Physics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302..141j&link_type=abstract
In ESA, Physics and Mechanics of Cometary Materials p 141-146 (SEE N90-19989 12-90)
Physics
Axial Compression Loads, Comet Nuclei, Compressive Strength, Core Sampling, Drills, Modulus Of Elasticity, Equipment Specifications, European Space Programs, Precipitation Hardening, Stratigraphy, Stress-Strain Diagrams, Temperature Effects
Scientific paper
Material properties such as uniaxial compressive strength and Young's modulus of elasticity of the comet nucleus material are investigated for the design of drills, shovels and other instruments for acquisition systems of comet nucleus samples to be used in the ESA Rosetta comet nucleus sample return mission. Different ice-dust mixtures with contents of solid material between 1 and 20 percent by weight as synthetic comet nucleus materials were prepared. Cylindrical samples of these materials with average densities in the range of 0.5 to 0.8 g/cu cm were produced by densification. These samples were used for uniaxial compression tests at temperatures of 253, 233, and 123 K, to determine the compressive strength and the Young's modulus. The stress-strain curves showed a difference in behavior depending on test temperature and material. Further tests and investigation of the effects of age hardening are advised.
Jessberger H. L.
Kotthaus M.
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