Numerical aspects of a problem with damage to simulate mechanical behavior of a quasi-brittle material

Peyrot, Isabelle Comby; Bouchard, Pierre; Bay, François; Bernard, Fabrice; Garcia-Diaz, E.

doi:10.1016/j.commatsci.2007.01.018

Cited by 10 publications

(2 citation statements)

References 4 publications

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“…The numerical simulation method can effectively solve the limitations of fracture tests and crack measurements, which is beneficial to systematically estimate the related performance of the structure, and save the resources required for experimental research. Simulation of nonlinear problems in quasi-brittle materials, especially damage and degradation, is one of the popular research tasks in current civil engineering [ 5 ]. However, due to the existence of the fracture process zone in quasi-brittle materials, the classical linear elastic fracture mechanics (LEFM) theory cannot be directly applied to quasi-brittle materials [ 6 ], and the propagation of cracks in quasi-brittle materials is a discrete problem, which should be studied locally.…”

Section: Introductionmentioning

confidence: 99%

Construction of Discrete Element Constitutive Relationship and Simulation of Fracture Performance of Quasi-Brittle Materials

et al. 2022

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In order to solve the problem that the built-in parallel bond model in the discrete element software cannot adequately simulate the post-peak fracture behavior of quasi-brittle materials, a linear cohesive model was established. First, two particles are used to simulate the interface constitutive behavior in different modes. The results show that the new model can better simulate the behavior of Mode-I fracture, Mode-II fracture, and Mixed-mode fracture. Then, the influence of micro-parameters on the newly constructed constitutive model is analyzed, which provides a basis for the determination of micro-parameter values. Finally, the proposed softening model is applied to a three-point bending test of mortar, and the fracture behavior obtained is compared to the acoustic emission results. The simulation results also show that the constitutive model we built can be used to simulate the fracture behavior of quasi-brittle materials such as mortar and concrete.

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Section: Introductionmentioning

confidence: 99%

Construction of Discrete Element Constitutive Relationship and Simulation of Fracture Performance of Quasi-Brittle Materials

et al. 2022

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“…However, at the initial stage of pouring, the fluidity of mortar near the surface of the aggregate is weakened, and the chemical potential energy caused by different ion concentrations results in higher porosity and lower strength of the ITZ than bulk cement paste [4,5]. is makes the ITZ the cause of dry shrinkage of concrete, creep, and even damage due to cracking [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A 3D FEM Mesoscale Numerical Analysis of Concrete Tensile Strength Behaviour

Guo

2021

Advances in Materials Science and Engineering

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A three-dimensional (3D) finite element method (FEM) based on an inserted cohesive element numerical analysis procedure was developed for concrete mesoscale systems on the ABAQUS platform with python scripts. Aggregates were generated based on dividing the existing geometrical element algorithms to randomize arbitrary spheres. Simultaneously, randomizations of the maximum aggregate size and uniform distributions of aggregate particles were also considered. An FEM for the mortar phase in concrete mesoscale systems was generated along with the interfacial transition zone (ITZ) by inserting a cohesive element. Numerical parameter analyses were performed for nine different concrete systems by varying the coarse aggregate volume fraction (α) and the ITZ tension strength (ITZ-S). The mechanical performance of concrete systems with the coupling effects of α and ITZ-S was evaluated for simulated tensile loading. The results of the numerical simulations for mechanical properties, such as the simulated tensile strengths and tension damage behaviour of concrete systems, were verified with experimental results. The proposed aggregate and ITZ generation approach and numerical simulation procedure can be used by researchers to better understand how aggregate volume fraction and ITZ strength affect the tensile behaviour of concrete mesoscale systems.

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Structural failure prediction of quasi-brittle structures: Modeling and simulation

Mattos

Pires-Domingues

Rochinha

2009

Computational Materials Science

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Numerical aspects of a problem with damage to simulate mechanical behavior of a quasi-brittle material

Cited by 10 publications

References 4 publications

Construction of Discrete Element Constitutive Relationship and Simulation of Fracture Performance of Quasi-Brittle Materials

Construction of Discrete Element Constitutive Relationship and Simulation of Fracture Performance of Quasi-Brittle Materials

A 3D FEM Mesoscale Numerical Analysis of Concrete Tensile Strength Behaviour

Structural failure prediction of quasi-brittle structures: Modeling and simulation

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