Four two-dimensional configurations are considered in this paper. The first two concern a homogeneous slab (0≤y≤H, -∞<x<∞), with a surface-breaking crack (x=0, 0≤y≤a), and without such a crack. The other two configurations concern semi-infinite slabs of different mechanical properties which are in welded contact over x=0, 0≤y≤H. One of these has a surface-breaking crack in the interface (x=0, 0≤y≤a), and the other has perfect contact over the whole interface. Results are presented for diffraction and corner reflection of an ultrasonic displacement pulse. Time-domain calculations have been carried out bu the use of the finite difference method. The results are presented as full-field snapshots of the displacement fields at specified times, and as time histories of the particle velocity at the midpoint of the transducer-specimen interface at x=-H, y=H.
ASJC Scopus subject areas
- Physics and Astronomy(all)