Shocks produced by laser plasma can generate strong (GPa range) and short (ns range) stresses in materials. By playing on their propagations, it can sollicitate structural assembly interfaces for example. This issue is important since it concerns the detection of weakbond. Since several years, we have been interested in the development of this technique by addressing all technical and scientific issues. This presentation will share the latest scientific and technical advances concluded by demonstrations on representative parts. It will also discuss futures issues that remain to be developed to reach maturity for the industrialization of the process.
we present a numerical and experimental study on the characterization of the temporal ablation pressure due to a laser with and without a confinement layer on aluminum target. Based on velocimetry measurements, we have built a large experimental data of laser configurations varying the pulse duration, the energy and the wavelength. Then we are able to reproduce the results with a single numerical model using the lagrangian 1D ESTHER hydrocode in both regimes. Finally we use the code to propose analytical laws for temporal ablation pressure in a large interaction domain for aluminum targets.
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