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Direct measurements of dynamic granular compaction at the mesoscale using synchrotron X-ray radiography

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A grand challenge in the field of dynamic compression is to understand how mesoscale (nanosecond-microsecond, micrometre-millimetre) deformation processes govern macroscopic material behaviour and performance. In this seminar I will discuss the development and application of a novel synchrotron X-ray radiography technique, which is able to make in situ measurements of shock-compression at the mesoscale. Focus will be given to direct measurements of granular compaction in several systems relevant to chondritic asteroid formation, including the observation of normally distributed shock velocities, measurements of shock front thickness, and calculations of spatially-resolved mass density fields.

M.E. Rutherford et al., Journal of Synchrotron Radiation 23 (2016) 685-693
M.E. Rutherford et al., Scientific Reports 7 (2017) doi: 10.1038/srep45206

This talk is part of the Surfaces, Microstructure and Fracture Group series.

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