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Strength of comet material and Hertzian contact-mechanics applied to the landing of Philae on comet Churyumov-Gerasimenko

Arnold, W. and Möhlmann, D. (2009) Strength of comet material and Hertzian contact-mechanics applied to the landing of Philae on comet Churyumov-Gerasimenko. Aerotecnica Missili e (&) Spazio: Journal of Aerospace Sciences, Technologies and Systems, 88 (4), pp. 145-149. ISSN 0365-7442

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Abstract

We estimate the strength of cometary material using fracture mechanics and regarding the comet material as a green "ceramic" body. The breakage strength Y is estimated using the fracture strength of ceramic slurries, so-called green bodies, and is compared to other approaches to estimate Y, and he results are applied to the break-up of comet nuclei. In a second part, we apply Hertzian contact mechanics to model the impact stress or impact force per area p0 during the landing operation of Philae. If the yield strength Y of the comet material is much less then p0, breakage will occur below the comet surface.

Item URL in elib:https://elib.dlr.de/65660/
Document Type:Article
Title:Strength of comet material and Hertzian contact-mechanics applied to the landing of Philae on comet Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Arnold, W.Physikalisches Institut, Universität GöttingenUNSPECIFIED
Möhlmann, D.dirk.moehlmann (at) dlr.deUNSPECIFIED
Date:2009
Journal or Publication Title:Aerotecnica Missili e (&) Spazio: Journal of Aerospace Sciences, Technologies and Systems
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:88
Page Range:pp. 145-149
ISSN:0365-7442
Status:Published
Keywords:comet, landing, strength, Philae, Churyumov-Gerasimenko
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Projekt ROSETTA Lander (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Pieth, Susanne
Deposited On:12 Oct 2010 14:04
Last Modified:07 Feb 2013 19:17

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