Showing papers by "Subhendu K. Datta published in 1998"
TL;DR: In this paper, the authors considered the scattering by an infinite circular cylinder in a transversely isotropic, elastic medium, where the symmetry axis of the medium is parallel to the cylinder axis and the incident field was taken as a plane wave of quasi P, quasi SV or SH type.
28 citations
TL;DR: In this paper, the Cauchy Principal Value integrals and weakly singular integrals involved in the boundary integral equations have been employed and modifided to treat the corner points on the boundary.
Abstract: Transient response of a composite plate with a near-surface delamination has been studied in this paper A new technique developed by the authors to evaluate the Cauchy Principal Value integrals and the weakly singular integrals involved in the boundary integral equations has been employed and modifided to treat the corner points on the boundary The time harmonic Green's functions appearing in the bound-ary integral equation are evaluated by combining a stiffness method and the modal summation technique To circumvent the difficulties associated with the evaluation of hypersingular integrals for cracks, the multidomain technique is employed, The accuracy and efficiency of the method are checked by comparing the displacements in a uniaxial graphite-epoxy plate containing a delamination with results obtained by a hybrid method It is shown that the presence of the delamination significantly alters the surface response spectra of the plate, Results are presented in both time and frequency domains The results show that the technique would be useful for ultrasonic nondestructive evaluation of defects in composite and anisotropic plates, and for studying dynamic response of such plates to impact
11 citations