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.
Results
Showing 1 to 20 of 43 for “"open cell"”.
-
Processing and analysis of microcellular open-cell foams
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
-
Temperature dependent dynamic response of open-cell polyurethane foams
Polyurethane foams have many uses ranging from comfort fitting seats and shoes to protective inserts in helmets and sports equipment. This study aims to analyze the thermomechanical uniaxial compression behavior of two different polyurethane based foam helmet liner pads. These experiments were …
-
Fabrication and Compressive Yield Strength of Open Cell Corrugated Cellular Solids
… fabrication and compressive 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 …
-
A geometric study of liquid retention in open-cell metal foams
Open-cell metal foams show promise as an emerging novel material for heat exchanger applications. The high surface-area-to-volume ratio suggests increased compactness and decrease in weight of heat exchanger designs. However, the metal foam structure appears conducive to condensate retention, which …
-
Fluid dynamics and mass transfer in porous media: Modelling fluid flow and filtration inside open-cell foams
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Ceramic & Metallic Open Cell Foams for the Lean Methane Combustion Reaction: Exploring the Impact of Catalytic Supports
L'abstract è presente nell'allegato / the abstract is in the attachment
-
A skeleton-and-bubble model of elastic open-cell foams for finite element analysis at large deformations
We formulate a new unit-cell model of elastic open-cell foams. In this model, the conventional skeleton of open-cell foams is supplemented by fitting a thin-walled bubble within each cavity of the skeleton, as a substitute for the membranes that occlude the openings of the skeleton in elastic …
-
Structure-property relationships in extruded plastics foams
… to physical properties (i.e. density and open cell fraction) of foamed material occur, following the modification of melt viscosity by melt blending of polypropylene and high density polyethylene). The main object of this research project was to carry out a systematic examination of …
-
Impact sound insulation of flooring systems with polyurethane foam on concrete floors
… profile floating floors comprising flexible open cell polyurethane foam resilient layers have been developed. These systems are attractive for refurbishment projects since they can simply be placed on existing floors in order to improve their impact sound insulation whilst raising the …
-
FIRST-PRINCIPLES SIMULATIONS OF SOLID STATE BATTERY MATERIALS
… conduction pathways for the Li-ions predicted, open cell voltages calculated, and reactivity with lithium at the surface studied. The results for these materials provided insight into existing experimental data from the literature and made predictions for open cell voltages that had not yet been …
-
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 …
-
Unsteady Flow Behaviors Generated by Three-Dimensional Lattice Geometries as Measured by Laser Doppler Velocimetry
… or fluctuation level of the flow increases. Open cell foams and compact heat exchangers are two of the most common models applied for heat transfer augmentation. However, the small ligaments of open cell foams limit the heat conducted and smooth passages in compact heat exchangers cannot …
-
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 …
-
An active seating system for prevention of pressure sores
… uses vacuum and pressure in combination with an open-cell-foam-based cushion to perform pressure relief. Testing methods for the system were studied and developed. These methods allow a controlled and precise testing of seating systems. Prototype systems have also been produced and tested. …
-
Structure-Property Relationships of Tantalum Carbide Foams and Synthesis of an Interpenetrating Phase Composite
… applications. In addition, infiltrating an open-cell ceramic foam with a continuous second phase can create an interpenetrating phase composite (IPC), consisting of a three-dimensional reinforcement structure. One aspect of investigation within this study was the influence of foam pore/strut …
-
Metal metaphosphate complexes for redox flow batteries
… a dual-active-species redox flow battery with an open cell potential of 1.5 V. [PPN]₃[V(P₃Og)₂] can be oxidized and reduced within the stability window of acetonitrile and it is therefor a promising candidate for single-active-species redox flow battery applications. The difference in redox …
-
Effects of Reamer-Femoral Component Offset on Cement Mantle Penetration in Hip Resurfacing Arthroplasty
… of reamed femoral heads made from high-density open-cell reticulated carbon foam, cement penetration was assessed from cross-sections of the foam-implant unit. Increased offset was found to decrease the extent of cement over penetration from the dome and chamfer. Increased offset also yielded …
-
Enhanced comfort of seating systems through variable shape and compliance
… to manipulate the elastic/collapse properties of open-cell foam; effectively setting a maximum pressure at the human interface. Assuming appropriate auxiliary hardware, pumps, controllers, and sensors it would be appropriate to use this cushion as the basis of an actively controlled seating system.
-
Materials and coatings derived from the polymerizable ionic liquid surfactant 1-(2-Acryloyloxyundecyl)-3-methylimidazolium bromide
… - in IL-Br resulted in the formation of open-cell porous structures in several of these materials, which was confirmed by SEM.</p>
Page 1 of 3