Mechanical performance of fractal-like cementitious lightweight cellular structures: Numerical investigations

Nguyen‐Van, Vuong; Wu, Changlang; Vogel, Frank; Zhang, Kevin; Nguyen‐Xuan, H.; Tran, Phuong

doi:10.1016/j.compstruct.2021.114050

Cited by 29 publications

(7 citation statements)

References 33 publications

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“…In other studies, [26][27][28], although not the same lattice structure, tensile stress concentration which led to further cracking was also found to be present on the compressed cementitious lattice materials. This is expected in cementitious lattice materials, due to the quasi-brittleness of the cementitious constituent material.…”

Section: Introductionmentioning

confidence: 60%

Towards Understanding Deformation and Fracture in Cementitious Lattice Materials: Insights from Multiscale Experiments and Simulations

Xu¹,

Gan²,

Chang³

et al. 2022

SSRN Journal

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Section: Introductionmentioning

confidence: 60%

Towards Understanding Deformation and Fracture in Cementitious Lattice Materials: Insights from Multiscale Experiments and Simulations

Xu¹,

Gan²,

Chang³

et al. 2022

SSRN Journal

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“…No supporting works in the literature are available on the mechanical influence of this type of fractal-like cavity to corroborate the results obtained. However, some research work verified that structural components topologically optimized with fractal geometries gained significantly in terms of load-bearing capacity [50,51]. The damage level of the brick model would seem to be less affected by the cavities' geometry.…”

Section: Fea-based Mechanical Analysismentioning

confidence: 99%

Finite Element Multi-Physics Analysis and Experimental Testing for Hollow Brick Solutions with Lightweight and Eco-Sustainable Cement Mix

et al. 2022

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Combining eco-sustainability and technological efficiency is one of the “hot” topics in the current construction and architectural sectors. In this work, recycled tire rubber aggregates and acoustically effective fractal cavities were combined in the design, modeling, and experimental characterization of lightweight concrete hollow bricks. After analyzing the structural and acoustic behavior of the brick models by finite element analysis as a function of the type of constituent concrete material (reference and rubberized cement mixes) and hollow inner geometry (circular- and fractal-shaped hollow designs), compressive tests and sound-absorption measurements were experimentally performed to evaluate the real performance of the developed prototypes. Compared to the traditional circular hollow pattern, fractal cavities improve the mechanical strength of the brick, its structural efficiency (strength-to-weight ratio), and the medium–high frequency noise damping. The use of ground waste tire rubber as a total concrete aggregate represents an eco-friendlier solution than the ordinary cementitious mix design, providing, at the same time, enhanced lightweight properties, mechanical ductility, and better sound attenuation. The near-compliance of rubber-concrete blocks with standard requirements and the value-added properties have demonstrated a good potential for incorporating waste rubber as aggregate for non-structural applications.

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“…The third-order rhombus and cylindrical cavity fractal elastic stiffness was 50% and 80% higher than the third-order square cavity structure. Nguyen-van et al [8] investigated many orders of fractals under uniaxial compression loading. They compared three orders of fractals of the square cavity and found that structures with large porosity are highly brittle.…”

Section: Introductionmentioning

confidence: 99%

Effective thermo-electro-mechanical properties of Menger sponge-like fractal structures: a finite element study

et al. 2023

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Menger sponges are hierarchical structures with tunable mechanical and electrical properties. In this work, different orders (0th, 1st, 2nd and 3rd) of hierarchical structures were studied for their effective properties by square, circular and hexagonal-shaped cavities. The elastic modulus, Poisson’s ratio, thermal and electrical conductivities were investigated as a functions of the density. The variation of normalized parameters with normalized density for square, cylindrical, and hexagonal-shaped cavities was used to obtain the empirical relations. The normalized specific modulus and Poisson’s ratio were validated using available analytical models for all cavities. The normalized Poisson’s ratio, thermal conductivity and electrical conductivity decreased with a reduction in the effective density. The effect of a different cavity (square, cylindrical and hexagonal) on the Menger sponge's mechanical and electrical behaviour shows variation after the effective density falls below 0.8. Menger sponge with a square cavity shows the maximum decrement in thermal and electrical conductivity among other cavities with increasing order of structure. Menger sponge with hexagonal cavity consists of least reduced normalized thermal and electrical conductivity with decreasing effective density. An increment in the order of fractals leads to a near-zero value for Poisson’s ratio. These structures can be used for medical, aerospace, and industrial applications according to the properties required in different applications.

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Mechanical performance of fractal-like cementitious lightweight cellular structures: Numerical investigations

Cited by 29 publications

References 33 publications

Towards Understanding Deformation and Fracture in Cementitious Lattice Materials: Insights from Multiscale Experiments and Simulations

Towards Understanding Deformation and Fracture in Cementitious Lattice Materials: Insights from Multiscale Experiments and Simulations

Finite Element Multi-Physics Analysis and Experimental Testing for Hollow Brick Solutions with Lightweight and Eco-Sustainable Cement Mix

Effective thermo-electro-mechanical properties of Menger sponge-like fractal structures: a finite element study

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