Dynamic crack growth along heterogeneous planar interfaces: Interaction with unidimensional strips

We examine theoretically and numerically fast propagation of a tensile crack along unidimensional strips with periodically evolving toughness. In such dynamic fracture regimes, front waves form transport disturbances the edge at speed less than Rayleigh wave depending on speed. this configuration, standing dictate spatiotemporal evolution local speed, which takes specific scaling form. Analytical examination both short-time long-time limits problem reveals parameter dependency strip wavelength, toughness contrast overall Implications generalization to arbitrary shape are lastly discussed.