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 23 for “"cellular solids"”.
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Digital cellular solids : reconfigurable composite materials
… of a digital material approach in designing new cellular materials and methods for assembly of structures with static reconfigurability. The science of cellular solids has enabled the widespread use of lightweight materials to meet important engineering needs, such as passive energy absorption, …
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Finite element analysis of Voronoi cellular solids
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Mechanical Design of Selected Natural Ceramic Cellular Solids
… structure and mechanical properties of natural cellular solids such as wood and trabecular bone have been extensively studied in the past, the structural design and underlying deformation mechanisms of natural cellular solids with very high mineral contents (> 90 wt%), which we term as natural …
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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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Manufacture of cellular solids using natural fibre reinforced composites
This thesis explains the manufacturing of recyclable, eco-friendly composites and their fabrication into hollow cores. The composites have been manufactured using compression moulding and extrusion techniques; each representing batch manufacturing and continuous manufacturing respectively. A …
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Fabrication and Compressive Behavior of Corrugated Aramid-Epoxy Cellular Solids
<p>Cellular solids are materials whose base material does not always occupy the entire solid fraction available. A number of cellular solids can provide blast protection and absorb impact energy, but few perform well resisting blunt object (ballistic) penetration. In this thesis, a method is …
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Effective properties of magneto-electro-elastic two-dimensional cellular solids
Two-dimensional cellular solids composed of magneto-electro-elastic (MEE) materials were studied using the finite element method (FEM). A MATLAB code was written to implement field models to determine the effective properties for this cellular solid including elastic, piezoelectric, piezomagnetic, …
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Fabrication and Compressive Yield Strength of Open Cell Corrugated Cellular Solids
… yield strength of open cell corrugated cellular solids made from type 304 stainless steel. Test samples were made by corrugating woven wire meshes, then laminating these in a high temperature argon environment. Mesh sizes ranging from 9.5 pore/cm (24 pore/in) to 31.5 pore/cm (80 pore/in) …
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A numerical & experimental investigation into size effects within loaded additively manufactured cellular solids
… with decreasing size at scales approaching the cellular microstructure. Thus, at the microstructural level, size and scale becomes an important consideration. Hence, materials which appear homogeneous at a large scale may be heterogeneous at smaller scales when overall size approaches that of …
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Design and fabrication of high power microbatteries and high specific strength cellular solids from bicontinuous microporous hierarchical materials
… power density as well as hierarchical cellular solids with controllable modulus and high specific strength. Self-assembly, electrodeposition and microfabrication enable the fabrication of microbatteries with hierarchical electrodes. The three-dimensional bicontinuous interdigitated …
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Passive biomimetic actuators : the role of material architecture
… systems based on lignified, low-swelling, cellular solids enclosing a high-swelling cellulosic phase. This is the case of the Delosperma nakurense seed capsule, in which a specialized tissue promotes the reversible opening of the capsule upon wetting. This tissue has a diamond-shaped …
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Design and large deformation response of additively-manufactured shell-lattices
Open-cell cellular solids are porous structures with a large variety of applications, from energy absorption to medical engineering. In an attempt to identify isotropic configurations with high low and large strain mechanical properties, detailed numerical simulations are conducted on a wide range …
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Finite element based micromechanical modeling of periodic composite microstructures
The mechanical behavior of cellular solids, including stiffness and strength, can be tuned by tailoring the underlying geometry and material constituents of the microstructure. Here the effect of key parameters on the compressive deformation response of composite truss-based cellular solids was …
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The influence of microporosity on the mechanical properties of bulk, scaffold, and composite scaffold biphasic calcium phosphate
… and share stress-strain behavior similar to cellular solids. Fracture in monolithic and composite scaffolds occurred by crack propagation at rod junctions along the scaffold length and crack propagation along 45 degree planes, respectively.
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Field-responsive ('Smart') fluids for advanced automotive applications
… and energy absorption characteristics of cellular solids. The mechanical properties of 'dry' and field-responsive fluid-impregnated cellular solids have been determined using Texture Analyzer modified with a custom-built attachment. Foams impregnated with MR fluids have shown a tremendous …
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Design and analysis of active fluid-and-cellular solid composites for controllable stiffness robotic elements
… Specifically, meso-scale composites--composed of cellular solids impregnated with active fluids-were be designed to have controllable stiffness to take the form of a continuous body of a soft robot. This represents an improvement compared to past efforts in soft robotics, which often involved …
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Mechanical properties of collagen-based scaffolds for tissue regeneration
… and mechanical properties. Models for cellular solids suggest that the overall mechanical properties of the scaffold can be increased by either increasing the mechanical properties of the solid from which the scaffold is made or by increasing the relative density of the scaffold. In an …
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Mechanical Characterization of Selectively Laser Melted 316L Stainless Steel Body Centered Cubic Unit Cells and Lattice of Varying Node Radii and Strut Angle
… developed, based on the Gibson-Ashby model of cellular solids, as well as a finite element model. Numerical results did not agree well with the experimental results, indicating that the droop observed on the structures significantly affects the mechanical properties of the overall structure. …
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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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Energy Absorption and Dynamic Behaviors of Architectured Interpenetrating Phase Composites
… porous structure comprising two interpenetrating cellular solids. Through tension testing, we demonstrate that combined interphase action results in damage delocalization and an order-of-magnitude improvement in strain-to-failure over the fully dense base material. These experiments validate a …
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