Computational Study for the Characterization of Fiber-metal Laminates Using Lamb Wave Propagation

Guided waves have shown great potential in monitoring large structures. The purpose of this study was to assess the ability of guided Lamb waves for the characterization of fiber-metal laminates (FMLs) through finite element method (FEM) simulations. The developed FEM model consisted of an FML sample with [Al/90/Al/90/Al] layup, an actuator and several sensors. Anti-symmetric Lamb waves with different frequencies ranging from 50 to 400 kHz were propagated on the sample using the actuator. The sensors were then used to obtain the induced wave characteristics, including the displacement phase and amplitude at different locations along the propagation direction. The Lamb wave velocity was obtained using the measured wave characteristics. Then, the corresponding inverse Lamb wave propagation problem was solved and the elastic modulus of the FML sample was estimated. The measured elastic modulus values were compared with the results reported in experimental prior research work and obtained using the classical lamination theory (CLT) and found to be in good agreement. Therefore, the validity of the proposed nondestructive characterization method was proved

کلیدواژه ها:

Fiber-metal laminates (FMLs) ، Non-destructive evaluation ، Lamb wave ، Mechanical Properties.