Non-reflecting boundary condition for Lamb wave propagation problems in honeycomb and CFRP plates using dashpot elements

The paper’s objective is to introduce a new non-reflecting boundary condition using dashpot elements. This is an useful tool to efficiently simulate Lamb wave propagation within composite structures, such as honeycomb and CFRP plates. Due to the steadily increasing interest in applying Lamb waves in modern online structural health monitoring techniques, several numerical and experimental studies have been carried out recently. The proposed boundary condition poses the advantage of reducing the computational costs required to simulate the wave propagation in heterogenous materials. Different parameters which can influence the functionality of such an artificial boundary are discussed and several applications are presented. Finally, the results are also experimentally validated.