Scale-dependent measurements of meteorite strength

Implications for asteroid fragmentation

Desireé Cotto-Figueroa, Erik Asphaug, Laurence Garvie, Ashwin Rai, Joel Johnston, Luke Borkowski, Siddhant Datta, Aditi Chattopadhyay, Melissa A. Morris

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Measuring the strengths of asteroidal materials is important for developing mitigation strategies for potential Earth impactors and for understanding properties of in situ materials on asteroids during human and robotic exploration. Studies of asteroid disruption and fragmentation have typically used the strengths determined from terrestrial analog materials, although questions have been raised regarding the suitability of these materials. The few published measurements of meteorite strength are typically significantly greater than those estimated from the stratospheric breakup of meter-sized meteoroids. Given the paucity of relevant strength data, the scale-varying strength properties of meteoritic and asteroidal materials are poorly constrained. Based on our uniaxial failure studies of centimeter-sized cubes of a carbonaceous and ordinary chondrite, we develop the first Weibull failure distribution analysis of meteorites. This Weibull distribution projected to meter scales, overlaps the strengths determined from asteroidal airbursts and can be used to predict properties of to the 100. m scale. In addition, our analysis shows that meter-scale boulders on asteroids are significantly weaker than small pieces of meteorites, while large meteorites surviving on Earth are selected by attrition. Further, the common use of terrestrial analog materials to predict scale-dependent strength properties significantly overestimates the strength of meter-sized asteroidal materials and therefore is unlikely well suited for the modeling of asteroid disruption and fragmentation. Given the strength scale-dependence determined for carbonaceous and ordinary chondrite meteorites, our results suggest that boulders of similar composition on asteroids will have compressive strengths significantly less than typical terrestrial rocks.

Original languageEnglish (US)
Pages (from-to)73-77
Number of pages5
JournalIcarus
Volume277
DOIs
StatePublished - Oct 1 2016

Fingerprint

meteorites
asteroids
asteroid
meteorite
fragmentation
ordinary chondrite
carbonaceous chondrite
carbonaceous chondrites
chondrites
robotics
analogs
compressive strength
comminution
impactors
material
meteoroids
mitigation
mechanical properties
rocks
rock

Keywords

  • Asteroids
  • Experimental techniques
  • Meteorites
  • Near-Earth objects

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Cotto-Figueroa, D., Asphaug, E., Garvie, L., Rai, A., Johnston, J., Borkowski, L., ... Morris, M. A. (2016). Scale-dependent measurements of meteorite strength: Implications for asteroid fragmentation. Icarus, 277, 73-77. https://doi.org/10.1016/j.icarus.2016.05.003

Scale-dependent measurements of meteorite strength : Implications for asteroid fragmentation. / Cotto-Figueroa, Desireé; Asphaug, Erik; Garvie, Laurence; Rai, Ashwin; Johnston, Joel; Borkowski, Luke; Datta, Siddhant; Chattopadhyay, Aditi; Morris, Melissa A.

In: Icarus, Vol. 277, 01.10.2016, p. 73-77.

Research output: Contribution to journalArticle

Cotto-Figueroa, D, Asphaug, E, Garvie, L, Rai, A, Johnston, J, Borkowski, L, Datta, S, Chattopadhyay, A & Morris, MA 2016, 'Scale-dependent measurements of meteorite strength: Implications for asteroid fragmentation', Icarus, vol. 277, pp. 73-77. https://doi.org/10.1016/j.icarus.2016.05.003
Cotto-Figueroa, Desireé ; Asphaug, Erik ; Garvie, Laurence ; Rai, Ashwin ; Johnston, Joel ; Borkowski, Luke ; Datta, Siddhant ; Chattopadhyay, Aditi ; Morris, Melissa A. / Scale-dependent measurements of meteorite strength : Implications for asteroid fragmentation. In: Icarus. 2016 ; Vol. 277. pp. 73-77.
@article{ecefee7a19804fe38f1dfe06d991215a,
title = "Scale-dependent measurements of meteorite strength: Implications for asteroid fragmentation",
abstract = "Measuring the strengths of asteroidal materials is important for developing mitigation strategies for potential Earth impactors and for understanding properties of in situ materials on asteroids during human and robotic exploration. Studies of asteroid disruption and fragmentation have typically used the strengths determined from terrestrial analog materials, although questions have been raised regarding the suitability of these materials. The few published measurements of meteorite strength are typically significantly greater than those estimated from the stratospheric breakup of meter-sized meteoroids. Given the paucity of relevant strength data, the scale-varying strength properties of meteoritic and asteroidal materials are poorly constrained. Based on our uniaxial failure studies of centimeter-sized cubes of a carbonaceous and ordinary chondrite, we develop the first Weibull failure distribution analysis of meteorites. This Weibull distribution projected to meter scales, overlaps the strengths determined from asteroidal airbursts and can be used to predict properties of to the 100. m scale. In addition, our analysis shows that meter-scale boulders on asteroids are significantly weaker than small pieces of meteorites, while large meteorites surviving on Earth are selected by attrition. Further, the common use of terrestrial analog materials to predict scale-dependent strength properties significantly overestimates the strength of meter-sized asteroidal materials and therefore is unlikely well suited for the modeling of asteroid disruption and fragmentation. Given the strength scale-dependence determined for carbonaceous and ordinary chondrite meteorites, our results suggest that boulders of similar composition on asteroids will have compressive strengths significantly less than typical terrestrial rocks.",
keywords = "Asteroids, Experimental techniques, Meteorites, Near-Earth objects",
author = "Desire{\'e} Cotto-Figueroa and Erik Asphaug and Laurence Garvie and Ashwin Rai and Joel Johnston and Luke Borkowski and Siddhant Datta and Aditi Chattopadhyay and Morris, {Melissa A.}",
year = "2016",
month = "10",
day = "1",
doi = "10.1016/j.icarus.2016.05.003",
language = "English (US)",
volume = "277",
pages = "73--77",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Scale-dependent measurements of meteorite strength

