Laser shock experiments, from research to industry via RADIOSS numerical simulation (by D. ZAGOURI, M. BOUSTIE; France)

When focusing a high power pulsed laser on absorbing materials, this irradiation results in a high pressure (>GPa), low duration (a few nanoseconds) loading applied to the material. The propagation of this highly dynamic loading can be turned also into tensile loading with controlled intensities, allowing evaluating the dynamic strength of materials or assemblies. Laser shock laboratories facilities exhibit many benefits. They can be coupled with time resolved diagnostics providing experimental data of the shock waves propagation and associated effects (damage, surface treatment, laser shock peening,-¦). One major advantage is also the
easiness of samples recovery for post mortem analysis. Direct comparisons between experiments and simulation with RADIOSS to evaluate the robustness of numerical modeling are performed, leading to the identification of material constitutive law parameters and damage modeling under extreme strain rate (above 107 s-1) for bulk materials. As an industrial application of laser shock propagation and tensile stress generation into multi-materials assemblies, SIMCHOC uses RADIOSS to promote the innovative laser adhesion test application to a wide range of stuck assemblies.