Wednesday  |  Allegheny  |  04:40 PM–05:00 PM

#13530, Mesoscale Structure of Shock Waves in Particulate Composites

Mesoscale shock response studies are essential in particulate composites due to local heterogeneities such as impedance mismatch, the presence of interfaces, and the difference in shear strength of its constituents play a vital role in the shock structure evolution. However, most of the past investigations are devised with continuum scale point measurements, which is insufficient to characterize the mesoscale shock response. Therefore, in this study, a high Spatio-temporal resolution full-field particle velocity measurement based on digital image correlation is developed and used to investigate the mesoscopic features of shock in a representative glass-filled composite. The effect of impedance mismatch and the microstructural heterogeneities on the mesoscale features of the shock structure are studied. The full-field free surface velocity measurement shows a highly heterogeneous local particle velocity field due to the scattering of the shock waves.

Suraj Ravindran   California Institute of Technology
Vatsa Gandhi   California Institute of Technology
Guruswami Ravichandran   California Institute of Technology