Monday  |  Salon 13  |  09:20 AM–09:40 AM

#15716, Shock Structure in Particulate Composites using Full-field Velocity Measurements

Understanding the shock compression in heterogeneous materials is limited but critical for applications requiring dispersing and dissipating the shock wave. In this study, normal plate impact experiments are conducted on PMMA matrix and soda lime glass particulate composites at stresses ranging from 1.1-3.1 GPa. In conjunction, full field velocity measurements are conducted for the first time at the rear free surface providing increased spatial resolution to characterize the heterogeneity of the propagating shock front. The out-of-plane and in-plane velocity fields are highly heterogeneous indicating the primary mechanism for structuring the shock in these materials is wave scattering through momentum diffusion along the transverse direction.

Vatsa Gandhi   California Institute of Technology
Suraj Ravindran   University of Minnesota
Barry Lawlor   California Institute of Technology
Guruswami Ravichandran   California Institute of Technology