Strength properties of nanoporous materials: A 3-layered based non-linear homogenization approach with interface effects

Brach, Stella; Dormieux, Luc; Kondo, Djimédo; Vairo, Giuseppe

doi:10.1016/j.ijengsci.2017.03.001

Cited by 20 publications

(10 citation statements)

References 45 publications

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“…These changes were most pronounced in treatments contaminated with the highest zinc dose (900 Zn 2+ kg −1 soil DM). According to Brach et al ( 2017 ), the presence of nanopores in the molecular sieve supports interactions with the ions and molecules of chemical compounds. The above mechanism could be responsible for the observed increase in the counts of bacteria and actinobacteria and enzyme activity.…”

Section: Discussionmentioning

confidence: 99%

An Evaluation of the Effectiveness of Sorbents in the Remediation of Soil Contaminated with Zinc

Strachel

Wyszkowska

Baćmaga

2018

Water Air Soil Pollut

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Zinc exerts negative effects on soil and contributing to the degradation of soil ecosystems. New solutions for restoring healthy soil activity are therefore needed. The aim of this study was to evaluate the effectiveness of sorbents in the biological remediation of soil contaminated with zinc. A pot experiment was conducted on loamy sand. The tested plant was maize (Zea mays). Soil was contaminated with zinc chloride doses of 0, 100, 300, and 900 mg Zn2+ kg−1 DM soil (dry matter of soil). Alginate, biochar, sepiolite, calcined halloysite, and a molecular sieve were added to soil in amounts corresponding to 2.5% of soil weight to minimize zinc’s potentially toxic effects on the biological properties of soil. The application of zinc stimulated the proliferation of all analyzed microbial groups. Zinc exerted negative effects on the ecophysiological diversity (EP) of fungi and the activity of dehydrogenases, catalase, and acid phosphatase. The applied sorbents modified the microbiological and biochemical properties of soil. In zinc-contaminated soil, alginate, biochar, and molecular sieve increased the counts of organotrophic, oligotrophic, and actinobacteria. Sorbents were not highly effective in promoting fungal growth and exerted varied effects on the activity of soil enzymes. The molecular sieve stimulated the activity of all soil enzymes, excluding β-glucosidase. Alginate minimized the negative influence of zinc on dehydrogenases and acid phosphatase, and biochar—on catalase, sepiolite, and calcined halloysite —on acid phosphatase. By modifying the biological properties of soil, the tested sorbents contributed to an increase in maize yields and a decrease in zinc uptake by maize plants.

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Section: Discussionmentioning

confidence: 99%

An Evaluation of the Effectiveness of Sorbents in the Remediation of Soil Contaminated with Zinc

Strachel

Wyszkowska

Baćmaga

2018

Water Air Soil Pollut

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“…Dormieux and Kondo, 2010;Monchiet and Kondo, 2013). The strength properties of nanoporous materials have been considered (Morin et al, 2015;Brach et al, 2017), using a non-linear homogenization procedure based on a 3-layered description and including surface-stress effects by use of an imperfect-coherent interface model. Furthermore, a representative volume element investigation of size-effects on the yield surface of metals with dilute porosities has been carried out by Li and Steinmann (2006).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A homogenized model for size-effects in porous metals

Niordson

Tvergaard

2019

Journal of the Mechanics and Physics of Solids

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“…Due to the small length-scale involved, surface stresses are expected to arise at the matrix/inclusion interface [19,22,33]. Following [14] and later works [6,5,8], we account for the presence of such stress distributions by describing S(a) as a coherent imperfect interface obeying the Young-Laplace equilibrium equations…”

Section: Particulate Reinforced Nanocompositesmentioning

confidence: 99%

“…In these models, surface energies are believed to play an important role due to the high surface-to-volume ratio which has been numerically investigated by many authors among which one can mention [1,23]. On the other hand, non-linear homogenization models have been proposed mainly for nanoporous media [5,6,28]. As such, the present contribution aims at investigating the effective strength of composites made of a plastic matrix rein-forced by nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Effects of particles size on the overall strength of nanocomposites: Molecular Dynamics simulations and theoretical modeling

Lucchetta

Brach

Kondo

2021

Mechanics Research Communications

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We perform Molecular Dynamics simulations to investigate the strength properties of particulate reinforced nanocomposites. For a fixed reinforcement volume fraction, the effective strength increases as the inclusion size decreases. We further develop a kinematic limit analysis approach, which delivers theoretical estimates of the effective strength. The model is first assessed in the absence of size effects by comparison with data from available literature. An extension to nanocomposites is then proposed, accounting for the presence of surface stresses at the matrix/inclusion interface. Numerical data are used to calibrate the interfacial strength, which is found to be a size-dependent property.

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Strength properties of nanoporous materials: A 3-layered based non-linear homogenization approach with interface effects

Cited by 20 publications

References 45 publications

An Evaluation of the Effectiveness of Sorbents in the Remediation of Soil Contaminated with Zinc

An Evaluation of the Effectiveness of Sorbents in the Remediation of Soil Contaminated with Zinc

A homogenized model for size-effects in porous metals

Effects of particles size on the overall strength of nanocomposites: Molecular Dynamics simulations and theoretical modeling

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