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 18 of 18 for “"rigid substrate"”.
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Experiments, Modelling, and Simulations for a Gel Bonded to a Rigid Substrate
… by stress concentration on the interface with a rigid substrate, which is useful in medical device design. Using polyacrylamide gel as a model system, the configuration of a thin rectangular polyacrylamide gel covalently bonded on the top surface to a glass substrate after reaching swelling …
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Densification Behavior of Ceramic and Crystallizable Glass Materials Constrained on a Rigid Substrate
… constraint, both internal and external, such as rigid particles, reinforcing fibers and substrates to which the porous body adheres. The densification behavior of zinc oxide and cordierite-base crystallizable glass constrained on a rigid substrate was studied to add to the understanding of the …
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Selective assembly in deformable systems using templated assembly by selective removal
… of deformable polymer microspheres on patterned rigid substrates using Templated Assembly by Selective Removal (TASR). Also presented is a quantitative model for predicting the successful self-assembly of deformable materials using TASR. Successful assembly of silica microspheres using TASR on a …
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ULTRA-HIGH STRAIN RATE CONSTITUTIVE MODELING OF PURE TITANIUM USING PARTICLE IMPACT TEST
… commercially pure titanium to ~100 m/s towards a rigid substrate and record their deformation upon impact in real time. We also conduct finite element modeling of the experimentally recorded impacts using two constitutive equations: Johnson-Cook and Zerilli-Armstrong. We show that titanium …
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Stimulation of angiogenesis through collagen gel by applying shear stress and interstitial flow
… cells to be seeded on collagen gel rather than a rigid substrate to more closely mimic in vivo environment. A shear stress of I Pa was applied to the endothelial cells for a duration of 36 hours. Results show that after flow was initiated for this duration, a change in shape of the endothelial …
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A Preliminary discourse on Adhesion of Nanofibers Derived from Electrospun Polymers
… of adhesion between electrospun membrane and rigid substrate. Poly(vinylidene fluoride) (PVDF) were electrospun with an average fiber diameter of 333 ± 59 nm. Commercial cardboard with inorganic coating was used to provide a model substrate for adhesion tests. In SLBT, the elastic response …
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Fabrication and evaluation of a collagen-based fiber-gel three-dimensional construct for peripheral nerve repair
… I collagen. Wet-spun collagen fibers serve as a rigid substrate to reinforce the gel while facilitating axon growth cone advancement along a polarized direction. In this study, the emphasis is to characterize the mechanical stability, thermal properties, and swelling response of the collagen …
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The Effect of Adhesion on the Contact of an Elastica with a Rigid Surface
… allowing the strip to make contact with a flat, rigid, horizontal surface. Two adhesion models are investigated. First, a JKR-type analysis, which examines the effect of adhesion forces that exist within the area of contact between the elastica and the rigid surface, is considered. Various values …
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The harmonic excitation of a cylindrical bubble pinned to a plane surface: flow field and oscillation dynamics
… of a hemicylindrical gas bubble pinned to rigid substrate to an imposed oscillatory far field pressure, and subsequently describe the resulting steady flow that results in the fluid in the exterior of such a bubble. We first derive an analytical expression for the allowable shape …
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Finite Element Analysis of Probe Induced Delamination of a Thin Film at an Edge Interface
… element analyses of a thin film bonded to a rigid substrate that is shaft-loaded at its free edge. This geometry is of interest because it simulates a probe test that has proven to be useful in characterizing the adhesion of thin, microelectronic coatings bonded to silicon wafers. Preliminary …
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Coiling of elastic rods on rigid substrates
… the deployment of a thin elastic rod onto a rigid substrate and study the resulting coiling patterns. In our approach, we combine precision model experiments, scaling analyses, and computer simulations towards developing predictive understanding of the coiling process. Both cases of …
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Bouncing and walking droplets : towards a hydrodynamic pilot-wave theory
… this model in the context of a drop impacting a rigid substrate, and demonstrate its accuracy by comparison with existing numerical and experimental data. We then extend the model to the case of impact on a liquid substrate, and apply it to rationalize the dependence of the bouncing droplet's …
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Lamination of Inverted Organic Photovoltaics and Associated Physical Properties
… part of the solar cell is deposited onto a rigid substrate, and the rest is deposited onto a flexible one. The two substrates are pressed together under heat to complete the device. Laminated devices are shown to perform as well or better than those made with standard fabrication methods, …
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Simulations of Indentation at Continuum and Atomic levels
… indentation tests on thin layers bonded to rigid substrates. Accordingly, we first use the Stroh formalism to provide an analytical solution for generalized plane strain deformations of a linear elastic anisotropic layer bonded to a rigid substrate, and indented by a rigid cylindrical …
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Optimization and characterization of Organic Solar cells based on Regio-P3HT and C66-PCBM blends
… cells were done on both glass and aluminium substrates. The aluminium provided a flexible substrate for the cells whilst the glass provided a rigid substrate and acted as a control. The thin films for the solar cells were deposited by means of the spin coating method. The integrity of the …
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Optimization and characterization of Organic Solar cells based on Regio-P3HT and C66-PCBM blends
… cells were done on both glass and aluminium substrates. The aluminium provided a flexible substrate for the cells whilst the glass provided a rigid substrate and acted as a control. The thin films for the solar cells were deposited by means of the spin coating method. The integrity of the …
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Elastocapillarity: adhesion and large deformations of thin sheets
… sheets that come into contact with an underlying substrate. The focus of this work is on the interplay between material and geometric properties of a system and how this interplay determines the equilibrium states of sheet and substrate, particularly in the regime of geometrically nonlinear …
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Novel waveguides for terahertz quantum cascade lasers
… elements on chip as it is more flexible than the rigid, substrate-based MM waveguide fabrication. Thirdly, another novel concept of a THz QCL waveguide is presented, which employs etched pockets in the substrate directly below the active region. The air pockets allow for reducing the bottom …