Accession Number : ADA300678

Title :   Acousto-Ultrasonic Input-Output Characterization of Unidirectional Fiber Composite Plate by P Waves,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Liao, Peter ; Williams, James H., Jr

PDF Url : ADA300678

Report Date : JUL 1988

Pagination or Media Count : 77

Abstract : The single reflection problem for an incident P wave at a stress-free plane boundary in a semi-infinite transversely isotropic medium whose isotropic plane is parallel to the plane boundary is analyzed. It is found that an obliquely incident P wave results in a reflected P wave and a reflected SV wave. The delay time for propagation between the transmitting and the receiving transducers is computed as if the P waves were propagating in an infinite half space. The displacements associated with the P waves in the plate and which may be detected by a noncontact NDE receiving transducer are approximated by an asymptotic solution for an infinite transversely isotropic medium subjected to a harmonic point load.

Descriptors :   *FIBER REINFORCED COMPOSITES, FIBERGLASS, NONDESTRUCTIVE TESTING, STRESS ANALYSIS, ACOUSTIC WAVES, LOADS(FORCES), DISPLACEMENT, HARMONICS, ELASTIC PROPERTIES, COMPOSITE STRUCTURES, REFLECTION, PLATES, ISOTROPISM, ASYMPTOTIC SERIES, AEROSPACE CRAFT, TRANSDUCERS, ULTRASONIC TESTS.

Subject Categories : Laminates and Composite Materials
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE