...Yanghao Fang; Tsampikos Kottos; Ramathasan Thevamaran We study the elastodynamics of a periodic metastructure incorporating a defect pair that enforces a parity-time (PT) symmetry due to judiciously engineered imaginary impedance elements—one having energy amplification (gain) and the other having...

.... The inversion methods presented in this paper show improved NDE results over many of the existing algorithms. elasticity elastodynamics inverse problems nondestructive testing system monitoring multilayered medium elasticity seismic inverse problem nonlinear optimization numerical analysis...

...Lu Sun; Feiquan Luo; Wenjun Gu A rigorous theoretical foundation for solving elastodynamic inverse problem of multilayered media under an impulse load is established in this paper. The inversion is built upon the forward dynamic analysis of multilayered elastic media using transfer matrix approach...

...Ryan K. Hopman; Michael J. Leamy This study extends a recently developed cellular automata (CA) modeling approach ( Leamy, 2008, “Application of Cellular Automata Modeling to Seismic Elastodynamics,” Int. J. Solids Struct., 45(17), pp. 4835–4849 ) to arbitrary two-dimensional geometries via...

...Morteza Eskandari-Ghadi; Ronald Y. S. Pak In this paper, a complete elastodynamic solution for axisymmetric problems under axial body-forces in terms of two retarded potential functions in transversely isotropic media is extended to the case of general torsionless axisymmetry. Allowing for both...

... of the cavity surface. The dynamic stress concentration factor on the cavity surface becomes singular when the cavity is close to the boundary of the wedge. 29 11 2007 10 02 2009 23 07 2009 elasticity elastodynamics Green's function methods shapes (structures) infinite wedge...

.... , Stokoe II , K. H. , and Seng , C. R. , 1995 , “ Determination of Depth to Bedrock From Falling Weight Deflectometer Test Data ,” Transp. Res. Rec. 0361-1981 , 1504 , pp. 68 – 78 . Sun , L. , 2001 , “ Time-harmonic Elastodynamic Green’s Function of Plates For Line Loads ,” J...

... determined using the first-order shear deformation theory. These wave modes, in one of the two mutually orthogonal directions for two-dimensional transient elastodynamics, are then used to enrich the Lagrangian interpolation functions in context of displacement-based finite element. The equilibrium equation...

...A. Mahmoud; A. H. Shah; S. B. Dong In this paper, transient three-dimensional response of a transversely isotropic composite plate to a time varying point load is efficiently computed by reducing the elastodynamic equation through integral and coordinate transformations to a series of two...

... Barbara, Santa Barbara, CA 93106-5070, and will be accepted until four months after final publication in the paper itself in the ASME JOURNAL OF APPLIED MECHANICS . 25 August 2003 03 August 2004 15 03 2005 functionally graded materials elastodynamics crack-edge stress field...

... composite laminates. A semi-analytical method based on the wave number integral representation of the elastodynamic field is described that reduces the overall computational effort significantly over other available methods. This method is used to calculate the guided wave field produced in a thin...

... MECHANICS . 02 Apr 2002 05 Aug 2003 05 05 2004 elasticity elastodynamics hydrodynamics Green's function methods chemical mechanical polishing planarisation viscosity For the problem of contact with rough surfaces, several approaches using integral transforms have been...

...G. Y. Yu In this paper, a symmetric collocation boundary element method (SCBEM)/finite element method (FEM) coupling procedure is given and applied to a two-dimensional elastodynamic problem. The use of symmetry for the boundary element method not only saves memory storage but also enables...

... Division, Oct. 10, 2001, final revision, July 26, 2002. Associate Editor: J. R. Barber. 10 Oct 2001 26 July 2002 27 03 2003 thermal stresses temperature distribution thermoelasticity numerical analysis elastodynamics Recently, the thermally excited mechanical response...