Micromechanics based damage model for predicting compression behavior of polymer concretes

Heidari-Rarani, M.; Bashandeh-Khodaei-Naeini, K

doi:10.1016/j.mechmat.2017.11.004

Cited by 25 publications

(5 citation statements)

References 44 publications

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“…They proposed a new micromechanical model by introducing a cohesive zone model to generalized method of cells (GMC). Heidari-Rarani and Bashandeh-Khodaei-Naeini 86 performed a comprehensive study of the effect of shapes and distribution of reinforcements, boundary conditions, and interface properties on the compressive behavior of particle reinforce epoxy matrix. Danzi et al.…”

Section: Multi-scale Computational Homogenizationmentioning

confidence: 99%

Micromechanical modeling of the mechanical behavior of unidirectional composites – A comparative study

Heidari-Rarani

Bashandeh-Khodaei-Naeini

Mirkhalaf

2018

Journal of Reinforced Plastics and Composites

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Laminated fiber reinforced composites are increasingly being used in various load-bearing applications including for instance aerospace and wind energy power industries. Understanding the mechanical behavior of a unidirectional lamina as the basic part of a laminated composite is of great interest from a design perspective and also for the analysis of composite structures. At the micro-level, mechanical behavior of a lamina including stiffness and strength is studied based on the mechanical properties of individual constituents. This study focuses on micromechanical approaches such as strength of materials, elasticity, semi-empirical, and numerical methods for the prediction of the stiffness and strength of a unidirectional lamina. To assess the accuracy of these models, results of each model are compared against experimental results available in the literature for unidirectional composites with different fiber volume fractions. Moreover, recent studies on micromechanical modeling of unidirectional composites are reviewed.

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Section: Multi-scale Computational Homogenizationmentioning

confidence: 99%

Micromechanical modeling of the mechanical behavior of unidirectional composites – A comparative study

Heidari-Rarani

Bashandeh-Khodaei-Naeini

Mirkhalaf

2018

Journal of Reinforced Plastics and Composites

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“…The interface behavior of asphalt mixtures under the action of moisture is usually evaluated by macro-indicators such as the crack strength and spalling rate [12][13][14][15]. In addition, some scholars have used microcharacterization technology to study the asphalt mixture, including the surface morphology, structure, mechanical properties and other microproperties of the material [16][17][18][19][20]. Molecular simulation [21,22] is a computer numerical simulation test, which is not limited by the detection means, specimen preparation or other conditions.…”

Section: Introductionmentioning

confidence: 99%

A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface

2022

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In order to study the influence of moisture on the interface of crumb rubber–asphalt (CR) mixture, the interface bonding performance and crack resistance of a crumb rubber–asphalt mixture under dry and wet conditions were studied at three scales. At the macroscale, the characteristics of medium temperature fatigue cracking and low temperature fracture were studied by semi-circular bending tensile test (SCB) on the example of digital image correlation (DIC) technique. At the microscale, the surface energy of CR with basalt and limestone was measured using the contact angle measurement test, and then the adhesion work was calculated and analyzed. At the molecular scale, the model of CR, the model of basalt representative mineral (augite) and limestone representative mineral (calcite) were studied by molecular dynamics simulation. The relationship between these three scales was further explored to reveal the mechanism of the damage of moisture on the interface deterioration of the CR mixture. The results show that moisture has a certain effect on the interface of the CR mixture, which is characterized by macroscopically reducing the crack resistance of the asphalt mixture, microscopically reducing the adhesion ability between the asphalt and the aggregate and weakening the interaction between the asphalt and aggregate molecules at the molecular scale. Molecular dynamics can accurately simulate the deterioration of micro asphalt-aggregate adhesion under the damage of moisture. The decrease in microadhesion leads to the decrease in the crack resistance of the macro-CR mixture.

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“…aggregate particles or air voids embedded in the mortar phase. For instance, recent applications (Heidari-Rarani and Bashandeh-Khodaei-Naeini, 2018;Yilmaz and Molinari, 2017) consider the modeling of rocks within the mortar phase, modeling aggregates as two or three-dimensional ellipses or spheres, and make use of the theory of cohesive zones to model fracture. Others present a detailed scanning and modeling of air voids (Han et al, 2018) and apply a crack phase field model to study the development of damage.…”

Section: Introductionmentioning

confidence: 99%

Spatially random modulus and tensile strength: Contribution to variability of strain, damage, and fracture in concrete

Castillo

Nguyen

Niiranen

2021

International Journal of Damage Mechanics

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This paper explores the computational modeling of nonlocal strain, damage, and fracture in concrete, considering the isolated contribution of two random, spatially variable properties related to the fracture process: Young’s modulus (E) and tensile strength (ft). Applying a continuum damage model, heterogeneous specimens of concrete with random and spatially varying E or ft were found to produce substantial differences when contrasted with traditional homogeneous (non-random) specimens. These differences include variable and uncertain strain and damage, wandering of the failure paths, and differing (sometimes lower) peak forces, i.e. increased probabilities of failure in the heterogeneous specimens. It is found that ft variability contributes more (from 1.7 to up to 4 times more, depending on the parameter) to the overall performance variability of the concrete than E variability, which has a comparatively lower contribution. Performance is evaluated using (1) force-displacement response, (2) individual, average, and standard deviation maps of non-local strain and damage, (3) fracture paths and strain and damage values along the fractures. The modeling methodology is illustrated for two specimen geometries: a square plate with a circular hole, and an L-shaped plate. The computational results correlate well with reported experimental data of fracture in concrete specimens.

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Micromechanics based damage model for predicting compression behavior of polymer concretes

Cited by 25 publications

References 44 publications

Micromechanical modeling of the mechanical behavior of unidirectional composites – A comparative study

Micromechanical modeling of the mechanical behavior of unidirectional composites – A comparative study

A Multiscale Study of Moisture Influence on the Crumb Rubber Asphalt Mixture Interface

Spatially random modulus and tensile strength: Contribution to variability of strain, damage, and fracture in concrete

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