Scattering of flexural waves by a cracked Mindlin plate of soft ferromagnetic material in a uniform magnetic field

Consider the impingement of time harmonic flexural waves on a through crack in a soft ferromagnetic plate the surface of which is subjected to a unifo rm magnetic field at normal incidence. Mindlin's plate theory is used to ac count for the magneto-elastic interaction. For an incident wave that gives rise to moments symmetric about the crack plane, Fourier transforms are app lied reducing the mixed boundary value problem to a Fredholm integral equat ion that can be solved numerically. The dynamic moment intensity factor ver sus frequency is computed to exhibit the influence of the magnetic field. ( C) 2000 Elsevier Science Ltd. All rights reserved.