Dependency of single-particle crushing patterns on discretization using peridynamics

Wan, Ji; Chen, Zhuang; Chu, Xihua; Liu, Hui

doi:10.1016/j.powtec.2020.03.021

Cited by 22 publications

(4 citation statements)

References 30 publications

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“…It can be observed that when the coupling number vanishes, equation ( 23) is degenerated to the μ(I) rheology law depicted by classical fluid. The friction coefficient μ(I) states a function as (26) Compared with equation ( 21), the expression of the generalized equivalent strain rate defined in equation ( 24) is different. The asymmetry part is omitted because, in the equivalent plasticity flow definition, the asymmetry part is not included, according to [45].…”

Section: Micropolar Fluid Model For Granular Flowmentioning

confidence: 99%

Dense Granular Flow Described by Micropolar Fluid and Its Peridynamic Implementation

Wan,

Qu,

Chu

2024

Preprint

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This work presents a nonlocal mesh-free peridynamic model for micropolar fluids that describe fluids enriched with the micro-rotational and length scale effects. The stabilized force state is applied to remedy the zero-energy mode instability in the micropolar viscous term. The present model is validated with the planar Couette flow and Poiseuille flow simulation. Considering the natural inheritance of micro-spinning and microstructures in granular flows, the peridynamic micropolar fluid model is also applied to simulate the dense, dry granular flow with a modified µ(I) rheology flow law. The effects of the coupling number, the micro-inertia, and the characteristic length on the granular µ(I) flow are discussed in a two-dimensional column collapse example. The numerical results of column collapse show that the micropolar coupling number can significantly affect column collapse behavior. A larger coupling number can slow down the translational movement of the granular flow, resulting in a larger angle of repose. The micro-rotational velocity increases by enlarging the coupling number. The micro-inertia and characteristic length have a significant influence on the micro-rotational behavior of the granular flow. Increasing either micro-inertia or characteristic length value decreases the micro-rotational velocity. However, the characteristic length and micro-inertia have an insignificant influence on the translational behavior. Slight differences are observed in the translational velocity distribution or free surface profile.

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Section: Micropolar Fluid Model For Granular Flowmentioning

confidence: 99%

Dense Granular Flow Described by Micropolar Fluid and Its Peridynamic Implementation

Wan,

Qu,

Chu

2024

Preprint

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“…In field of geotechnical and civil engineering, a variety of numerical simulation methods have been developed for the material damage. The simulation methods include Finite Element Method (FEM) (Turner et al, 2019;Zhou et al, 2021a) Extended Finite Element Method (XFEM) (Seyyedan et al, 2021;Zhou et al, 2021b), Peridynamics (PD) (Wang et al, 2016(Wang et al, , 2018Wan et al, 2020;Zhang et al, 2021), General Particle Dynamics (GPD) (Zhou et al, 2014), cluster method based on Discrete Element Method (DEM) (Cil and Alshibli, 2014;Sun et al, 2018;Jarrar et al, 2020) and particle replacement method based on DEM (De Bono and Mcdowell, 2016;Zheng and Tannant, 2019;. FEM, XFEM, FD, GPD and cluster method can accurately simulate the breakage process and have a good application in the simulation of rock, single particle or a small number of particles.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage

et al. 2023

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Mechanical compaction is an important diagenetic process in sandstone reservoirs. Particle breakage, which commonly occurs during mechanical compaction, plays a significant role in controlling the physical properties of the reservoir. However, existing numerical simulation methods have limitations in simulating mechanical compaction when considering particle breakage. In this study, a discrete element simulation method of mechanical compaction was proposed based on particle cutting, and the experimental results reported in the literature were used to calibrate the simulation parameters. Finally, this method was applied to the simulation of the mechanical compaction of sandstone to analyze the pore evolution process. The results show that the new simulation method has high computational efficiency and can reflect the process of particle breakage. The simulation results coincide well with the experimental results. In the simulated mechanical compacted process of coarse sandstone, particle breakage is strong in the high-stress stage with a vertical stress of 30 MPa–50 MPa. The porosity and mean radii of pores and throats decreased rapidly, and the number of pores and throats increased rapidly in the high-stress stage. When the vertical stress reached 50 MPa, compared to the simulation results without considering particle breakage, the porosity difference rate caused by particle breakage was 4.63%; the radius difference rates of pores and throats were 2.78% and 6.8%, and the number difference rates of pores and throats were 4.95% and 8.74%, respectively. In the process of mechanical compaction, the pore evolution of the reservoir is controlled by the filling of the pre-existing pore space by the fragments generated through particle breakage and the generation of microfractures. Additionally, the simulation method presented in this study can be applied to complex geological conditions and can be combined with other reservoir simulation methods. The simulation results can provide rich training samples for artificial intelligence and other emerging technologies.

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“…In numerical research of granular materials, meshless methods, such as the discrete element method (DEM) [12], molecular dynamics (MD) [13,14], as well as peridynamics (PD) [15], have been very…”

Section: Introductionmentioning

confidence: 99%

DEM Analysis of Single-Particle Crushing Considering the Inhomogeneity of Material Properties

Zhang

Huang

2021

Acta Mech. Solida Sin.

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Crushing characteristics of single particles are the basis of granular material simulation with discrete element method (DEM). To improve the universality and precision of crushable DEM model, inhomogeneous stiffness and strength properties are introduced into the bonded particle method, with which the Weibull distribution and size effect of particle strength can be reproduced without deleting elementary balls. The issues of particle strength and carrying capacity under complex contact conditions are investigated in this work by symmetric loading tests, asymmetric loading tests, and ball–ball loading tests. Results of numerical experiments indicate that particle carrying capacity is significantly influenced by coordination numbers, the symmetry of contact points, as well as the relative size of its neighbors. Contact conditions also show impact on single-particle crushing categories and the origin position of inner particle cracks. The existing stress indexes and assumptions of particle crushing criterion are proved to be inappropriate for general loading cases. Both the inherent inhomogeneity and contact conditions of particles should be taken into consideration in the simulation of granular materials.

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Dependency of single-particle crushing patterns on discretization using peridynamics

Cited by 22 publications

References 30 publications

Dense Granular Flow Described by Micropolar Fluid and Its Peridynamic Implementation

Dense Granular Flow Described by Micropolar Fluid and Its Peridynamic Implementation

Numerical simulation of mechanical compaction and pore evolution of sandstone considering particle breakage

DEM Analysis of Single-Particle Crushing Considering the Inhomogeneity of Material Properties

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