Laser-Driven Materials Experiments: New Capabilities for Probing Dynamic Behavior

摘要

Accurate models of the response of materials to dynamic loading are important for simulations of the performance and safety of weapons. These models are devised using experiments in which samples are subjected to high pressures, usually from shock waves. New classes of models are being developed using the detailed underlying physics, such as dislocation dynamics, rather than ad hoc empirical relations to describe the response. Laser-driven materials experiments offer promising possibilities to contribute to model development, including convenient new diagnostics such as transient x-ray diffraction to measure response at the microstructural level. These experiments provide a bridge between single crystal and polycrystalline behavior.