Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13d1706k&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P13D-1706
Physics
[5470] Planetary Sciences: Solid Surface Planets / Surface Materials And Properties
Scientific paper
The planning and completion of mobility and excavation efforts on the moon requires a thorough understanding of the planetary regolith. In this work, a discrete element method (DEM) model is created to replicate those activities in the laboratory and for planning mission activities in the future. The crux of this work is developing a particle bed that best replicates the regolith tool/wheel interaction seen in the laboratory. To do this, a DEM geotechnical triaxial strength cell was created allowing for comparison of laboratory JSC-1a triaxial tests to DEM simulated soils. This model relies on a triangular lattice membrane covered triaxial cell for determining the macroscopic properties of the modeled granular material as well as a fast and efficient contact detection algorithm for a variety of grain shapes. Multiple grain shapes with increasing complexity (ellipsoid, poly-ellipsoid and polyhedra) have been developed and tested. This comparison gives us a basis to begin scaling DEM grain size and shape to practical values for mobility and excavation modeling. Next steps include development of a DEM scoop for percussive excavation testing as well as continued analysis of rover wheel interactions using a wide assortment of grain shape and size distributions.
Hopkins Andrew M.
Knuth M. A.
No associations
LandOfFree
Discrete Element Modeling for Mobility and Excavation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Discrete Element Modeling for Mobility and Excavation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discrete Element Modeling for Mobility and Excavation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-868430