Simulation of laser-driven cratering experiments on aluminum

Bertrand Aubert, David Hebert, Jean-Luc Rullier, Emilien Lescoute, Laurent Videau, Laurent Berthe
2019 Journal of laser applications  
is an open access repository that collects the work of Arts et Métiers Institute of Technology researchers and makes it freely available over the web where possible. This is an author-deposited version published in: Handle ID ABSTRACT After a brief description of the physical principles involved in the cratering process, the authors present a specific methodology to simulate laser-driven cratering experiments performed with a long pulse duration (100 ns) and a small focal
more » ... ot diameter (220 μm). This methodology can be divided into two steps. First, the 2D-axisymmetrical pressure field generated by the laser on the target is determined from laser parameters. Second, this pressure is applied on the surface of the target in a Eulerian simulation. In order to validate this methodology, the authors simulate a laser shot on a thin aluminum target whose rear surface velocity is recorded by a VISAR (Velocity Interferometer System for Any Reflector). Once validated, they use the methodology to simulate laser-driven cratering experiments on semi-infinite aluminum targets. Numerical results are compared to experimental measurements of the craters. Although slight differences are pointed out and discussed, the proposed methodology is well adapted to simulate craterization laser shots.
doi:10.2351/1.5086736 fatcat:k43lj5nbrzc6jnetkul55bs6ka