Crustal strength of different model comet materials

Details Crustal strength of different model comet materials Crustal strength of different model comet materials

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.302..115k&link_type=abstract

In ESA, Physics and Mechanics of Cometary Materials p 115-119 (SEE N90-19989 12-90)

Physics

1

Analogs, Comets, Crusts, Hardness, Physical Chemistry, Comet Nuclei, Ice, Insolation, Simulation, Sintering

Scientific paper

In the context of comet simulation experiments the physical differentation of icy analogs is investigated. During and after the artificial insolation the hardness of the samples is measured as a function of depth. The simple experimental set-up elucidates for the first time the effect of insolation on the mechanical properties of fluffy ice-dust mixtures. Starting from a fluffy ice-mineral mixture of low density, a remarkable hardening of the sample is observed within distinct layers. These layers are inhomogeneous in thickness and hardness. The variation of hardness with depth is attributed to the crustal formation by sintering. It can be explained qualitatively by models of crust formation via sublimation, diffusion and condensation of volatiles. During typical experiments the hardness increases by a factor of 5 to 10.

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