Abstract
The increase in the number of debris in orbit and the increase in the number of nano satellites in orbit leads to the need to better understand the debris likely to be generated by these nano satellites: either by explosion from an internal energy source, or by explosion following an impact by a large external debris. The aim of this research is to explore innovative fragmentation modelling solutions implemented in Impetus Afea Solver in the context of hypervelocity impacts of debris. Thus, through this work, a complete and detailed study of complex structures under hypervelocity impacts is successfully performed with the γ-SPH-ALE Solver. Thanks to its robustness and accuracy, Impetus can properly reproduce the experimental results. Particularly, the influence of the impact velocity on the multi-impact and perforation of a secondary plate is correctly handled as well as the behavior of a complete nanosatellite structure. The combination with an efficient fragment detection algorithm makes it possible to perform an accurate fragment analysis on the fly, and to exploit the data with in-house codes. In addition, the benefit from GPU acceleration significantly reduces the computation times with respect to classical SPH approaches allowing to meet industrial needs and to consider real orbital structures.
