An elastoplastic micro-mechanical damage model for quasi-brittle materials under uniaxial loading

Guo, Yadong; Kuang, Yachuan

doi:10.1177/1056789518823050

Cited by 13 publications

(9 citation statements)

References 33 publications

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“…In Babu et al (2006), the researchers presented the concrete plasticity model in stress space and proposed the new expression for loading surface with expansion and distortion of shape under hardening. The micromechanical plastic damage model is proposed by Guo and Kuang (2019). The model considered the heterogeneity of quasi-brittle material and utilized a series of microelements with plastic elements to record plastic deformation with stochastic damage formulation for the degradation of the stiffness.…”

Section: Coupled Plastic Damage Modelsmentioning

confidence: 99%

A review of continuum damage and plasticity in concrete: Part I – Theoretical framework

Park

Ahmed

Voyiadjis

2021

International Journal of Damage Mechanics

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In the past few decades, extensive research on concrete modeling to predict behavior, crack propagation, microcrack coalescence by utilizing different approaches (fracture mechanics, continuum damage mechanics) were investigated theoretically and numerically. The presented paper aims to review the theoretical work of continuum concrete damage and plasticity modeling in part I of the work. The detailed theoretical work is presented with some of the supporting work related to multiscale modeling and phase-field modeling is also part of this paper. Few other applications related to rate-dependent models and fatigue in concrete are also discussed. In part II of this work, the review of numerical work limited to finite element is presented. Some open issues in concrete damage modeling and future research needed are also discussed in part II.

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Section: Coupled Plastic Damage Modelsmentioning

confidence: 99%

A review of continuum damage and plasticity in concrete: Part I – Theoretical framework

Park

Ahmed

Voyiadjis

2021

International Journal of Damage Mechanics

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“…Inherent physical and chemical properties of BC such as high surface area have been found to enhance micro-porosity, adsorption capacity and alters the hydraulic characteristics of soil (Lehmann and Joseph, 2009; Reddy et al., 2015). However, the engineering viability of applying BC in landfill cover system also depends upon the mechanical characteristics in addition to the hydraulic considerations (Guo and Kuang, 2019; Sadasivam and Reddy, 2015b). Limited studies conducted so far have focused on the investigation of the mechanical properties of SBC, most of which have shown an improvement in the shear strength parameters of SBC using direct shear test.…”

Section: Introductionmentioning

confidence: 99%

Influence of biochar from animal and plant origin on the compressive strength characteristics of degraded landfill surface soils

Bora

Bordoloi

Kumar

et al. 2020

International Journal of Damage Mechanics

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Growing awareness of sustainability in the landfill cover system has increased the use of biochar amendment for degraded landfill surface soils. Hydraulic and vegetative benefits of biochar on cover soil have been studied in the past, while ignoring mechanical characteristics, which is important to understand progressive failure of landfill infrastructure. In this study, the mechanical characteristics of four soil–biochar composites were investigated by conducting 81 unconfined compressive strength test. The results based on four in-house produced biochar were used to study the effect of compaction state (density, moisture content) and biochar percentage (5% and 10%) on unconfined compressive strength of soil–biochar. The ductility of soil–biochar was investigated for all the four biochars. Results from this study indicate a contrasting observation of strength gain depending on the type of biochar. The unconfined compressive strength of soil–biochar is potentially influenced by the different surface functional groups of biochar (hydrophilicity/hydrophobicity) and soil-biochar interlocking. It was noted that the peanut shell biochar gave comparable unconfined compressive strength of soil–biochar with that of bare soil for different compaction state. However, a diminution in the unconfined compressive strength was observed for all the other three soil–biochar sourced from water hyacinth, saw dust, and poultry litter. The study indicates that the use of biochar in soils does not ensure an improvement in the strength of soil–biochar. Enhancement in ductility was found for all the four soil–biochar irrespective of compaction state. Improvement in ductility was maximum when the soil–biochar is compacted at the dry state of optimum. Plant-based biochar has higher potency to increase the ductility of soil as compared to the animal-based biochar. Our study identifies peanut shell biochar ideal for landfill cover amendment material, considering its mechanical characteristics and design criterion. Soil biochar composite from water hyacinth, saw dust, and poultry litter can be used for potential application in green-infrastructure.

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“…It is assumed that the micro-unit strength is subject to some statistical distribution, and the microscopic heterogeneity of the quasi-brittle material has been considered. Since then, different improvements have been made to the PBS model in references [22][23][24][25]. In these studies, the constitutive models were based on the macroscopic continuous damage mechanics theory to determine the microscopic damage mechanism, the damage variables, and the damage evolution.…”

Section: Introductionmentioning

confidence: 99%

The Statistical Damage Constitutive Model of the Mechanical Properties of Alkali-Resistant Glass Fiber Reinforced Concrete

2020

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Alkali-resistant glass fiber reinforced concrete (AR-GFRC) has greatly improved in terms of tensile strength, toughness, durability, and reduction of cracking, which has been proven by testing. However, the constitutive relationship of fiber reinforced concrete under complicated stress represents a complex theoretical problem. In order to investigate the microscopic damage evolution and failure mechanism of AR-GFRC, the meso-statistical damage theory, microcontinuum theory, and composite material theory were considered, and uniaxial tensile tests of two types of AR-GFRC were conducted. A new damage variable expression of the AR-GFRC was proposed, and the stress-strain curve was redefined by considering the residual strength based on experimental fitting parameters and statistical parameters. A Weibull distribution was assumed and a statistical damage constitutive model was developed of the deformation process of the AR-GFRC while considering the residual strength effect; detailed calculation methods to determine the mechanical and statistical parameters of the concrete were developed. The validation results show that the theoretical stress-strain curve of the constitutive model is in good agreement with the experimental curve and the trend is consistent.

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An elastoplastic micro-mechanical damage model for quasi-brittle materials under uniaxial loading

Cited by 13 publications

References 33 publications

A review of continuum damage and plasticity in concrete: Part I – Theoretical framework

A review of continuum damage and plasticity in concrete: Part I – Theoretical framework

Influence of biochar from animal and plant origin on the compressive strength characteristics of degraded landfill surface soils

The Statistical Damage Constitutive Model of the Mechanical Properties of Alkali-Resistant Glass Fiber Reinforced Concrete

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