Mesh-less modelling of dynamic behaviour of glasses under intense shock loadings: application to matter ejection during high velocity impacts on thin brittle targets

The purpose of this study is to present a new material model adapted to SPH (smoothed particle hydrodynamics) modelling of dynamic behaviour of glasses under shock loadings. This model has the ability to reproduce fragmentation and densification of glasses under compression as well as brittle tensile failure. It has been implemented in Ls-Dyna software and coupled with a SPH code. By comparison with experimental data the model has been validated for fused silica and pyrex glass for stress level up to 35 GPa. For Laser Megajoule (LMJ) applications, the present material model was applied to 3-dimensional high velocity impacts on thin brittle targets and has showed good agreement with experimental data obtained using double stage light gas gun in term of damages and matter ejection. (authors)