【作者简介】               

    One of the grand challenges in materials physics is dynamic responses to impulsive loading, including shock waves, radiation, and pulsed magnetic field, due to their highly transient nature and extremely complex microstructure effects. Dynamic responses, such as plasticity, damage, phase changes, and chemical reactions, are inherently multiscale and heavily dependent on microstructure. In-volume, dynamic, measurements at sub-micron scales are particularly challenging.

The transition of shock wave research from being “test-based” to “physics-based” requires concerted experimental, modeling and theoretical efforts. In this talk, we review some recent developments in the field along with my own perspectives, and present our endeavors along this line, including phase changes, plasticity, damage, instabilities, hotspot formation in energetic materials, and microstructure effects, as well as the development of synchrotron-based, ultrafast X-ray diagnostics for bulk-scale shock experiments. While significant new insights have certainly been gained into dynamic materials response, developing predictive models incorporating microstructure effects remains as a daunting task, and calls for a multiscale, multiphysics approach, which is unfortunately still in its infancy.