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2 1997

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Discretization schemes for the simulation of nonlinear propagation equations

Delsanto P. P., Scalerandi M.

Hydroacoustics

1997

Vol. 1

65--70

A technique is proposed for testing the stability and convergence of Finite Differences schemes for the simulation of the propagation of pulses in non linear media. As a first application, the propagation of a semi-infinite sine pulse in a medium with a periodic non linearity is analyzed.

A spring model for perfect or imperfect contact interfaces

Delsanto P. P., Ruffino E., Scalerandi M., Batra N. K., Mignogna R. B.

Hydroacoustics

1997

Vol. 1

257--262

A spring model for the simulation of the propagation of ultrasonic pulses through perfect or imperfect interfaces is proposed in the framework of the local interaction simulation approach (LISA). To demonstrate the applicability of the technique (which is particularly suitable for parallel processing) a few examples of numerical simulation of pulse propagation through interfaces with a delamination are presented and discussed.