  In this work, we investigated the mechanical response and fracture dynamics
of boron nitride nanotubes (BNNTs)-peapods under ultrasonic velocity impacts
(from 1 km/s to 6 km/s) against a solid target. BNNT-peapods are BNNTs
containing an encapsulated linear arrangement of C60 molecules. We carried out
fully atomistic reactive (ReaxFF) molecular dynamics simulations. We have
considered the case of horizontal and vertical shootings. Depending on the
velocity values we observed tube bending, tube fracture, and C60 ejection. One
interesting result was tube unzipping with the formation of bilayer nanoribbons
'incrusted' with C60 molecules.
