Abstract
Porous structure is common in asteroids and satellites of outer planets. In order to study the relation between structure of the small bodies and their thermal and collisional evolution, we prepared porous sintered targets and performed impact disruption experiments using a low velocity gas gun. Projectiles were polycarbonate cylinders 1.4g in mass and the impact velocities was changed between 20 and 120m/s. Targets were made of soda lime glass beads of diameter 50 micron and density 2.5 g/cm3. We obtained targets with porosity between 30 and 45 % by changing heating temperature and duration. In our preliminary study, we found that the impact strength is higher for the targets with similar porosity but with higher compressive strength and the targets with similar strength but with higher porosity (Setoh et al. 2005). We will summarize the relation between impact strength and compressive strength for the targets with different porosity.
