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measurement of cohesion in asteroid regolith materialsA study has been initiated to examine cohesive forces in asteroid materials to contribute to a better understanding of low density bodies such as asteroids and Phobos, and assist in exploration missions involving interaction with their surface material. The test specimen used in this study was a lightly weathered CM2 meteorite which is spectroscopically similar to Type C (carbonaceous) asteroids, and thought to have representative surface chemistry. To account for sample heterogeneity, adhesion forces were measured between the CM2 sample and its five primary mineral phase components. These adhesive forces bound the range of cohesive force that can be expected for the bulk material. All materials were characterized using a variety of optical and spectroscopic methods. Adhesive forces on the order of 50 to 400 μN were measured using a torsion balance in an ultrahigh vacuum chamber. The mineral samples exhibited clearly different adhesive strengths in the following hierarchy: Serpentine > Siderite > Bronzite > Olivine ≈ Fe-Ni.
Document ID
20170001425
Document Type
Conference Paper
Authors
Kleinhenz, Julie E.
(NASA Glenn Research Center Cleveland, OH United States)
Gaier, James R.
(NASA Glenn Research Center Cleveland, OH United States)
Waters, Deborah L.
(NASA Glenn Research Center Cleveland, OH United States)
Harvey, Ralph
(Case Western Reserve Univ. Cleveland, OH, United States)
Zeszut, Zoe
(Case Western Reserve Univ. Cleveland, OH, United States)
Carreno, Brandon
(Case Western Reserve Univ. Cleveland, OH, United States)
Shober, Patrick
(Case Western Reserve Univ. Cleveland, OH, United States)
Date Acquired
February 8, 2017
Publication Date
January 9, 2017
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
GRC-E-DAA-TN38054
Meeting Information
AIAA 2017 SciTech(Grapevine, TX)
Funding Number(s)
WBS: WBS 811073.02.14.02.93
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Asteroids
meteorites
in-situ resource utilization
regolith

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