Modeling lamb wave propagation in visco-elastic composite plates using a fifth-order plate theory

A new extension of the shear deformation theory to fifth order in calculate spectrum Lamb waves orthotropic media over a wide frequency range is developed and analyzed. The aspiration proposed method create an alternative framework exhaustive 3D elasticity based solutions by increasing computational efficiency without losing accuracy, nor robustness. introduced which allows estimate dispersion curves for first nine symmetric anti-symmetric modes. Analytically calculated using 5-SDT different propagation directions polar plots selected materials are compared with results from both semi analytical finite element method, lower theories. Careful analysis individual laminae composite laminates exhibits good agreement between higher plate extensive range. In addition, attenuation show that can also be used visco-elastic (or highly damped materials). advantage its numerical implementation it much more computationally efficient comprehensive methods as wave plates function incidence angle, angle less than second on standard laptop. Consequently, use this inversion routines opens up possibility quasi real-time Structural Health Monitoring composites covering sufficiently