Researcher's Information

Professor

WATANABE, Keiko

Mechanical Engineering

Clarification of high-speed impact phenomenon accompanying shock waves

The high-speed impact accompanying the shock waves is a very interesting research subject in physics because unique phenomena that can never happen under the static and dynamic loading are induced. The main subject is the clarification of fracture and propagation behavior of waves induced by the impact. In particular, we recently focus on the high-speed penetration phenomenon into geological particulate materials such as sands. Since particles are heterogeneity and instability, both behaviors as solid and liquid exist and the three states of matter (solids, liquids and gases) are mixed, phenomena are so complicated and less understood. This is not only basic research of high-speed impact phenomena but research of engineering significance, such as the product development using a non-Newtonian phenomenon, the establishment of planetary exploration technology, the establishment of protection technology against highspeed scattering objects and the development of new excavation technology and geological survey technique.
  • Behavior of ejecta during highspeed penetration into sands