Granularity - Wikipedia

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Precision and ambiguity. Coarse-grained materials or systems have fewer, larger discrete components than fine-grained materials or systems.. A coarse-grained description of a system regards large subcomponents.; A fine-grained description regards smaller components of which the larger ones are composed.; The concepts granularity, coarseness, and fineness are relative; and are used when ...
Differences Between Coarse-Grained and Fine-Grained Soil
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Coarse-grained soils have 50% or less material passing the No. 200 sieve. Fine-grained soils have 50% or more material passing the No. 200 sieve. Engineering properties such as strength and compressibility of coarse-grained soil are governed by the grain-size of the particles and their structural arrangement.
A state-dependent bounding surface model of coarse-grained materials ...
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It should be noted that the GSD of coarse-grained materials is always changed with particle breakage. This phenomenon is unavoidable for rockfill materials when the consolidation pressure reaches 1.5 MPa, as mentioned in section 3.1. Once crushing, granular material behaviors would be dominated by not only initial GSD but also GSD evolution.
Approaches and Perspective of Coarse-Grained Modeling and Simulation ...
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In CG-MD, one or more monomers/units of the hybrid materials are represented as a coarse-grained bead capable of reproducing parts of the polymer architecture. This leads to the loss of fine-grained atomic details of the system, which are crucial for studying properties and interactions of atom-level structures, but concurrently saves a ...
COARSE-GRAINED definition | Cambridge English Dictionary
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COARSE-GRAINED meaning: 1. Coarse-grained rock, soil, paper, material, etc. is rough, or has pieces in it that are larger…. Learn more.
Coarse Grained Model - an overview | ScienceDirect Topics
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Coarse-grained models. Coarse-grained models are aimed at building simplified representations of complex systems that allow keeping the main chemical/physical peculiarities (such as the interplay between hydrophilic and hydrophobic effects) and performing affordable and meaningful simulations, which could not be feasible with, for example ...
Bottom-up Coarse-Graining: Principles and Perspectives - ACS Publications
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driving the properties of real world materials and complex systems (e.g., those found in biology, chemistry, and materials science). As a ... such as moving from an atomistic simulation to that of the resolution of large coarse-grained (CG) groups of atoms, can partially ameliorate the cost of individual simulations, the relationship between ...
Ultrafine-Grained Materials | SpringerLink
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The common grain size of the metals in the industry is >10 μm and are called coarse-grained materials [ 16 ]. Fine-grained metals that are processed using industrial thermomechanical processing have a grain size of ∼1–10 μm. It is hard to achieve a metal with grain size <1 μm (called ultrafine grained) or <100 nm (called nanograined ...
Modeling the mechanical behavior of coarse-grained soil ... - Springer
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Systematic investigation of the effects of individual particle properties, such as shape, size, surface roughness, and constituent materials stiffness, on the behavior of coarse-grained soils requires careful control over the other particle properties. Achieving this control is a pervasive challenge in investigations with naturally occurring soils. The rapid advance of modern additive ...
(PDF) Geotechnical Characterisation of Coarse-Grained ... - ResearchGate
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Coarse-grained materials in engineering projects can . contain pa rticle sizes greater th an 175 mm. Approaches . for evaluating the shear strength and behaviour of coarse-
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Effects of coarse-grained material on hydraulic properties and shear ...
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The low permeability of the top soil will cause the area around sidewalks to have poor drainage. The water clogged in the soil reduces its shear strength and consequently induces sidewalk damage. In order to improve permeability and shear strength, top soil can be mixed with a coarse-grained material, such as granite chips.
Uncertainty driven active learning of coarse grained free ... - Nature
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Top-down coarse grained force fields are well established with widespread use across different applications 3,4,12,13,14,15,16,17,18,20,21, while the development of bottom-up coarse grained models ...
Mechanical Modeling of Frozen Coarse-Grained Materials ... - Hindawi
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In the cold regions of China, coarse-grained materials are frequently encountered or used as backfilling materials in infrastructure construction, such as dams, highways, railways, and mineral engineering structures. Effects of confining pressure (0.2, 0.5, and 1 MPa) and frozen temperature (−2, −5, −10, and −15&#xb0;C) on the stress-strain response and elastic modulus were ...
Energy renormalization for coarse-graining polymers having ... - Science
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Polymer glass-forming (GF) materials exhibit complex dynamic and mechanical properties that strongly depend on temperature due to the glass transition (), and assessing these properties using all-atomistic (AA) molecular dynamics (MD) simulations is inherently challenging because of their limitations of accessing extended time and length scales.. Multiscale modeling, such as coarse-grained (CG ...
Coarse-graining strategies for predicting properties of ... - Springer
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The ability of atomistic and coarse-grained models to discern between two polymers of very similar architecture is examined. To this end, polyether ether ketone (PEEK) and polyether ketone ketone (PEKK) are chosen. The difference in glass transition temperature and the similarity in compressive responses of the two polymers are captured by all-atom models. A coarse-graining scheme, with 6 ...
Constitutive Modeling of Coarse-Grained Materials Incorporating the ...
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Coarse-grained materials (CGMs), including gravel, ballast, and rockfill material, exhibit a complicated stress-strain-volume change behavior, which is state dependent and influenced by considerable particle breakage even under relatively low pressure. A generalized plasticity model with a multiaxial formulation is developed for CGMs based on ...
Evaluation of Essential Dynamics and Fixed-Length Coarse Graining for ...
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For multiscale modeling of biomolecules, reliable coarse-grained (CG) models can offer great potential to simulate larger temporal and spatial scales than traditional all-atom (AA) models. In this study, we explore the essential dynamics coarse graining (EDCG) and fixed-length coarse graining (FLCG) approaches for constructing highly coarse-grained models for multidomain proteins (MDPs), with ...
Coarse‐grained methods for polymeric materials: enthalpy‐ and entropy ...
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Coarse-grained methods for polymeric materials: enthalpy- and entropy-driven models. Paola Carbone, Corresponding Author. ... Because of the large conformational space that needs to be sampled when simulating polymers, coarse-grained (CG) models are commonly used and depending on which part of the system free energy (enthalpy, entropy, or both ...
Ultrasonic signal enhancement for coarse grain materials by machine ...
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1. Introduction. It is well-recognized that the coarse grained materials, such as austenitic stainless steel, present high attenuation and scattering of ultrasonic wave due to the presence of lots of grain boundaries inside this kind of materials [1].When a coarse-grained material is detected by ultrasonic testing (UT), flaw echoes will probably be submerged in noise background resulting from ...
Constitutive Modeling of Coarse-Grained Materials Incorporating the ...
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AbstractCoarse-grained materials (CGMs), including gravel, ballast, and rockfill material, exhibit a complicated stress-strain-volume change behavior, which is state dependent and influenced by considerable particle breakage even under relatively low pressure. A generalized plasticity model with a multiaxial formulation is developed for CGMs based on the critical state concept. The effect of ...

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