Modeling of multiple cracks in reinforced concrete members using solid finite elements with high aspect ratio

Manzoli, Osvaldo L.; Maedo, Michael A.; Rodrigues, Eduardo A.; Bittencourt, Túlio Nogueira

doi:10.1201/b16645-43

Cited by 6 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A MFT based on the inclusion of solid HAR interface elements was recently proposed to model the formation and propagation of drying cracks in soils [40]. The high aspect ratio elements [22,23] are incorporated in between the standard finite elements of a mesh. The main stages associated with the adaptation of a traditional FE mesh into a fragmented one are presented in Fig.…”

Section: Mesh Fragmentation Techniquementioning

confidence: 99%

“…where u ½ ½ n , u ½ ½ s and u ½ ½ l are the components of the displacement jump according to the local (n, s, l) coordinate system. More details can be found elsewhere [21][22][23].…”

Section: Interface Solid Finite Elementmentioning

confidence: 99%

“…The formation and propagation of discontinuities in solids and porous media is a very challenging problem that is driving the development of both experimental [16,18,28,34,38,39] and advanced numerical techniques [2,3,14,31,42]. In this context, the mesh fragmentation technique (MFT) in conjunction with high aspect ratio (HAR) elements has been used with success to model the problem of formation and grow of drying cracks in soils [40], as well as the problem of fracture generation and propagation in concrete structures [22,23,37]. Some advantages of this technique are discussed in Sect.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An orthotropic interface damage model for simulating drying processes in soils

et al. 2017

View full text Add to dashboard Cite

The study of drying process in soils has received an increased attention in the last few years. This is very complex phenomenon that generally leads to the formation and propagation of desiccation cracks in the soil mass. In recent engineering applications, high aspect ratio elements have proved to be well suited to tackle this type of problem using finite elements. However, the modeling of interfaces between materials with orthotropic properties that generally exist in this type of problem using standard (isotropic) constitutive model is very complex and challenging in terms of the mesh generation, leading to very fine meshes that are intensive CPU demanding. A novel orthotropic interface mechanical model based on damage mechanics and capable of dealing with interfaces between materials in which the strength depends on the direction of analysis is proposed in this paper. The complete mathematical formulation is presented together with the algorithm suggested for its numerical implementation. Some simple yet challenging synthetic benchmarks are analyzed to explore the model capabilities. Laboratory tests using different textures at the contact surface between materials were conducted to evaluate the strengths of the interface in different directions. These experiments were then used to validate the proposed model. Finally, the approach is applied to simulate an actual desiccation test involving an orthotropic contact surface. In all the application cases the performance of the model was very satisfactory.

show abstract

Section: Mesh Fragmentation Techniquementioning

confidence: 99%

“…where u ½ ½ n , u ½ ½ s and u ½ ½ l are the components of the displacement jump according to the local (n, s, l) coordinate system. More details can be found elsewhere [21][22][23].…”

Section: Interface Solid Finite Elementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An orthotropic interface damage model for simulating drying processes in soils

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Since the mesoscale study of concrete mechanical behaviors can obtain a more fundamental understanding of concrete damage and failure mechanisms and provide a deep insight into macroscopic mechanical behaviors, it has become a hot research area of concrete material and achieved fruitful results. Up to date, the finite element method (FEM), which helps many researchers to simulate the effects of multiphase distribution on the mechanical response and damage properties of concrete [5][6][7][8][9][10][11][12][13][14][15][16][17][18], is still being a dominant method to model different behaviors of concrete at macro-and mesoscales. However, with the development of computing technology and numerical methods, more and more approaches are being employed to explain the damage mechanism of concrete structure [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Mesodamage Behavior of Concrete Based on Material Point Method

Liu

Zou

et al. 2020

Advances in Civil Engineering

View full text Add to dashboard Cite

Concrete consists of coarse aggregates, mortar matrix, and interfacial transition zone (ITZ) between them at the mesoscale. Considering these three phases, many numerical tests have been conducted to study the mesodamage behavior of concrete, in which a variety of numerical methods have also been adopted. These methods are mainly based on the finite element method (FEM); however, some other methods have been proven to be helpful as well. For example, the material point method (MPM) has the advantage of building a numerical model based on pixel or voxel of the image and is capable of solving large deformation problems. In view of this, MPM is introduced in this paper. Firstly, a method for establishing the numerical specimen is put forward, considering the original sample of its mesoscopic geometric character. Then, a stochastic damage constitutive model considering the heterogeneity of the concrete is proposed. Next, the numerical model and the constitutive model are incorporated into an MPM code to conduct numerical tests. The uniaxial tension and compression tests of a random-aggregate model and a double-aggregate specimen under uniaxial tension are then simulated numerically to validate the proposed method. Results show that the proposed method can well capture the main macroscopic mechanical behavior of concrete and the mesoscopic damage initiation and propagation. It is also found that MPM can save the time of model establishing and improve calculation efficiency. The influences of different parameters of the proposed constitutive model are also clarified through a parametric study. The proposed method can provide a useful tool for concrete numerical testing and for studying the mechanical behavior of concrete at mesoscale.

show abstract

“…Both methods require techniques to track the crack path during the analysis to provide information about the position of the crack surfaces for the corresponding discontinuous kinematic enrichment. These techniques are relatively simple to represent a few cracks in 2D analyses but can be very complex and even unsuitable for problems involving multiple crack surfaces in 3D analysis (Jager et al, 2008;Manzoli et al, 2014Manzoli et al, , 2016.…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation of fracture in a restored premolar tooth using high aspect ratio elements

et al. 2018

View full text Add to dashboard Cite

Introduction: The term cracked tooth syndrome refers to an incomplete fracture of a vital posterior tooth that involves the dentin and occasionally extends into the pulp. There is a very limited number of publications trying to model dentin crack growth using numerical techniques. Therefore, it is essential to numerically model this phenomenon in order to improve the clinical procedures. Methods: A 2D finite element model is proposed to simulate crack initiation and propagation in a restored premolar tooth. The geometric model was based on computed tomography data. A special finite element technique, named mesh fragmentation technique, is used to model and analyze the behavior of the tooth. This technique was used to model cracks in quasi-brittle materials based on the use of interface solid finite elements with high aspects ratio. A tension damage constitutive relation between stresses and strains consistent with the continuous strong discontinuity approach is used to describe crack formation and propagation. Results: The main aspects of modeling technique and procedures are explained in detail as well as the whole results, including both elastic and fracture analyses of the restored tooth. Conclusion: The results of the current fracture analysis show that, under various loading conditions, there is no crack initiation in the restored tooth under typical loading magnitude. However, in the case of tooth with a pre-existing crack, which can be aroused during the restoration process, a crack propagation was observed, while they did not reach a critical fracture state.

show abstract

Modeling of multiple cracks in reinforced concrete members using solid finite elements with high aspect ratio

Cited by 6 publications

References 1 publication

An orthotropic interface damage model for simulating drying processes in soils

An orthotropic interface damage model for simulating drying processes in soils

Numerical Simulation of Mesodamage Behavior of Concrete Based on Material Point Method

Finite element simulation of fracture in a restored premolar tooth using high aspect ratio elements

Contact Info

Product

Resources

About