In-Plane mechanical and failure responses of honeycombs with syntactic foam cell walls

Pagliocca, Nicholas; Youssef, George; Koohbor, Behrad

doi:10.1016/j.compstruct.2022.115866

Cited by 10 publications

(8 citation statements)

References 50 publications

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“…Similarly, lightweight and hyperelastic metallic and polymeric foams are used to dissipate impact energy due to their superior energy absorption capacity [24,25]. Since their stiffness and hardness are relatively smaller, they commonly possess a lower but longer stress plateau stage than the lattice materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Compressive Behavior of Hybrid Polyurethane(PU)-Foam-Filled Hyperbolic Chiral Lattice Metamaterial

Hou

et al. 2023

Polymers

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In this study, a novel hybrid metamaterial has been developed via fulfilling hyperbolic chiral lattice with polyurethane (PU) foam. Initially, both the hyperbolic and typical body-centered cubic (BCC) lattices are fabricated by 3D printing technique. These lattices are infiltrated in a thermoplastic polyurethane (TPU) solution dissolved in 1,4-Dioxane, and then freeze casting technique is applied to achieve the PU-foam-filling. Intermediate (IM) layers possessing irregular pores, are formed neighboring to the lattice-foam interface. While, the foam far from the lattice exhibits a multi-layered structure. The mechanical behavior of the hybrid lattice metamaterials has been investigated by monotonic and cyclic compressive tests. The experimental monotonic tests indicate that, the filling foam is able to soften the BCC lattice but to stiffen the hyperbolic one, further to raise the stress plateau and to accelerate the densification for both lattices. The foam hybridization also benefits the hyperbolic lattice to prohibit the property degradation under the cyclic compression. Furthermore, the failure modes of the hybrid hyperbolic lattice are identified as the interface splitting and foam collapse via microscopic analysis. Finally, a parametric study has been performed to reveal the effects of different parameters on the compressive properties of the hybrid hyperbolic lattice metamaterial.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Compressive Behavior of Hybrid Polyurethane(PU)-Foam-Filled Hyperbolic Chiral Lattice Metamaterial

Hou

et al. 2023

Polymers

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“…[11,12] Like its predecessors, this scientific and industrial paradigm shift hinges on the ongoing development of hybrid and composite materials in different configurations, shifting the focus to reinforced cellular, syntactic solid structures such as honeycombs. [13] The ubiquity of cellular solids in engineering applications stems from the objective of mimicking nature-crafted and optimized structures in natural and biological materials, providing tunable geometries and properties, achieving unprecedented quasi-static and dynamic performances, and promising pathways to multifunctionality. The latter naturally leverages the strategically configured unoccupied space within ordered cellular solids to induce functionalities other than load-bearing and structural stability, [14] such as fluid flow, heat transfer, and magnetic shielding.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…For example, Pagliocca et al elucidated the load‐bearing and energy absorption performances of spatially‐graded hexagonal honeycombs from hollow glass spheres reinforced epoxy resin, which were fabricated conventionally using the molding process. [ 13 ] Pagliocca et al showed that spatial gradation improved the energy absorption capacity of these syntactic foam structures but compromised the overall strength. [ 13 ] Furthermore, they showed that the global ductility (quantified by the global failure strain) benefited from density gradation compared to uniform density counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…[ 13 ] Pagliocca et al showed that spatial gradation improved the energy absorption capacity of these syntactic foam structures but compromised the overall strength. [ 13 ] Furthermore, they showed that the global ductility (quantified by the global failure strain) benefited from density gradation compared to uniform density counterparts. [ 13 ] The promising outcomes from the study of Pagliocca et al postulated the significant potential of these structures and whether additive manufacturing using composite materials is possible.…”

Section: Introductionmentioning

confidence: 99%

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Structural Performance of Additively Manufactured Composite Lattice Structures: Strain Rate, Cell Geometry, and Weight Ratio Effects

Singh,

Ngo,

Huynh

et al. 2023

Adv Eng Mater

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The proliferation of ordered cellular structures in industrial and technological applications is justified by their superior mechanical performance, including tunable energy absorption strategies and potential multifunctionality. This research evaluates the mechanical response of composite lattice structures fabricated using vat photopolymerization additive manufacturing process and printable particulate composite materials. Several generations of modified printable resins are prepared by hybridizing flexible resin with varying glass microballoons reinforcement weight percentages. Multifaceted characterization regiments highlight the process–property–performance interrelationship by submitting printed composite structures to quasi‐static and impact‐loading scenarios combined with digital stills and high‐speed photography, respectively. Image analyses of optical and scanning electron micrographs quantify the dimensional accuracy of the composite lattice structures with cylindrical and hexagonal cellular geometries. The mechanical characterization uncovers the effect of cell geometry and reinforcement on the global structural behavior, eliciting differences in load‐bearing capacity, local strain developments, and structural densification. Exploratory digital image correlation supports the global structural deformations, revealing their relationship with the developed local strain state within the unit cells. The outcomes of this research elucidate the effect of strain rate, unit cell geometry, and reinforcing ratios on the structural performance of composite lattice structures at the macro‐ and microstructure levels.

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Repair of Damaged Fiber-Reinforced Polymer Composites with Cold Spray

Anni,

Kaminskyj,

Uddin

et al. 2024

J Therm Spray Tech

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In-Plane mechanical and failure responses of honeycombs with syntactic foam cell walls

Cited by 10 publications

References 50 publications

Investigation on the Compressive Behavior of Hybrid Polyurethane(PU)-Foam-Filled Hyperbolic Chiral Lattice Metamaterial

Investigation on the Compressive Behavior of Hybrid Polyurethane(PU)-Foam-Filled Hyperbolic Chiral Lattice Metamaterial

Structural Performance of Additively Manufactured Composite Lattice Structures: Strain Rate, Cell Geometry, and Weight Ratio Effects

Repair of Damaged Fiber-Reinforced Polymer Composites with Cold Spray

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