MICRO SCALE IMPACTS CRATERS: ANALYSIS OF MORPHOLOGY, SPUTTERING AND ENERGY

PLANES, MARIA BELEN; MILLÁN, EMMANUEL; BRINGA, EDUARDO

Montevideo

Congreso; Asteroids, comets, meteors 2017; 2017

ACM

In the recent past, other research on impact on materials has been carried out, with a greater emphasis on non-cohesive targets such as dry sands [1], leaving impacts on adhesive materials in the background. This project implements computer simulations to recreate impacts of multigrain porous  silica projectiles on surfaces of the same characteristics. Investigations of this type [2][3] are  relevant to several disciplines, one of the most important is astrophysics, since the  universe contains a high percentage of dust grains that form, for example, interstellar dust  clouds, planetary rings, etc. Cratering by the impact of projectiles such as meteorites and  dust particles are also interesting from a study of surfaces of nanostructures.  In this study the craters formed by the impact of projectiles in varying size and initial  velocity are studied. The implemented model includes repulsive and adhesion forces, and  dissipative ones as bearing and friction.   In this context we are going to investigate whether the current models for impact craters  are valid on the micro scale [4]The results of variations such as depth, size, volume, with respect to the number of grains that make up the projectile and the initial velocity of the projectile will be exposed.  Sputtering and energy variation over time will also be shown