On finite element modeling of compressive failure in brittle materials

Červenka, Jan; Červenka, Vladimír; Laserna, Santiago

doi:10.1201/b16645-30

Cited by 16 publications

(9 citation statements)

References 1 publication

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“…The stress softening in tension is determined using the crack band approach of Bažant & Oh [2] and analogically in compression according to Cervenka et.al [11]. The crack band L t as well as the crush band size L c are adjusted with regard to the crack orientation approach proposed by Cervenka et al [9].…”

Section: Numerical Modelmentioning

confidence: 99%

Prediction of Shear Failure of Large Beams Based on Fracture Mechanics

Červenka¹,

Červenka²,

Pukl³

et al. 2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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A large beam tested at Toronto University for a prediction contest was simulated by the authors using a nonlinear finite element code. Their entry was chosen as the overall winner of the prediction contest and was a motivation for this case study. The crack propagation was modeled by a smeared crack approach and a fracture mechanics-based cohesive crack model. The paper discusses the model sensitivity to mesh sizes and fracture parameters. A parameter study was performed to examine the model uncertainty of numerical simulation. A probabilistic model of concrete non-homogeneity was used to reflect a more realistic strain localization in the smeared crack model.

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Section: Numerical Modelmentioning

confidence: 99%

Prediction of Shear Failure of Large Beams Based on Fracture Mechanics

Červenka¹,

Červenka²,

Pukl³

et al. 2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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“…Negative value in horizontal axis represents compressive stress state. In terms of the relation between crack width and the compressive strength of concrete, Collins et al (1983), Miyahara et al (1987) and Cervenka et al (2014) confirmed that the concrete compressive strength decreases when the distributed cracks parallel to the loading direction. investigated the influence of a single axially distributed crack on the compressive strength of concrete by the compression test on cylinder or prism specimens, and found that the biggest compressive strength drop reaches approximately 30%, and if the crack width exceeds an upper value, no further deterioration occurs.…”

Section: Size Dependence Mechanism Of the Arch Actionmentioning

confidence: 75%

Numerical Evaluation of Shear Strength Degradation Mechanism Dependent on the Size Increase of RC Deep Beams with Height up to 1.5 Meter by Using 3D Rigid-Body-Spring-Method

Nakamura

Chi³

et al. 2021

ACT

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The purpose of this paper is to clarify the mechanism of shear strength reduction for reinforced concrete deep beams with varying stirrup ratios, due to the beam size increase. Three Dimensional Rigid-Body-Spring-Method was the applied numerical tool. By using the simulation results of reinforced concrete deep beams with the effective depth smaller than 1500 mm, the size dependence of each shear resistance component such as arch, beam and truss actions were investigated, along with the size dependence of localized information such as crack pattern, diagonal crack width and compressive stress. It was revealed that the size effect on shear strength results from the size dependence of the arch action, and the change of stirrup ratio does not show any inhibiting effects on it. The crucial reason for the size effect on the arch action is the size dependence of concrete compressive resultant on beam cross sections, and the critical diagonal crack width, which increases with beam size, is a key factor for the deterioration of concrete compressive strength and the capacity of compressive stress in struts. Moreover, it was found that the critical diagonal crack width not only affects the normalized shear strength, but also has influence on the post-peak behavior of deep beam.

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“…When both failure surface actives, a nested return mapping outlined in Piscesa et al [4] is used. The concrete constitutive model in 3D-NLFEA is similar to that of the plasticity-fracture model in the ATENA software package [5,15] . One can also find some examples of using the 3D-NLFEA finite element package in modeling RC structures in Christianto et al [16] , Prasetyo et al [17] , Alius et al [18] .…”

Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Reinforced Concrete Beam Due to Shear Failure

Piscesa

Alrasyid

Prasetya

et al. 2021

JTS

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This paper investigates the possibility of using a multi-surface plasticity model to predict shear failure in reinforced concrete beams. The analysis is carried out using the in-house software called 3D-NLFEA. The constitutive model for the concrete material is based on the plasticity-fracture model, which had previously developed to simulate the behavior of concrete cover spalling in reinforced concrete columns.To obtain the asymmetric shear failure pattern, random material properties imperfection for each meshed element is used. Two beams available in the literature are investigated and compared with the analysis results using 3D-NLFEA. From the comparisons, excellent agreement between the analysis and the test result was obtained. 3D-NLFEA can predict the peak load accurately. The peak load prediction only varies 2.19% for beam OA1 and 3.28 % for beam OA2, and it was lower than the test results. The failure crack patterns also show a typical diagonal crack extension from the support to the loading steel plate.

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On finite element modeling of compressive failure in brittle materials

Cited by 16 publications

References 1 publication

Prediction of Shear Failure of Large Beams Based on Fracture Mechanics

Prediction of Shear Failure of Large Beams Based on Fracture Mechanics

Numerical Evaluation of Shear Strength Degradation Mechanism Dependent on the Size Increase of RC Deep Beams with Height up to 1.5 Meter by Using 3D Rigid-Body-Spring-Method

Numerical Investigation of Reinforced Concrete Beam Due to Shear Failure

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