Investigations on Guided Ultrasonic Wave Dispersion Behavior in Fiber Metal Laminates Using Finite Element Eigenvalue Analysis

Composite materials such as fiber metal laminates combine the advantages of metallic and fiber-reinforced polymers. Hence, these are great interest for thin-walled structures in lightweight engineering. Due to structure materials, damage laminate components occur more frequently inside than with conventional materials. Since detection interlaminar is complicated compared external damage, it one biggest challenges use laminates. One approach detect this kinds guided ultrasonic waves, example Lamb waves. To be able perform detection, knowledge about propagation behavior kind waves fundamental. Abrupt stiffness variations across thickness laminates, resulting from different material layers, lead question whether known approaches isotropic transversely applicable here. Therefore, objective work investigate fiber-metal over large frequency ranges. For purpose, dispersion relations finite element simulations experimental data numerical solutions based on analytical framework. The investigations carried out using a consisting steel carbon orthotropy laminate, wave direction perpendicular considered. linear two dimensional eigenvalue analysis used. This method especially suitable because offers very efficient modeling application. measurements contained previous publications by authors. comparison framework show that they good agreement. results shown serve validate presented allow further, complex simulations.