A multiscale approach for modeling fatigue crack growth in concrete

Simon, Keerthy M.; Kishen, J.M. Chandra

doi:10.1016/j.ijfatigue.2017.01.007

Cited by 38 publications

(13 citation statements)

References 21 publications

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“…The common shortcoming of them is that the inherent heterogeneity of concrete is neglected, and thus the realistic behaviour of concrete under fatigue loading, e.g., the propagation of microcracks, is difficult to be predicted. In order to gain a better understanding of the fatigue fracture of concrete, the multiscale approach is expected to be a proper choice [26,27,28]. According to the study of [27], a mesoscopic model based on the real microstructure was established to investigate the evolution of fatigue damage in concrete, in which the different fatigue damage functions of individual components were assumed.…”

Section: Introductionmentioning

confidence: 99%

Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter

et al. 2018

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Cement paste is the main binding component in concrete and thus its fundamental properties are of great significance for understanding the fracture behaviour as well as the ageing process of concrete. One major aim of this paper is to characterize the micromechanical properties of cement paste with the aid of a nanoindenter. Besides, this paper also presents a preliminary study on the fatigue behaviour of cement paste at the micrometer level. Miniaturized cantilever beams made of cement paste with different water/cement ratios were statically and cyclically loaded. The micromechanical properties of cement paste were determined based on the measured load-displacement curves. The evolution of fatigue damage was evaluated in terms of the residual displacement, strength, and elastic modulus. The results show that the developed test procedure in this work is able to produce reliable micromechanical properties of cement paste. In addition, little damage was observed in the cantilever beams under the applied stress level of 50% to 70% for 1000 loading cycles. This work may shed some light on studying the fatigue behaviour of concrete in a multiscale manner.

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Section: Introductionmentioning

confidence: 99%

Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter

et al. 2018

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“…According to the experiments, the value of m for concrete is generally between 1.0 and 2.5. In order to make the crack growth rate lies between 10 −5 mm/c and 10 −2 mm/c [12,34], the empirical parameters C and m are adopted as C = 10 −8 , m = 1.5. 3.…”

Section: Fatigue Crack Growth Lawmentioning

confidence: 99%

“…The approaches of damage mechanics and fracture mechanics are generally employed to model the progressive fatigue accumulation in concrete materials [8][9][10][11][12]. In the framework of damage mechanics, a damage variable is required to be defined.…”

Section: Introductionmentioning

confidence: 99%

Microscopic Multiple Fatigue Crack Simulation and Macroscopic Damage Evolution of Concrete Beam

Tang

et al. 2019

Applied Sciences

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Microcracks in concrete can coalesce into larger cracks that further propagate under repetitive load cycles. Complex process of crack formation and growth are essentially involved in the failure mechanism of concrete. Understanding the crack formation and propagation is one of the core issues in fatigue damage evaluation of concrete materials and components. In this regard, a numerical model was formulated to simulate the thorough failure process, ranging from microcracks growth, crack coalescence, macrocrack formation and propagation, to the final rupture. This model is applied to simulate the fatigue rupture of three-point bending concrete beams at different stress levels. Numerical results are qualitatively consistent with the experimental observations published in literature. Furthermore, in the framework of damage mechanics, one damage variable is defined to reflect stiffness reduction caused by fatigue loading. S-N curve is subsequently computed and the macroscopic damage evolution of concrete beams are achieved. By employing the combined approaches of fracture mechanics and damage mechanics, made possible is the damage evolution of concrete beam as well as the microscopic multiple fatigue crack simulation. The proposed approach has the potential to be applied to the fatigue life assessment of materials and components at various scales in engineering practice.

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“…Concrete structures like tall towers, bridges and modern buildings made of high strength concretes are highly sensible to suffer failures and damages under fatigue loads [1]. In this context, plenty of experimental tests are available in the scientific literature dealing with the fatigue behavior of cement-based composites [2,3].…”

Section: Introductionmentioning

confidence: 99%

A unified multiscale modelling approach for concrete fatigue with microscale damage‐mechanism implementations

Caggiano

Schicchi

Yang

et al. 2019

Proc Appl Math and Mech

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A micro-scale-based approach for the numerical analysis of cement-based materials, subjected to low-and high-cycle fatigue actions, is presented in this paper. The constitutive model is aimed at describing the evolving microstructural changes caused by cyclic loading protocols. The plastic-damage-based model is formulated combining the concepts of fracture-energy theories and damage stiffness degradations, representing the key phenomena occurring in concrete under fatigue.

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A multiscale approach for modeling fatigue crack growth in concrete

Cited by 38 publications

References 21 publications

Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter

Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter

Microscopic Multiple Fatigue Crack Simulation and Macroscopic Damage Evolution of Concrete Beam

A unified multiscale modelling approach for concrete fatigue with microscale damage‐mechanism implementations

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