Molecular Dynamics Study of Impact Angle Dependence of Structure of Debris Cloud under Hyper Velocity Impact
Keiko NAKATANI, Ryosuke KAYANOKI and Yoshihiko SUGIYAMA
Abstract:molecular dynamics simulation is carried out to study the fracture under hyper-velocity impact conditions when a space debris attack to a man-made satellite. In this paper, oblique-impact simulations are performed since most orbital debris impacts are oblique in the real condition. Aluminum projectile impacts aluminum target at 0-, 30-, and 45-degrees obliquity. Impact velocity is 8km/s, and target thickness - projectile diameter ratio t/D is 0.684. As the angle of obliquity is increasing, the velocity of debris after impact is decreasing , while the deviation of the line of flight is increasing. These results qualitatively agrees well with experimental results. Key Words:Computational mechanics, Molecular dynamics, Space debris, Hyper velocity impact, Debris cloud, Penetration, Oblique-impact