Eqs particle displacement phase velocity plane is parallel point load acting positive y-z quadrant radian frequency reflected P wave reflected SV reflection occurs respectively semi-infinite transversely isotropic shear stress shown in Fig Similarly single reflection problem slowness surface slowness vector stress-free plane boundary Sy(I Sy(p Sz(p transversely isotropic medium unidirectional fiberglass epoxy unit vector values vector of particle wave in unidirectional wave is equal wave of unit waves propagating y-z plane zonal axis