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 128 for “"Straining"”.
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Flames in Straining Flows
In Chapt. 2, a model is proposed for flammability limits based on flame stretch that is applicable to upward propagation through lean methane/air mixtures in round tube. Predictions of the model are in good agreement with experiment.
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Tunable mechanical bandgaps in elastic metamaterials: Patterning, straining, and spatiotemporal modulation
Metamaterials are novel engineered composites with special microstructural patterns that lead to uncommon macro properties compared to natural material systems. In this work, we first present a novel mechanism for evolving the elastic band gap structure in a bio-inspired composite through tension …
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Analysis of two methods of isometric muscle contractions during the anti-G straining maneuver
… isometric muscle contractions during the Anti-G Straining Maneuver (AGSM). 12 subjects (ages 18 to 38 yrs, height 176.8 +/- 7.4 cm, body mass 78.8 +/- 15.6 kg, percent body fat 14.3 +/- 6.6%) participated in the study. The study was a one-way within-subject design with test conditions …
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Design, production and evaluation of an auxetic straining device for application in lung tissue engineering scaffolds
… to pore architecture control. Next, a substrate-straining device was designed to apply controlled mechanical cues to the porous collagen scaffolds. By capitalising on the negative Poisson’s ratio exhibited by auxetic materials, it was possible to translate uniaxial loading into biaxial expansion. …
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Comparison of optical density, total cell protein, and number of viable cells (via fluorescent straining) as measures of microbial growth kinetics in suspended and biofilm cultures during biodegradation of naphthalene
Most studies on bacterial growth kinetics have been dependent on theoretical modeling with general biomass measurements using either dry weight or optical density (OD), without distinguishing live from dead bacteria or debris. As a result, there remains considerable uncertainty in reliably …
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Stratification on the Skagit Bay tidal flats
… stratification by the depth-averaged velocity, straining of the horizontal density gradient by velocity shear, and turbulent mixing are shown to be the dominant processes. On the south-central flats (near the south fork river mouth) velocities are roughly rectilinear, and the largest terms are …
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Stratification on the Skagit Bay tidal flats
… stratification by the depth-averaged velocity, straining of the horizontal density gradient by velocity shear, and turbulent mixing are shown to be the dominant processes. On the south-central flats (near the south fork river mouth) velocities are roughly rectilinear, and the largest terms are …
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Quantification of Trapped Diluted Bitumen Droplets in Gravel: an Experimental Study
… mathematical models that included attachment and straining filtration mechanisms used in colloid transport were employed to fit the experimental data. Results showed that trapped dilbit droplets in gravel follows a hyperexponential (not log-linear) profile. Smaller gravel size (3 mm) or higher …
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Thermal and Mechanical Stability of Nanograined FCC Metals
… transmission electron microscopy annealing and straining experiments provide clarification of some of the mechanisms operating during the microstructural evolution of nanograined face-centered cubic free-standing thin films under thermal and mechanical loading, while also raising many previously …
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Low and Structure at Constant Temperature in a Superplastic Fe-Al-Mn-C Alloy.
… allotropic transformation temperatures during straining.
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The Effect of Plastic Deformation on a Series of Thin Magnetic Films
… bending over a cylinder of fixed radius and (2) straining the sample laterally using an Instron 5566 materials tester. The magnetic properties were measured after each straining session via VSM using a sample holder developed for these experiments, which would allow the characterization. The …
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Finite Element Modeling of Strain Localization Initiated by Geometric Irregularities
… of deformation into zones of intense straining, known as shear bands, is a common phenomenon in inelastic deformation. The modeling of this phenomenon by the finite element method is hampered by a number of factors; the lack of a priori knowledge of the location, direction, and onset …
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Micromechanics Approach to the Study of Constitutive Response and Fracture of Solid Propellant Materials
… stress are obtained under purely hydrostatic straining conditions. The dependence of the dewetting stress on the loading rate, particle size, and particle/matrix bond fracture energy is quantified.
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Investigations on mobility of carbon colloid supported nanoscale zero-valent iron (nZVI) for groundwater remediation
… in the first centimetres and only weak straining in the further travel path and no gravitational influence on particle transport. Straining at the beginning of the travel path in the porous medium was observed with tomographic investigations of transport. MRI experiments revealed similar …
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Ballistic Impact Resistance of Graphite Epoxy Composites With Shape Memory Alloy and Extended Chain Polyethylene Spectra™ Hybrid Components
… the hybrid component is not restricted from straining by surrounding graphite material. However, no significant increases in energy absorption were found when two perpendicular SMA layers and an SMA-aramid weave configuration were tested on the backface. In all cases, the embedded SMA fibers …
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I know you are, but what am I? : stories
… wrestling with complex personal relationships. Straining to overcome their cynicism and not be merely "clever" about love and friendship, they find themselves caught in self-conscious quests, which, in turn, leave them dizzy with options, scared, and to some extent paralyzed by what they …
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Tear strength of filled rubbers
… to propagate tearing in the direction of pre-straining was investigated using split tear test-pieces. The tearing energy for crack propagation in the direction of molecular orientation gives a quantitative measure of strength anisotropy developed in the vulcanizate as a consequence of …
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A study of dislocation structures in bulk-strained and in situ TEM strained nickel aluminide alloys
… and are similar to those observed in in situ TEM straining studies.
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The exchange of oxygen at the surface of open waters under wind forcing
… the relative importance of wave orbital straining in gas flux enhancement; a wave coupled hydrodynamic process whose significance has previously been neglected. 2. The relative contributions to gas flux from wind shear, wave orbital straining, increased surface area of the waves, …
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Deformation mechanisms in B2 aluminides: shear faults and dislocation core structures in FeAl, NiAl, CoAl and FeNiAl
… results in NiAl were compared with in-situ straining observations of dislocation motion. The dislocations simulated were of (100) and (111) types. The simulations results obtained indicate a strong influence of the planar fault energies on the mobility of the dislocations. As the cohesive …
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