Showing papers by "Subhendu K. Datta published in 1990"
TL;DR: In this paper, the scattering of elastic waves by elastic inclusions surrounded by interface layers is studied by means of the null field approach and the properties of the interface layer enters through the boundary conditions on the inclusion.
Abstract: The scattering of elastic waves by elastic inclusions surrounded by interface layers is a problem of interest for nondestructive evaluation of interfaces in composites. In the present paper the scattering by a single elastic inclusion is studied. The scattering problem is solved by means of the null field approach and the properties of the interface layer enters through the boundary conditions on the inclusion
54 citations
TL;DR: Early work on dispersion of Rayleigh and Love waves was by Love as discussed by the authors, who gave the first comprehensive treatment of the case of an elastic solid half-space covered by a single solid layer.
Abstract: Early work on dispersion of Rayleigh and Love waves was by Love [1], who gave the first comprehensive treatment of the case of an elastic solid half-space covered by a single solid layer.
19 citations
TL;DR: In this paper, the scattering of Rayleigh-Lamb waves by a normal surface-breaking crack in a plate has been studied both theoretically and experimentally, and the theoretical results of plate response, both in frequency and time, are similar to those obtained experimentally.
Abstract: Scattering of Rayleigh-Lamb waves by a normal surface-breaking crack in a plate has been studied both theoretically and experimentally. The two-dimensionality of the far field, generated by a ball impact source, is exploited to characterize the source function using a direct integration technique. The scattering of waves generated by this impact source by the crack is subsequently solved by employing a Green's function integral expression for the scattered field coupled with a finite element representation of the near field. It is shown that theoretical results of plate response, both in frequency and time, are similar to those obtained experimentally. Additionally, implication for practical applications are discussed.
14 citations
TL;DR: In this article, the authors studied the wave propagation in a cross-ply laminated plate and showed that a sufficiently large number of layers is required for the plate to be modeled as a homogeneous anisotropic plate.
6 citations
15 Jun 1990-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the effect of interface layers on wave propagation in a composite medium has been investigated in two systems: scattering of waves by an inclusion with a thin interface layer and guided waves in a laminated plate with thin interface layers.
Abstract: Effect of interface layers on wave propagation in a composite medium has been investigated in this paper. Two systems are considered: scattering of waves by an inclusion with a thin interface layer and guided waves in a laminated plate with thin interface layers. In the first case the presence of interface layers is found to modify the scattering cross-section significantly. In the second case it is found that guided waves in a laminated plate are slowed down considerably in the presence of soft interface layers. The results of this study can be used to characterize interface layers by ultrasonic techniques.
1 citations