Abstract
The present article studies the problem concerning impact load on a finite crack in the presence of a magnetic field on the crack surface in an infinite isotropic medium. Laplace and Abel’s transform are used to reduce the boundary value problem to a Fredholm integral equation of the 2nd kind. The integral equation is solved by the asymptotic series expansion method for low frequency. The expression of stress intensity factor (SIF) and crack opening displacement (COD) have been derived in the Laplace transform domain, and finally switched to the time domain with the help of Zakian’s Laplace inversion algorithm. The effect of magnetic field on SIF and COD has been discussed employing graphs. We found that a ferromagnetic substance such as Iron, Cobalt, Nickel, etc. is more capable to prevent the crack growth due to normal impact. Magnetic field can not prevent the crack growth in case of sliding mode.
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