  Integrity of layered structures, extensively used in modern industry,
strongly depends on the quality of their interfaces; poor adhesion or
delamination can lead to a failure of the structure. Can nonlinear waves help
us to control the quality of layered structures? In this paper we numerically
model the dynamics of a long longitudinal strain solitary wave in a split,
symmetric layered bar. The recently developed analytical approach, based on
matching two asymptotic multiple-scales expansions and the integrability theory
of the KdV equation by the Inverse Scattering Transform, is used to develop an
effective semi-analytical numerical approach for these types of problems. We
also employ a direct finite-difference method and compare the numerical results
with each other, and with the analytical predictions. The numerical modelling
confirms that delamination causes fission of an incident solitary wave and,
thus, can be used to detect the defect.
