Role of cell regularity and relative density on elastoplastic compression response of 3-D open-cell foam core sandwich structure generated using Voronoi diagrams

Sotomayor, Oscar; Tippur, Hareesh V.

doi:10.1016/j.actamat.2014.06.051

Cited by 48 publications

(33 citation statements)

References 33 publications

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“…Porous structures such as honeycomb [1], crystalline lattices [2], Voronoi foam [3], and gyroid lattices [4], all of which are manufactured using selective laser melting (SLM), have significant advantages: they are lightweight, they can reduce the consumption of materials, and they allow for mechanical property adjustment. These structures are widely used in aerospace engineering [5], product repair, tissue engineering [6], and as filling structures in addition to saving processing time and reducing powder consumption.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical behaviours and mass transport properties of bone-mimicking scaffolds consisted of gyroid structures manufactured using selective laser melting

Tang

Feng

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

174

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Section: Introductionmentioning

confidence: 99%

“…The material the present study used is 316L stainless steel (316L), which is a widely used material in SLM. The elastic modulus of 316L is around 206 GPa, the yield strength is around 267.2 MPa, and the density is 7.98 g/cm 3 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviours and mass transport properties of bone-mimicking scaffolds consisted of gyroid structures manufactured using selective laser melting

Tang

Feng

et al. 2019

Journal of the Mechanical Behavior of Biomedical Materials

174

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“…Recently, the Voronoi tessellation method was used to create a 3D foam model. Some studies showed that simulations of three-dimensional Voronoi tessellation models can be used to understand the direct relationship between mechanical properties and the regularity parameter [34,35]. Schladitz et al [36] reviewed the theoretical background for 3D imaging by using microcomputed tomography, in particular estimating the intrinsic volumes and their densities from discretized data and models for random spatial tessellations.…”

Section: Introductionmentioning

confidence: 99%

Influence of Porosity on the Mechanical Behavior during Uniaxial Compressive Testing on Voronoi-Based Open-Cell Aluminium Foam

et al. 2019

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We have studied an application of the Voronoi tessellation method in the modeling of open-cell aluminium foam under uniaxial compressive loading. The Voronoi code was merged with computer-aided design (CAD) for converting the polyhedral model into an irregular open-cell cellular structure to create porous samples for compression testing simulations. Numerical simulations of the uniaxial compression uniformly over the upper surface of the sample in the z-axis direction at a constant 20 N load was realised. Samples with three different porosities (30%, 60% and 80%) were studied. A nonlinear elasto-plastic material model with perfect plasticity, without hardening, based on the von Mises yield criterion was applied below 10% strain. Corresponding stress–strain curves were observed and the influence of porosity on deformation mechanism was discussed. Samples with higher porosity exhibited significantly higher normal stress under the same load, and increased stress plateaus. An increase of porosity produced an increase of both compressive and tensile stresses and struts exhibited complex stress fields. Voronoi-based modeling was in accordance with experimental results in the literature in the case of the quasi-static condition and linear elastic region (below 1% strain). Further study is necessary to enable the simulation of real dynamic behaviour under all deformation regimes by using the Voronoi tessellation method.

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“…Based on finite element analysis, elastic properties and Poisson's ratio of anti‐chiral structures with stochastic distributions of circular node sizes are investigated systematically . Influences of cell irregularity on the compression mechanical behaviors of 3D open‐cell foam are studied in the elastic and plastic deformation regimes, where Voronoi stochastic generation of randomness of the microstructure are employed for geometrical generation. Based on parametric analysis, effects of the cell geometry and relative density over the global stiffness, equivalent in‐plane Poisson's ratio and shear modulus of the two types of Voronoi honeycomb structure are studied systematically .…”

Section: Introductionmentioning

confidence: 99%

Effects of Disordered Circular Nodes Dispersion and Missing Ligaments on the Mechanical Properties of Chiral Structures

Niu

Liang

et al. 2019

Physica Status Solidi (b)

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Auxetics with negative Poisson's ratio (NPR) can expand dimensions along the direction perpendicular to the tensile direction, such as rigid rotation, reentrant and chiral structures, etc. The mechanical performances of chiral metastructures are closely related to internal defects and interactions between defects. In this paper, two types of irregular chiral structures with Gaussian dispersion of circular node positions and missing ligaments are designed, namely: antitetrachiral metastructure and tetrachiral hybrid metastructure. These two types of chiral metastructures are characterized by node radius, ligament thickness, ligament length, the circular node center dispersion range, and missing ligament percentages. Effects of random node distribution range and cell wall missing percentage on the elastic modulus and Poisson's ratio of chiral metastructures are investigated through experimental tests and finite element (FE) simulation systematically. Through dimensionless analysis, it is found that ligament thickness has remarkable influence on the negative Poisson's ratio. Effect of missing ligament on the mechanical properties of the structure is greater than effect of random node center dispersion. With the increase of ligament missing percentage, the resultant modulus of chiral metastructures decreases, and the corresponding NPR increases.

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Role of cell regularity and relative density on elastoplastic compression response of 3-D open-cell foam core sandwich structure generated using Voronoi diagrams

Cited by 48 publications

References 33 publications

Mechanical behaviours and mass transport properties of bone-mimicking scaffolds consisted of gyroid structures manufactured using selective laser melting

Mechanical behaviours and mass transport properties of bone-mimicking scaffolds consisted of gyroid structures manufactured using selective laser melting

Influence of Porosity on the Mechanical Behavior during Uniaxial Compressive Testing on Voronoi-Based Open-Cell Aluminium Foam

Effects of Disordered Circular Nodes Dispersion and Missing Ligaments on the Mechanical Properties of Chiral Structures

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