Notice: This seminar has been cancelled.
date: 2011 March 16 (Wed) 10:00-11:00
room: Kobe University, Science and Technology Research Building #4-809
speaker: Tatsuhiro Michikami (Fukushima National College of Technology)
organizer: Ayako Suzuki
title: A numerical model for the shape distribution of fragments
abstract: In laboratory impact experiments, the shape of fragments over a broad size range is distributed around the mean value of the axial ratio 2: sqrt(2) : 1, which is independent of a wide range of experimental conditions. The shape distributions of the boulders on asteroid Eros and the small- and fast-rotating asteroids (diameter <200 m and rotation period <1h) are similar to those of laboratory fragments (Michikami et al., 2010). In order to understand those shape distributions, a geometric approach by numerical simulation has been performed. Our model can reproduce the experimental shape distribution.