A thermodynamic correlation between damage and fracture as applied to concrete fatigue

Fathima, K.; Kishen, J.M. Chandra

doi:10.1016/j.engfracmech.2015.07.019

Cited by 21 publications

(2 citation statements)

References 15 publications

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“…In the damage constitutive models of concrete, the damage variable and damage evolution, the two basic factors of damage mechanics, are introduced into the stress-strain relationship for accurate depiction of concrete deterioration. The typical damage constitutive models include Loland model [20], Mazars model [21], piecewise linear damage model [22] and piecewise curve damage model [23].…”

Section: Literature Reviewmentioning

confidence: 99%

An Elastic-plastic Constitutive Model of Concrete Based on Thermodynamic Principles and Its Application in Arch Dam Design

Xiang¹

2019

IJHT

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The safety of arch dams is greatly affected by the nonlinearity of the concrete. This paper introduces the basic theories on concrete constitutive models, analyzes the incremental energy dissipation function of concrete in the plastic process, and derives an elastic-plastic constitutive model for concrete based on thermodynamic principles. The proposed model was applied to examine the dynamic nonlinear seismic responses of an actual arch dam, and compared with several other models. Besides, the effect of strain rate on the concrete performance was also discussed in details. The research findings provide a reference for the safety evaluation of arch dam design.

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Section: Literature Reviewmentioning

confidence: 99%

An Elastic-plastic Constitutive Model of Concrete Based on Thermodynamic Principles and Its Application in Arch Dam Design

Xiang¹

2019

IJHT

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“…At early stage, the fatigue crack growth rate was usually described as a function of the stress intensity factor amplitude by utilizing the Paris' law (Bažant and Xu 1991;Paris and Erdogan 1963;Slowik et al 1996). Afterwards, many comprehensive expressions for the fatigue crack growth rate of concrete have been proposed based on dimensional analysis (Ray and Kishen 2011;Simon and Kishen 2017), damage mechanics (Bhattacharya and Ellingwood 1998;Fathima and Kishen 2015;Nguyen et al 2018) and fractal geometry concepts (Carpinteri et al 2010;Carpinteri and Spagnoli 2004). Moreover, the influence of the pre-fatigue loading with high stress levels on the fracture properties of concrete has also been studied.…”

Section: Introductionmentioning

confidence: 99%

Fracture Properties of Rock-Concrete Interface after Fatigue Loading

Zhao

Dong

Zhang

et al. 2023

J. Mater. Civ. Eng.

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To investigate the fracture properties of the rock-concrete interface after fatigue loading, the fatigue tests with the maximum loads of 60% and 70% of the ultimate load were first carried out under threepoint bending (TPB) loading. After 80000 fatigue loading cycles, the specimens were subjected to quasi-static TPB loading until failure. The fracture parameters including the nominal initial fracture toughness K ini 1C , the nominal unstable fracture toughness K un 1C , the critical crack length ac, the fracture energy Gf and the characteristic length lch were obtained based on the experimental results. The test results indicated that the interfacial crack did not propagate in the fatigue tests if the applied maximum fatigue load was lower than the initial cracking load under quasi-static loading. However, microcracks would occur and accumulate around the pre-crack tip during the fatigue process, which generates a larger damage area than that under the quasi-static load condition. The larger damage area absorbed more energy provided by the applied loading in the subsequent monotonic TPB tests, leading to the increases of the initial cracking load and the nominal initial fracture toughness. Accordingly, a distribution model of the nominal initial fracture toughness along the interfacial ligament was derived for the fatigued specimens. Furthermore, a crack propagation criterion based on the nominal initial fracture toughness was proposed and employed to simulate the fracture process of the fatigued specimens. The good agreements between the experimental and numerical results validated the proposed distribution model and the crack propagation criterion.

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