T2 - Implications for asteroid fragmentation

AU - Cotto-Figueroa, Desireé

AU - Asphaug, Erik

AU - Garvie, Laurence

AU - Rai, Ashwin

AU - Johnston, Joel

AU - Borkowski, Luke

AU - Datta, Siddhant

AU - Chattopadhyay, Aditi

AU - Morris, Melissa A.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Measuring the strengths of asteroidal materials is important for developing mitigation strategies for potential Earth impactors and for understanding properties of in situ materials on asteroids during human and robotic exploration. Studies of asteroid disruption and fragmentation have typically used the strengths determined from terrestrial analog materials, although questions have been raised regarding the suitability of these materials. The few published measurements of meteorite strength are typically significantly greater than those estimated from the stratospheric breakup of meter-sized meteoroids. Given the paucity of relevant strength data, the scale-varying strength properties of meteoritic and asteroidal materials are poorly constrained. Based on our uniaxial failure studies of centimeter-sized cubes of a carbonaceous and ordinary chondrite, we develop the first Weibull failure distribution analysis of meteorites. This Weibull distribution projected to meter scales, overlaps the strengths determined from asteroidal airbursts and can be used to predict properties of to the 100. m scale. In addition, our analysis shows that meter-scale boulders on asteroids are significantly weaker than small pieces of meteorites, while large meteorites surviving on Earth are selected by attrition. Further, the common use of terrestrial analog materials to predict scale-dependent strength properties significantly overestimates the strength of meter-sized asteroidal materials and therefore is unlikely well suited for the modeling of asteroid disruption and fragmentation. Given the strength scale-dependence determined for carbonaceous and ordinary chondrite meteorites, our results suggest that boulders of similar composition on asteroids will have compressive strengths significantly less than typical terrestrial rocks.

AB - Measuring the strengths of asteroidal materials is important for developing mitigation strategies for potential Earth impactors and for understanding properties of in situ materials on asteroids during human and robotic exploration. Studies of asteroid disruption and fragmentation have typically used the strengths determined from terrestrial analog materials, although questions have been raised regarding the suitability of these materials. The few published measurements of meteorite strength are typically significantly greater than those estimated from the stratospheric breakup of meter-sized meteoroids. Given the paucity of relevant strength data, the scale-varying strength properties of meteoritic and asteroidal materials are poorly constrained. Based on our uniaxial failure studies of centimeter-sized cubes of a carbonaceous and ordinary chondrite, we develop the first Weibull failure distribution analysis of meteorites. This Weibull distribution projected to meter scales, overlaps the strengths determined from asteroidal airbursts and can be used to predict properties of to the 100. m scale. In addition, our analysis shows that meter-scale boulders on asteroids are significantly weaker than small pieces of meteorites, while large meteorites surviving on Earth are selected by attrition. Further, the common use of terrestrial analog materials to predict scale-dependent strength properties significantly overestimates the strength of meter-sized asteroidal materials and therefore is unlikely well suited for the modeling of asteroid disruption and fragmentation. Given the strength scale-dependence determined for carbonaceous and ordinary chondrite meteorites, our results suggest that boulders of similar composition on asteroids will have compressive strengths significantly less than typical terrestrial rocks.

KW - Asteroids

KW - Experimental techniques

KW - Meteorites

KW - Near-Earth objects

UR - http://www.scopus.com/inward/record.url?scp=84968903134&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84968903134&partnerID=8YFLogxK

U2 - 10.1016/j.icarus.2016.05.003

DO - 10.1016/j.icarus.2016.05.003

M3 - Article

VL - 277

SP - 73

EP - 77

JO - Icarus

JF - Icarus

SN - 0019-1035

ER -