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On the stability of the FDTD algorithm for elastic media at a material interface

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2 Author(s)
C. T. Schroder ; Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; W. R. Scott

In this paper, the stability behavior of the first-order finite-difference time-domain algorithm for elastodynamics at the interface between two different materials is investigated. A necessary condition for stability is established, which, dependent on the material properties of the two media, might be more restrictive than the well-known Courant condition. It is shown that this more restrictive stability condition can be avoided if the material properties are averaged on the boundary

Published in:

IEEE Transactions on Geoscience and Remote Sensing  (Volume:40 ,  Issue: 2 )