Publication:
SPH calculations of asteroid disruptions: The role of pressure dependent failure models

cris.virtual.author-orcid0000-0002-1800-2974
cris.virtualsource.author-orcid64722da9-fb62-4562-ad37-6a89c826f25a
dc.contributor.authorJutzi, Martin
dc.date.accessioned2024-12-13T15:37:01Z
dc.date.available2024-12-13T15:37:01Z
dc.date.issued2015
dc.description.abstractWe present recent improvements of the modeling of the disruption of strength dominated bodies using the Smooth Particle Hydrodynamics (SPH) technique. The improvements include an updated strength model and a friction model, which are successfully tested by a comparison with laboratory experiments. In the modeling of catastrophic disruptions of asteroids, a comparison between old and new strength models shows no significant deviation in the case of targets which are initially non-porous, fully intact and have a homogeneous structure (such as the targets used in the study by Benz and Asphaug, 1999). However, for many cases (e.g. initially partly or fully damaged targets and rubble-pile structures) we find that it is crucial that friction is taken into account and the material has a pressure dependent shear strength. Our investigations of the catastrophic disruption threshold (27, as a function of target properties and target sizes up to a few 100 km show that a fully damaged target modeled without friction has a Q(D)*:, which is significantly (5-10 times) smaller than in the case where friction is included. When the effect of the energy dissipation due to compaction (pore crushing) is taken into account as well, the targets become even stronger (Q(D)*; is increased by a factor of 2-3). On the other hand, cohesion is found to have an negligible effect at large scales and is only important at scales less than or similar to 1 km. Our results show the relative effects of strength, friction and porosity on the outcome of collisions among small (less than or similar to 1000 km) bodies. These results will be used in a future study to improve existing scaling laws for the outcome of collisions (e.g. Leinhardt and Stewart, 2012). (C) 2014 Elsevier Ltd. All rights reserved.
dc.description.numberOfPages7
dc.description.sponsorshipPhysikalisches Institut, Weltraumforschung und Planetologie (WP)
dc.identifier.arxiv1502.01860v1
dc.identifier.doi10.7892/boris.81930
dc.identifier.isi000352674700002
dc.identifier.publisherDOI10.1016/j.pss.2014.09.012
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/192699
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPlanetary and space science
dc.relation.issn0032-0633
dc.relation.organizationDCD5A442BE9BE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::520 - Astronomy
dc.subject.ddc500 - Science::530 - Physics
dc.titleSPH calculations of asteroid disruptions: The role of pressure dependent failure models
dc.typearticle
dspace.entity.typePublication
dspace.file.typetext
dspace.file.typetext
oaire.citation.endPage9
oaire.citation.startPage3
oaire.citation.volume107
oairecerif.author.affiliationPhysikalisches Institut, Weltraumforschung und Planetologie (WP)
unibe.contributor.rolecreator
unibe.description.ispublishedpub
unibe.eprints.legacyId81930
unibe.journal.abbrevTitlePLANET SPACE SCI
unibe.refereedTRUE
unibe.subtype.articlejournal

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