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Showing 1 to 18 of 18 for “"Honeycombs"”.
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Experimental investigation and constitutive modeling of metallic honeycombs in sandwich structures
… orthotropic constitutive model for metallic honeycombs has been formulated and implemented into commercial finite element software. The good agreement of the model predictions with the experimental results encourages the use of this constitutive model for applications involving large plastic …
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Extruded Cellular Fly Ash Construction Materials
… 97 MPa (14,100 psi), and 8750 m for autoclaved honeycombs, and 1.32 g/cm$\sp3,$ 156 MPa (22,600 psi), and 12,000 m for sintered honeycombs. The SDR values obtained exceeded the SDR of construction-grade pine (6375 m).
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Effects of Defects on the Performance of Hierarchical Honeycomb Metamaterials Realized Through Additive Manufacturing
… using finite element analysis. Hierarchical honeycombs demonstrated more sensitivity to missing cell walls than regular honeycombs. On average, the axial elastic modulus decreased by 45% with 5.5% missing cell walls for regular honeycombs, 60% with 4% missing cell walls for first order …
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Hierarchical and size dependent mechanical properties of silica and silicon nanostructures inspired by diatom algae
… shells generally have a morphology resembling honeycombs within honeycombs, meshes, or corrugated folds, and are surprisingly tough when compared to bulk silica, which is one of the most brittle materials known. However, the reason for the enhanced mechanical properties has remained elusive. …
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Application of data-driven neural networks to bio-inspired lattice design and prediction of multiphysics solution fields
… on these tools, bio-inspired hierarchical honeycombs (BIHH) are developed by augmenting conventional hexagonal honeycombs with triangular, square, and circular variants, integrating smaller, closed topologies inspired by natural structures such as bamboo, beetles, and crab chelae. These …
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Mechanical behavior of dip-brazed aluminum sandwich panels
… square and triangular honeycomb cores. These honeycombs were made of perforated aluminum sheet of repeating diamond and hexagonal patterns. The sandwich panel assemblies were joined via dip brazing. Defects were introduced into some panels to quantify the effect on strength and stiffness. …
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The response of honeycomb sandwich panels to blast loads
… to characterise the face plates and the honeycombs. Four sandwich panel configurations are proposed and subjected to blast loading. The impulse is generated by detonating plastic explosives at a constant stand-off distance and measured using a ballistic pendulum. The impulse is varied by …
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Nondestructive evaluation for hybrid-composite girder bridges
… enclosed within an FRP shell, internal voids or honeycombs that may occur during concrete placement can go undetected. The research to be presented is focused on the application of nondestructive evaluation (NDE) technologies of thermography, ultrasonic testing, and acoustic emission testing to …
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Microtruss Design for Strength and Energy Absorption
… absorbers in literature, such as foams and honeycombs.
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Modeling the dynamic response of low-density, reticulated, elastomeric foam impregnated with Newtonian and non-Newtonian fluids
Engineering cellular solids, such as honeycombs and foams, are widely used in applications ranging from thermal insulation to energy absorption. Natural cellular materials, such as wood, have been used in structures for millennia. However, despite their extensive use, a comprehensive understanding …
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Estudo dos parâmetros biométricos de Melipona scutellaris Latreille, 1811 (HYMENOPTERA: APIDAE) em diferentes estações do ano no brejo paraibano
… the activity, thus bringing benefits to bees and honeycombs. The aim of this research was to select the hives with the best biometric parameters for the insertion of queens into recipient hives. The study was carried out at the Apiculture and Meliponiculture Research Center at the Center of …
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Hierarchical Carbon Structures for Advanced High Areal Capacity Lithium-Ion Battery Electrodes
… (LCHB) are proposed – the hierarchical CNT honeycombs help improve Li-ion diffusion, provide more electrically conductive pathways, increase electrochemically active surface area, and offer mechanical support. High aspect ratio (over 1000) CNT honeycomb backbones of over 1 mm tall are …
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A new class of auxetic lattices
… analysis with hexagonal, triangular and square honeycombs is also performed. We have present also experimental evidence that the new lattices can achieve a negative Poisson's ratio ν=-0.9931± 0.0025. Later we have extended our study to a three-dimensional model that can reproduce the same …
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Investigation of Polymer-Filled Honeycomb Composites with Applications as Variable Stiffness Morphing Aircraft Structures
… Previous research has shown that polymer filled honeycombs exhibit greater in-plane moduli greater than the infill or honeycomb alone, but there has been little research focused on understanding this behavior. Moreover, while most engineered cellular structures are comprised of symmetric and …
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Passive biomimetic actuators : the role of material architecture
… of only one non-convex cell. Compared to usual honeycombs, these lattices have kinked walls between neighbouring cells which offers a hidden length scale allowing large directed deformations. By comparing the area expansion in all lattices, we were able to show that less convex cells are prone …
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Catalytic combustion of methane with nanostructured barium hexaaluminate-based materials
… Nickel foams and fiber reinforced honeycombs demonstrated excellent thermal shock resistance; the latter were preferred for high-temperature operations since they would give rise to negligible pressure drops. In our catalytic combustor design, nanocrystalline PdO/Ce02-BHA was used …
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Design of Sandwich Structures
Failure modes for sandwich beams of GFRP laminate skins and Nomex honeycomb core are investigated. Theoretical models using honeycomb mechanics and classical beam theory are described. A failure mode map for loading under 3-point bending, is constructed, showing the dependence of failure mode and …