Simulation of Guided Wave Propagation in Isotropic and Composite Structures using LISA

Abstract

This paper presents a local interaction simulation approach (LISA) numerical method to examine the guided wave propagation in plate and sandwich structures. The method is based on recursive iterative equations, derived from the elastodynamic equilibrium equations. Derivation of the iterative equations with varying spatial discretizations is presented for a generalized orthotropic medium in non-principle axis frame. The new iterative equations have the capability to model generic laminated composite plates and sandwich composite structures. The results address some of the propagation aspects in isotropic plates, laminated composite plates, and simple composite foam core sandwich.