Geotechnical Properties of Asteroids Affecting Surface Operations, Mining, and In Situ Resource Utilization Activities

Zacny, K.; Bierhaus, E. B.; Britt, D. T.; Clark, B. C.; Hartzell, C. M.; Gertsch, Leslie S.; Kulchitsky, A. V.; Johnson, Jerome Β.; Metzger, Philip T.; Reeves, David M.; Sánchez, Paul; Scheeres, Daniel J.

doi:10.1016/b978-0-12-813325-5.00008-2

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…One common objective in all these missions is the return of a sample of the particles on their surfaces for analysis. For the last two, the use of numerical methods to simulate the interaction of the spacecrafts with the asteroid surfaces has been a very important part of the research efforts [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Based on a Smooth DEM formalism, the code developed by the authors has been used to study the rotational evolution of asteroids, internal structure and strength of small asteroids, binary asteroid and asteroid pair formation, and penetrometry in the asteroid environment [31,32,33,34,35,36,37]. This last point was largely applied to the simulation of the Touch-and-Go Sample Acquisition Mechanism (TAGSAM) for the OSIRIS-REx mission [6]. Note that a SSDEM version has been available in the PKDgrav code mentioned previously since 2012 [38].…”

Section: Introductionmentioning

confidence: 99%

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A contact dynamics code implementation for the simulation of asteroid evolution and regolith in the asteroid environment

Sánchez

Renouf

Azéma

et al. 2021

Icarus

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Over the last decades, simulations by discrete elements methods (DEM) have proven to be a reliable analysis tool in various domains of science and engineering. By providing access to the local physical mechanisms, DEM allows the exploration of microscopic based phenomena related to particles properties and interactions in various conditions and to revisit constitutive equations consequently. The growing computer power and memory now allow us to handle large collections of grains of various shapes and sizes by DEM simulations and in particular, it offers new perspectives in the exploration of the behavior of asteroids seen as self-gravitating and cohesive granular aggregates. In this paper we describe the Contact Dynamics (CD) method, a class of DEM based on non-smooth mechanics, and its implementation in the open-source software LMGC90. In contrast to more classical approach, Hard-and Soft-Sphere DEM, the CD method is based on an implicit time integration of the equations of motion and on a non-regularized formulation of mutual exclusion between particles. This numerical strategy is particularly relevant to the study of dense granular assemblies (even of large size) because it does not introduce numerical artefacts due to contact stiffness. So that it can be used for Small Body research, we implement a parallelised kd-tree and monitor the performance of the code as it simulates a number of granular systems. We provide examples of the simulation of the accretion of self-gravitating aggregates as well as their rotational disruption. We use the routines at our disposal in the code to monitor their behaviour through the entire evolution and find agreement with previous research.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A contact dynamics code implementation for the simulation of asteroid evolution and regolith in the asteroid environment

Sánchez

Renouf

Azéma

et al. 2021

Icarus

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Section: Introductionmentioning

confidence: 99%

LMGC90: a Contact Dynamics open source code for the simulation of granular asteroid with realistic regolith shapes. Application to the accretion process

et al. 2021

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Granular asteroids are naturally occurring gravitational aggregates (rubble piles) bound together by gravitational forces. For this reason, it is reasonable to use the theoretical concepts and numerical tools developed for granular media to study them. In this paper, we extend the field of applicability of the Contact Dynamic (CD) method, a class of non smooth discrete element approach, for the simulation of three dimensional granular asteroids. The CD method is particularly relevant to address the study of dense granular assemblies of a large number of particles of complex shape and broad particles size distribution, since it does not introduces numerical artefacts due to contact stiffness. We describe how the open source software LMGC90, interfaced with an external library for the calculation of self-gravity, is used to model the accretion process of spherical and irregular polyhedral particles.

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Investigation on the ultimate uplift capacity for asteroid exploration in drilling anchoring process: Numerical modelling and DEM simulation

Tang

Quan

et al. 2021

Advances in Space Research

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Geotechnical Properties of Asteroids Affecting Surface Operations, Mining, and In Situ Resource Utilization Activities

Cited by 6 publications

References 40 publications

A contact dynamics code implementation for the simulation of asteroid evolution and regolith in the asteroid environment

A contact dynamics code implementation for the simulation of asteroid evolution and regolith in the asteroid environment

LMGC90: a Contact Dynamics open source code for the simulation of granular asteroid with realistic regolith shapes. Application to the accretion process

Investigation on the ultimate uplift capacity for asteroid exploration in drilling anchoring process: Numerical modelling and DEM simulation

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