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 12 of 12 for “"mechanical equilibrium"”.
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The constrained geometry of structures : optimization methods for inverse form-finding design
… shapes for structures that need to verify a mechanical equilibrium when built; however, it produces shapes that are difficult to control. This dissertation shows how the design of constrained structural systems is better solved by an inverse form-finding process, where the parameters and …
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Modeling process dynamics in membrane-electrolyte-assemblies of chloralkali electrolyzers considering steric and hydration effects
… operation and lifetime, is prone to chemical, mechanical and thermal damages. Direct measurement and in situ observation on the phenomena inside the membrane are technically challenging and very limited. Throughout this work, a mathematical model based on the non-equilibrium thermodynamic …
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Perturbed equilibria of myosin binding in airway smooth muscle and its implications in airway hyperresponsiveness and asthma
… equilibrated steady-state, not the static mechanical equilibrium that had been previously assumed. This dynamic steady state requires as an essential feature a continuous supply of external mechanical energy (derived from tidal lung inflations) that act to perturb the interactions of myosin …
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Quantitative phase-field modeling of crack propagation in multi-phase materials
… in the total free energy functional and mechanical equilibrium equation within the crack diffusive area to ensure that the maximum stress in front of the crack tip is equal to the stress predicted by classical fracture mechanics. Also, unlike other phase-field models, the effect of …
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Dewatering Of Biosolids By Sodium Ferrate
… optimum pH was 7.0. The time required to achieve mechanical equilibrium defined as the time at which the volume occupied by the solids was no more than one percent of the preceding reading was 1800 seconds for both types of sludge. The optimum rotational speeds were 800 and 2400 for waste …
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A comprehensive solvation theory for colloidal forces with application to both neutral and charged systems
… highlighted the independent roles of a mechanical osmotic stress and the solvent chemical potential in manipulating the solvation state of (bio)colloidal systems. While many experimental systems do not rigorously treat these variables as independent, such experiments have been proposed. …
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High strain rate properties of materials using Hopkinson bar techniques
This dissertation examines the high strain rate mechanical properties of polymers, polymer bonded explosives and solders. In addition, it examines experimental developments that will allow more detailed investigation of these properties in the future. The split Hopkinson pressure bar is a standard …
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Predicting the Dynamics of Injection-Induced Earthquakes
… maintain the fractured rock system in a state of mechanical equilibrium. Under certain conditions, sufficiently high pore pressure can lower this frictional resistance below a critical threshold and initiate an earthquake – the relative motion of rock on either side of the fault plane. Many of …
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Shape distortion and air gap formation during continuous casting.
… the size of the detached lengths of shell. The mechanical equilibrium of the structure is determined by the combined effect of temperature gradients and metallostatic pressure, by the rigidity condition imposed at the corner and by the flexural characteristics of the shell. The yield stress of …
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Multivalent Random Walkers:A computational model of superdiffusive transport at the nanoscale
… The Markov property holds because we let the mechanical motion of the body and unattached legs come to equilibrium in between successive chemical steps, thus the transitions depend only on the current chemical state of the surface sites and attached legs. This coarse-grained model of walker …
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Development and Application of Low-Order Computational Models of the Left Ventricle
… based on prolate spheroidal coordinates. Stress equilibrium is imposed in weak form and the resulting force balance equations are coupled to a lumped-parameter model of the circulation. This leads to a system of differential-algebraic equations, whose numerical solution yields predictions of LV …
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Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media
Hereby I present a PhD thesis by publications. This thesis includes seven journal papers, of which six have already been published in peer-reviewed journals and one has been submitted for publication and is presently under review. This thesis shows that the commonly used single particle-single …