Discrete element model for quasi‐brittle rupture under tensile and compressive loading

Koval, Georg; Le, Ba Danh; Chazallon, Cyrille

doi:10.1002/nag.2532

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…as clusters of discrete elements with different parameters [55]. is close-packed assembly has been used by Le et al [55][56][57][58][59] and Liu et al [60] for quasi-brittle failure of asphalt concrete, rocks, and crystals.…”

Section: Discrete Element Methodsmentioning

confidence: 99%

“…e contact behaviour follows a standard linear spring and dash-pot model. When the values of the damping parameters, c n and c t , are a sufficiently small fraction of �� mk n (where m is the particle mass), the inelastic effect is negligible [59]. In this study, only the elastic contribution of the contact force and the relative displacements, δ n and δ t ( Figure 2), will be considered.…”

Section: Contactmentioning

confidence: 99%

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A Discrete Element Model for Damage and Fatigue Crack Growth of Quasi-Brittle Materials

Gao

Koval

Chazallon

2019

Advances in Materials Science and Engineering

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The repeatedly applied low-intensity loads would lead to the damage and fatigue crack growth of mechanical structures made of quasi-brittle materials. In numerical modelling, these two mechanisms are normally treated differently and separately; the damage is usually associated with nonlocal approaches, while the fatigue crack growth is related to the local stress intensity range at the crack tip. In this study, a discrete element model for damage and fatigue crack growth of quasi-brittle materials is proposed, which is able to model the damage and fatigue crack growth simultaneously in one single model. The proposed model achieves the implementation of a continuum damage model in a discrete element code, which is a helpful enrichment of this numerical method. The evaluation method of the stress intensity range during the damage evolution provides a way to couple both failure mechanisms. This feature allows crack initiation to be induced by localized damage and a progressive transition to a fracture behaviour with the crack propagation. Independent parameters for the fatigue damage model and fatigue crack growth model are admitted without any previous calibration. The numerical results are in good agreement with the theoretical predictions of damage and fracture mechanics, and intact and precracked samples are analysed under fatigue loading to show the consistent coexistence of fractured and damaged zones in a single model.

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Section: Discrete Element Methodsmentioning

confidence: 99%

Section: Contactmentioning

confidence: 99%

A Discrete Element Model for Damage and Fatigue Crack Growth of Quasi-Brittle Materials

Gao

Koval

Chazallon

2019

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Initially developed by Cundall and Strack [24] for modelling granular and particulate systems, these methods were further adapted to study the fracture of quasi-brittle materials, such as concrete [25,26] and rocks [27]. Despite the simple (and physical) local point of view of ruptures, the intrinsic scale effects related to the particle size and characteristic length l ch ) also affect the response of the model to quasi-brittle rupture [28][29][30].…”

Section: Introductionmentioning

confidence: 99%