Bond calibration method for Young’s modulus determination in the discrete element method framework

Estay, Danilo; Chacana, F.; Ibarra, J. A.; Perez, Laetitia; Lascano, Sheila

doi:10.1007/s10035-017-0734-5

Cited by 18 publications

(8 citation statements)

References 11 publications

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“…We presented an approach based on the direct stiffness method (DSM) and typical assumptions for small deformations. A comparable DSM-based approach for bond calibration was presented by Estay et al [8]. They derive their method from the FEM and test the accuracy of the approach applying it for different particle diameter ratios.…”

Section: Discussionmentioning

confidence: 99%

Linearization-based methods for the calibration of bonded-particle models

Jarolin

Dosta

2020

Comp. Part. Mech.

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In the work at hand, two methods for the calibration of the elastic material parameters of bonded-particle models (BPMs) are proposed. These methods are based on concepts of classical mechanics and enable a faster calibration compared to the conventional trial and error strategy. Moreover, they can be used to counter-check the consistency of the BPM. In the first method, the mathematical model is linearized and solved in a classical matrix-vector formulation similar to a finite element scheme. Further linearization in the second approach enables the direct calculation of the elastic stiffness tensor, reducing computational costs massively. To analyze the capabilities and limitations of both methods, they have been applied in three different case studies. Obtained results have shown that the new strategy allows us to significantly reduce the calculation time.

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Section: Discussionmentioning

confidence: 99%

Linearization-based methods for the calibration of bonded-particle models

Jarolin

Dosta

2020

Comp. Part. Mech.

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“…The most widely used calibration strategies are based on inverse analysis principle with application of different methods for design of experiments [ 14 , 23 , 60 , 72 ]. More advanced strategies, like proposed by Estay et al [19] or the linearizationbased method used by Jarolin et al [31] , allow to estimate the model parameters directly based on the structural model. However, since the developed BPM model has a relatively small number of unknown parameters, the relatively simple parameter identification procedure was applied in this work.…”

Section: Model Parameters Identificationmentioning

confidence: 99%

Mesh-free micromechanical modeling of inverse opal structures

Dosta

Bistreck

Skorych

et al. 2021

International Journal of Mechanical Sciences

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The application of mesh-free discrete element method (DEM) for modeling of macroporous inverse opals is proposed. The developed and implemented DEM-based strategy is applied to analyze stiffness and strength of inverse opals made of pure silica and inverse opals coated with titania layers of various thicknesses. Also, the influence of the porosity of the initial packing on the properties of the material is investigated. Simulation results have shown that due to the heterogeneous macroscopic structure and unequal material distribution in nodes, struts or near interstitial pores, strong inhomogeneities of the stress distribution arise. Spots of localized stresses located near the interpore openings are the sources of initial defects and small interpore cracks. Reducing the overall porosity or an additional coating of the structure with a titania layer allows to partially homogenize and improve its mechanical properties.It was shown that the obtained simulation results are in very good agreement with previous studies. Despite large computational effort, the performed analysis confirms the high efficiency of the proposed DEM-based approach and demonstrates its great potential for use in problems of a similar class: for modelling of complex-structured multicomponent materials.

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“…Compression test is a common mechanical property test method used to evaluate the shear failure of brittle materials [64,66,68,67,73]. Its schematic diagram and DEM simulation failure diagram are shown in Fig.…”

Section: Compression Testmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

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In recent years, the discrete element method (DEM) has been used to model the bulk material, especially for the brittle materials (such as rocks, ceramics, concrete, ice, etc.) with various mechanical properties or responses by setting serials of contact properties (such as bonds) in the particle assembly. These bonds can withstand a certain amount of force and/or moment, so that the stresses executed in the bond can be used for determining the initiation and propagation of micro-crack. There are increasing evidences over the last twenty years that the DEM is becoming an effective numerical method to simulate the cracking, crushing and deformation of continuous media under external loads. The DEM has now been widely used in the field of processing and machining of rock, ceramic, concrete and other brittle materials. In this paper, the theoretical principles, formulations, contact models as well as the numerical solving processes of DEM are introduced. The applications of DEM for the machining processes of brittle and rigid materials such as ceramics are described and reviewed in detail, with future development trend also discussed.

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Bond calibration method for Young’s modulus determination in the discrete element method framework

Cited by 18 publications

References 11 publications

Linearization-based methods for the calibration of bonded-particle models

Linearization-based methods for the calibration of bonded-particle models

Mesh-free micromechanical modeling of inverse opal structures

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

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