Rotational Reshaping and Yield Stress of Rubble-Pile Asteroids

摘要: Sanchez(Diego.Sanchez − lana@colorado.edu), Daniel J. Scheeres, CCAR, University of Colorado, Boulder, USA. Using a Soft-Sphere DEM code we simulate the reshaping and disruption self-gravitating 3D granular aggregate by increasing its spin rate. During process, monitor evolution internal stresses in to find yield stress using Von Mises Maximum Stress criteria. In simulations either increase number particles or their density total mass an increment stress. addition, once rate (density dependent) has been reached, further causes reshape (ultimately fission) decrease itself.