Publication Date:
2019-07-13
Description:
The force required to pull 7t and 40t polyhedral boulders from the surface of an asteroid is simulated using the discrete element method considering the effects of microgravity, regolith cohesion and boulder acceleration. The connection between particle surface energy and regolith cohesion is estimated by simulating a cohesion sample tearing test. An optimal constant acceleration is found where the peak net force from inertia and cohesion is a minimum. Peak pulling forces can be further reduced by using linear and quadratic acceleration functions with up to a 40% reduction in force for quadratic acceleration.
Keywords:
Space Sciences (General)
Type:
NF1676L-18557
,
ASCE International Conference on Engineering, Science, Construction and Operations in Challenging Environments; Oct 27, 2014 - Oct 29, 2014; St. Louis, MO; United States
Format:
application/pdf
