Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

Naderi, Sadjad; Zhang, Mingzhong

doi:10.1016/j.cemconcomp.2020.103889

Cited by 66 publications

(17 citation statements)

References 59 publications

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“…Furthermore, continuum elements were assumed to remain in the linear elastic region while whole nonlinear characteristics concentrated on the behaviour of CIEs [45]. Zero-thickness CIEs are more advantageous in propagating discontinuous fractures as remeshing is not required along with the crack propagation [12,45,[48][49][50][51][52][53][54][55]. The crack initiation location is completely arbitrary, and the crack path is fully dependent on fracture energy which resembles the reality of fracture propagation in a polycrystalline material like concrete.…”

Section: Insertion Of Zero-thickness Cohesive Elementsmentioning

confidence: 99%

Aggregate interlock in fractured concrete mesoscale models: a novel finite element modelling approach

Jayasinghe

Gunawardena

Mendis

2022

Archiv.Civ.Mech.Eng

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Aggregate interlock is a stress transfer mechanism in cracked concrete. After concrete cracks under tensile loading, crack interfaces can experience significant slip deformation due to the applied crack kinematics. Upon rising slip along crack interfaces, aggregate interlock stresses are generated which transfer shear stress and normal stress. Many experimental programmes and analytical expressions have been developed for several decades. However, a finite element model considering realistic crack surfaces was still not developed. The complexity of developing a FE model lies due to the mesoscopic nature of the problem. In this study, concrete mesoscale models were employed to generate realistic cracked concrete surfaces. Uniaxial tensile fracture propagation in concrete mesoscale models were achieved using Zero-thickness cohesive elements approach. Once cracked concrete FE models are developed, validation of the proposed FE models was conducted against two experimental campaigns. The study comprises the evaluation of the surface roughness index of the cracked concrete surfaces. The FE model predicts secondary cracking under low initial crack widths and mixed mode angles. FE predictions were further compared with Walraven’s simplified formulae, Bažant’s rough crack model, Cavagnis’s aggregate interlock formulae and contact density model and consistence agreement was observed. Finally, strengths and weaknesses of the proposed FE modelling approach for aggregate interlock was discussed and further implementations were also highlighted.

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Section: Insertion Of Zero-thickness Cohesive Elementsmentioning

confidence: 99%

Aggregate interlock in fractured concrete mesoscale models: a novel finite element modelling approach

Jayasinghe

Gunawardena

Mendis

2022

Archiv.Civ.Mech.Eng

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“…Finite element approach as a powerful numerical tool [5][6][7] has been frequently used to estimate the mechanical response of SFRPs in a wide range of domains [8][9][10][11][12][13][14][15][16][17]. In this regard, Breuer and Stommel [18] studied the effects of fiber geometry, packing configuration, fiber length and orientation distributions on the elastic response of SFRPs.…”

Section: Introductionmentioning

confidence: 99%

A hierarchical multi-scale analytical approach for predicting the elastic behavior of short fiber reinforced polymers under triaxial and flexural loading conditions

Ahmadi

Hajikazemi

Rashidinejad

et al. 2022

Composites Science and Technology

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“…The results show that the algorithm is more efficient and robust. By using an in-house code based on Voronoi tessellation and splining techniques, Naderi et al [ 13 ] developed a 3D mesoscale model of concrete composed of real-shape coarse aggregates, mortar, and ITZ. The results show that the irregular shape of the aggregate plays an important role in the micro-crack nucleation and ultimate fracture pattern.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of material models, the material damage model or fracture model of each phase (e.g., [ 9 , 10 , 13 , 29 ]) that is used in the majority of current research on damage and fracture simulation of mesoscopic models of concrete is based on a macroscopic phenomenological method. That is, rather than the physical background of damage and fracture, or the mesoscopic structural changes within the material, it focuses on the effect of damage and fracture on the macroscopic mechanical properties of the material.…”

Section: Introductionmentioning

confidence: 99%

Calculation and Analysis of Temperature Damage of Shimantan Concrete Gravity Dam Based on Macro–Meso Model

et al. 2022

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Considering that ANSYS software will automatically quit or the computer will freeze when generating random aggregate models of concrete by using some existing methods that are based on the ANSYS parametric design language (APDL), a new method of random aggregate placement using the ESEL command in APDL and the rotation of the local coordinate system is proposed in this paper. According to this method, a multiscale macroscopic and mesoscopic finite element model of the No. 9 non-overflow dam section of Shimantan dam is constructed. In addition, considering that most of the damage models adopted by the existing mesoscale simulation of concrete damage and fracture cannot take into account the interaction between aggregates, interfacial transition zone (ITZ), and mortar, an improved anisotropic temperature damage model is proposed in this paper. The aggregate placement simulation results show that the method presented in this paper can quickly generate two-dimensional (2D) random concrete aggregates, and the generation of three-dimensional (3D) aggregates can also be completed in a very short time, which can greatly improve the aggregate generation efficiency. Moreover, the aggregate shape generated by this method is very close to the real concrete aggregate shape. The crack propagation simulation results show that the sudden rise and fall of temperature can cause damage in the mortar and ITZ of concrete inside the dam body, which is the main reason for the generation of macroscopic through-cracks in the No. 9 non-overflow dam section of Shimantan dam during the operation period. Finally, it can be learned from the results that the method presented in this paper is reasonable and feasible, and can be extended to the crack propagation simulation of some other concrete gravity and arch dams.

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Meso-scale modelling of static and dynamic tensile fracture of concrete accounting for real-shape aggregates

Cited by 66 publications

References 59 publications

Aggregate interlock in fractured concrete mesoscale models: a novel finite element modelling approach

Aggregate interlock in fractured concrete mesoscale models: a novel finite element modelling approach

A hierarchical multi-scale analytical approach for predicting the elastic behavior of short fiber reinforced polymers under triaxial and flexural loading conditions

Calculation and Analysis of Temperature Damage of Shimantan Concrete Gravity Dam Based on Macro–Meso Model

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