A physically consistent Discrete Element Method for arbitrary shapes using Volume-interacting Level Sets

Haven, Dingeman L.H. van der; Fragkopoulos, Ioannis S.; Elliott, James A.

doi:10.1016/j.cma.2023.116165

Cited by 8 publications

(1 citation statement)

References 50 publications

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“…However, a significant knowledge gap exists regarding the load-bearing capacity of irregularly shaped, randomly distributed pebble aggregates in arrester beds, which directly influences the safety performance of trucks navigating through these beds. Advancements in computational technology have significantly enhanced the recognition of the discrete element method (DEM) as an exceptionally effective approach for investigating interaction mechanisms within pebble aggregates [5]. The DEM leverages Newtonian mechanics to analyse the contact forces amongst these elements by representing particles as discrete entities, offering a detailed perspective at the particle level.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Load-Bearing Capacity of Pebble Aggregates

Liu,

Bai,

Liu

2024

Applied Sciences

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The load-bearing capacity of pebble aggregates plays a pivotal role in influencing the operational performance of uncontrolled trucks on arrester beds. The complexity of this phenomenon stems from the nonuniformity in the shapes of the pebbles and their stochastic arrangement within the beds, presenting notable challenges for traditional mathematical modelling techniques in precisely evaluating the contact dynamics of these aggregates. This study leverages the discrete element method (DEM) to extensively analyse the arrester bed aggregate of a standard truck escape ramp. The aforementioned mechanism entails the gathering of morphological parameters of irregularly shaped aggregate particles and introduces a novel method for constructing random shapes that adhere to the observed distribution characteristics. A discrete element model, grounded in the physical properties of these aggregates, is formulated. This study focuses on the aggregate’s load-bearing capabilities, scrutinising the mechanical behaviour of the aggregate particles at the macroscopic and microscopic scales. These insights offer substantial scientific contributions and practical implications for assessing the safety of escape ramps and determining essential parameters for the brake bed design.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Load-Bearing Capacity of Pebble Aggregates

Liu,

Bai,

Liu

2024

Applied Sciences

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A discretization‐convergent level‐set‐discrete‐element‐method using a continuum‐based contact formulation

Feldfogel,

Karapiperis,

Andrade

et al. 2023

Numerical Meth Engineering

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The level‐set‐discrete‐element‐method (LS‐DEM) was developed to overcome the shape limitation of traditional discrete element method. LS‐DEM's shape generality relies on a node‐based surface discretization of grain boundary, and it has been used to shed new light of a variety of granular mechanics applications with realistically shaped grains and structural assemblies made of unbonded building blocks. Due to the node‐based discretization of grain boundary, the original LS‐DEM is discretization‐sensitive and it suffers from divergence of the response with discretization refinement, particularly for highly compressible problems. Previous studies have identified and addressed this issue in different ways, each with its own advantages and shortcomings. Here, we propose a methodologically‐rigorous and computationally‐efficient adapted formulation which solves LS‐DEM's discretization‐sensitivity issue. It adopts the classical contact description of continuum mechanics, wherein the contact interactions are traction‐based. We demonstrate the convergence of the adapted LS‐DEM in several highly compressible cases studies, show that it is key to correctly capturing the mechanical response, and compare it to alternative formulations.

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An efficient Cartesian mesh generation strategy for complex geometries

Li,

Yang,

et al. 2024

Computer Methods in Applied Mechanics and Engineering

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A physically consistent Discrete Element Method for arbitrary shapes using Volume-interacting Level Sets

Cited by 8 publications

References 50 publications

Analysis of the Load-Bearing Capacity of Pebble Aggregates

Analysis of the Load-Bearing Capacity of Pebble Aggregates

A discretization‐convergent level‐set‐discrete‐element‐method using a continuum‐based contact formulation

An efficient Cartesian mesh generation strategy for complex geometries

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