Impact response of a cracked soft ferromagnetic medium
Tóm tắt
A solution is given for the problem of an infinite soft ferromagnetic solid containing a central crack subjected to normal impact load. The solid is permeated by a uniform magnetostatic field normal to the crack surface. Laplace and Fourier transforms are employed to reduce the transient problem to the solution of integral equations in the Laplace transformed plane. A numerical Laplace inversion technique is used to compute the values of the dynamic stress-intensity factor, and the results are compared with the corresponding elastodynamic values to reveal the influence of magnetic field on the dynamic stress-intensity factor. The dynamic stress intensity factor is found to increase with increasing values of the magnetic field.
Tài liệu tham khảo
Sih, G. C. (ed.): Elastodynamic crack problems. Leyden: Noordhoff International Publishing 1977.
Sneddon, I. N.: Fourier transforms. New York: McGraw-Hill 1951.