Analysis of Sample Acquisition Dynamics Using Discrete Element Method

Catanoso, Damiana; Stucky, T.; Case, Jennifer M.; Rogg, Arno

doi:10.1109/aero47225.2020.9172431

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…Whereas physics engine applications involve both individual objects and particle assemblages, DEM has primarily focused on modeling mechanical behavior of particle assemblages since it was introduced (Cundall and Strack, 1979). Modern DEM applications include particle transportation in mining (Pezo et al, 2015), particle compaction in material science (Martin et al, 2003), fertilizer spreading in agriculture (Coetzee and Lombard, 2011), soil-tool interaction (Asaf et al, 2007;Catanoso et al, 2020), particle mixer and grinder machinery (Alian et al, 2015;Cleary, 2015), rocky slopes in geoengineering (Chuhan et al, 1997), dynamic analysis of infrastructures (Çaktı et al, 2016;Mehrotra and DeJong, 2017;Papantonopoulos et al, 2002), and fault ruptures Bray, 2018, 2022;Chiama et al, 2023).…”

Section: Physics Engine Versus Discrete Element Methods (Dem)mentioning

confidence: 99%

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Chen,

Arrowsmith,

Das

et al. 2024

Seismica

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Understanding the dynamics of precariously balanced rocks (PBRs) is important for seismic hazard analysis and rockfall prediction. Utilizing a physics engine and robotic tools, we develop a virtual shake robot (VSR) to simulate the dynamics of PBRs during overturning and large-displacement processes. We present the background of physics engines and technical details of the VSR, including software architecture, mechanical structure, control system, and implementation procedures. Validation experiments show the median fragility contour from VSR simulation is within the 95% prediction intervals from previous physical experiments, when PGV/PGA is greater than 0.08 s. Using a physical mini shake robot, we validate the qualitative consistency of fragility anisotropy between the VSR and physical experiments. By overturning cuboids on flat terrain, the VSR reveals the relationship between fragility and geometric dimensions (e.g., aspect and scaling ratios). The ground motion orientation and lateral pedestal support affect PBR fragility. Large-displacement experiments estimate rock trajectories for different ground motions, which is useful for understanding the fate of toppled PBRs. Ground motions positively correlate with large displacement statistics such as mean trajectory length, mean largest velocity, and mean terminal distance. The overturning and large displacement processes of PBRs provide complementary methods of ground motion estimation.

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Section: Physics Engine Versus Discrete Element Methods (Dem)mentioning

confidence: 99%

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Chen,

Arrowsmith,

Das

et al. 2024

Seismica

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“…Particle sizes in all of the specimens ranged in radius from 12 to 18 mm, where particles from the plume are 0.6-15 μm (Southworth et al 2019). The most significant effect from using larger particles is a higher variation in surface stiffness, particularly post-breakage (Catanoso et al 2020). Because internal loads in granular materials are carried through force chains, with larger particles, these force chains are farther away from each other, leading to a lower likelihood of the footpad landing on an average grouping of these force chains.…”

Section: Generating Numerical Specimens For Modeling the Surfacementioning

confidence: 99%

“…Discrete element methods (DEMs) have been utilized for extraterrestrial ice previously, often for modeling sample acquisition (Catanoso et al 2020;Riccobono et al 2021). Extraterrestrial applications beyond ice have used DEMs as well (Karapiperis et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Predicting the Effect of Surface Properties on Enceladus for Landing

Harmon,

Cable,

Moreland

et al. 2023

Planet. Sci. J.

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The prospect of landing on the surface of Enceladus comes with the question of whether the surface conditions permit selection and certification of one or more safe landing sites in an area of high science value. On Enceladus, the search for biosignatures in plume materials is a high science value objective that correlates with proximity to the south polar terrain, where the plume deposition rate is highest; however, such areas may be unsafe if unsintered particles make the landing site unstable. To investigate this, the surface of Enceladus was modeled using the level set discrete element method. This method models the kinetics and kinematics of large groups of individual ice particles both in contact and sintered together. Using the model, a rigid footpad was initialized at a 1 m s−1 descent just above the ice surface under Enceladus gravity. Parameters studied were the sintering amount, particle size distribution, footpad geometry, and surface slope. The model predicted that some sintering is required for the surface to support a lander; however, too much sintering can cause a lander to bounce. For tests on sloped surfaces, landing could be possible on slopes as steep as 20° for certain conditions, but it is safest to land in areas with a slope angle of 15° or less. While slope angle and sintering level were much more important than footpad geometry, the hemisphere footpad had the best performance (lowest slipping) in most cases compared to the cone or disk.

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“…Despite a few other relevant research works, e.g., refs. [8][9][10][11][12] and our own recent article [13], beyond these studies, the literature on sampling system investigation using DEM remains limited.…”

Section: Introductionmentioning

confidence: 99%

The Use of DEM for Optimising an Industrial Vezin Sampler Operation

Magalhães,

Chieregati,

Ilic

et al. 2023

Minerals

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Rotary dividers, also known as “vezin samplers”, are widely used in the mining industry to obtain representative samples of particulate streams, and they are used as primary, secondary, or tertiary samplers. Based on Pierre Gy’s theory of sampling (TOS), the correct extraction of an increment when composing a sample must give all particles the same chance of being selected. Aiming to comply with the theory of sampling, sampler construction parameters must be considered to avoid increment delimitation and extraction errors (IDE and IEE). In this way, a detailed study of the ore physical properties is necessary before designing sampling systems, which are customised for each application and ore type. Based on ore characterisation studies and combined with Discrete Element Method (DEM) simulations, it is possible to evaluate samplers’ dimensions as proposed by the theory of sampling and determine the best design and operational parameters. The present study investigated and optimised the performance of a secondary vezin sampler installed in the feed sampling system of a gold plant in Brazil using DEM.

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Analysis of Sample Acquisition Dynamics Using Discrete Element Method

Cited by 5 publications

References 7 publications

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Predicting the Effect of Surface Properties on Enceladus for Landing

The Use of DEM for Optimising an Industrial Vezin Sampler Operation

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