Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"cellular materials"”.
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The elastic and plastic behaviour of cellular materials
Cellular materials are widespread. Some, like wood and bone, occur in nature, while others, like polymeric foams, are manmade. Because of their cellular structure, they have unusual mechanical properties: they can be stiff, yet light, and they are capable of absorbing large deflections and thus …
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Additively Manufactured Metallic Cellular Materials for Blast and Impact Mitigation
… facilitates the design and fabrication of new cellular materials for blast and impact mitigation, where the performance is heavily influenced by geometric and material sensitivities. Design of such materials requires an understanding of the relationship between the additive manufacturing …
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Modeling viscoelastic cellular materials for the pressing of wood composites
With the large number and diversity of materials available today, the ability of the manufacturer to control properties is critical for the success of a product in the market. Although we have little or no control over the engineering properties of solid wood, the potential for the design of …
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From Micro- to Nano-porous Cellular Materials with Layered 2D Microstructure
… to studying the unique properties of 2D materials such as graphene, with advancements in both the material quality and scale of mechanical exfoliation and chemical vapour deposition (CVD) methods. These emergent 2D materials have recently been engineered as the cell walls in …
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Lightweight concrete : investigations into the production of variable density cellular materials
… work attempts to develop methods for creating a cellular lightweight concrete with variable density that can be cured at room temperature. Most aerated concretes traditionally require high temperature and high pressure curing; the goal of this research is to create a lower embodied energy product …
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A Process for Manufacturing Metal-Ceramic Cellular Materials with Designed Mesostructure
… to create metal matrix composites with complex cellular geometries. The novel manufacturing method uses two distinct additive manufacturing processes: i) fabrication of patternless molds for cellular metal castings and ii) printing an advanced cellular ceramic for embedding in a metal matrix. …
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Elastic properties of architectured cellular materials and biological materials (equine hoof wall)
… two main topics: the mechanical behavior of cellular materials based on triply periodic minimal surfaces (TPMS) and the analytical modeling of the elastic response of a horse hoof wall. TPMS structures have smooth surfaces with no sharp corners making them promising candidates for superior …
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The use of cellular materials to alleviate the damage from blast-induced fragments
This study aims to understand how different cellular materials mitigate the damage that is caused by a blast‐induced fragment. In the experimental arrangement, a front plate is subjected to localised blast load to release a “controlled” fragment (cap) to impact a similar plate positioned 190mm …
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On the Rheology of Soft Cellular Materials, An Experimental Investigation of the Microstructure and Rheology of a Novel Tissue-Mimic Material
… mechanics of biological development, in which cellular adhesion and membrane tension have emerged as key determinants of the mechanical properties of tissues, this thesis is a study of the rheology of a synthetic tissue-mimic material made from functionalised giant unilamellar lipid vesicles, …
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Multiscale Impact Mechanics of Additively Manufactured Periodic Cellular Solids
Cellular materials have superior weight-specific properties, including energy absorption (EA) capabilities, as compared to solid, monolithic materials. Regular periodic lattices, a subset of cellular materials, are of increasing interest for their repeatable and customizable behavior, particularly …
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Computational and experimental analyses and optimization of architectured materials
New materials with enhanced properties are of high scientific and industrial interests. Researchers have used materials that are nature-inspired or bioinspired and developed optimization frameworks to come up with such materials. This study presents novel cellular materials (CMs) based on triply …
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Digital cellular solids : reconfigurable composite materials
Digital materials are comprised of a small number of types of discrete physical building blocks, which assemble to form constructions that meet the versatility and scalability of digital computation and communication systems. This work seeks to demonstrate the applicability of a digital material …
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Development of porous delivery systems for oral drug and vaccine administration
As porous materials (polymers, metals and ceramics) have many interesting physical and chemical properties, they have widespread applications in nearly every technology sector. Chapter 1 described the main biomedical application of cellular materials: the use of porous ceramics, polymers and/or …
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Investigations of flakeboard mat consolidation
… flakeboard mat can be considered to be that of a cellular material, the properties of which are governed by the cellular geometry, or arrangement of cells, and the properties of the solid cell wall material. A method for quantifying the cellular structure of a wood flake mat was developed and …
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Experimental investigation and constitutive modeling of metallic honeycombs in sandwich structures
… characterization of the mechanical behavior of cellular materials. Using this device, the macroscopic phenomenology and the underlying microstructural deformation mechanisms of thin-walled aluminum honeycomb have been studied experimentally for combined out-of-plane shear and normal loading. …
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A numerical & experimental investigation into size effects within loaded additively manufactured cellular solids
The behaviour of heterogeneous materials when loaded cannot be adequately described by classical elasticity as it doesn't account for the presence of internal length-scales. Higher order theories such as micropolar elasticity may be more appropriate, though the additional elastic constants required …
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The effect of electrical processing on mass transfer and mechanical properties of food materials
… electrical processing on mass transfer in food materials was studied by designing and performing experiments that allowed the visualisation of: the effect of moderate electrical fields (MEF \(\leq\)1000V cm\(^{-1}\)) on mass transfer in cellular materials; the effect of MEF on mass transfer of …
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Thermodynamic and topological characterization of living systems
… biophysical systems at single-cell and subcellular resolution, from bacterial communities and tissues to intra-cellular signaling and expression dynamics of genes. Despite such progress in data collection, major theoretical challenges remain to find structure and organizing principles in …
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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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