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 26 for “"Rivlin"”.
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Finite Coupled Torsion and Inflation of Functionally Graded Mooney-Rivlin Cylinders with and without Residual Stresses
… large deformations of functionally graded Mooney-Rivlin circular cylinders, focusing on how radial grading of material moduli can be beneficially utilized. We investigate the finite deformations caused by pressures applied to the bounding surfaces and axial loads or twisting moments on the end …
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Limite de Stokes: uma aproximação estável para escoamentos lentos de fluidos não Newtonianos
… of instability that may occur when the fluids of Rivlin-Ericksen are applied. We investigate the conjecture that the instability is due to the different orders of magnitude of the terms that figure in the dynamical equation. By applying the slow flow limit to the whole equation, and not to the …
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Strain analysis in glenohumeral capsule through finite element modelling
… for the material coefficients of the Mooney-Rivlin model used to model the capsule. The Mooney-Rivlin model with the material coefficients C1 = 6, C10 = 6.5, and D1 = 0.12 converged for around 50% of the cycle. The results also suggest that the peak strain occurred on the inferior aspect of …
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On the predictive capability and stability of rubber material models
… rubber material models, namely the Mooney-Rivlin model, Arruda-Boyce model, Ogden model and the newly proposed Sussman-Bathe model, is investigated theoretically with continuum mechanics methods and tested numerically in various deformation situations using the finite element analysis …
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Modelos mistos de elementos finitos para análise de grandes deformações
… equations for elastic and incompressible Mooney-Rivlin type materials are considered. Some results are presented and compared with other solutions.
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Estimation of nonlinear mechanical properties of atherosclerotic plaques
… plaques, parameter estimation, Mooney-Rivlin model, optical coherence tomography, image noise.
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Stabilized space-time fluid-structure interaction techniques with the continuum element
… models: linearly-elastic, hyperelastic (Mooney-Rivlin), and Neo-Hookean. Futhermore, each structure model is tested with two different pressure profiles and two different aneurysm thicknesses. Finally, we suggest a procedural change for further investigation: instead of assuming image-based …
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Nonlinear deflections of a circular plate with varying thickness
… were compared with the solutions using the Rivlin and Saunders constitutive relations and the Hart-Smith constitutive relations. Numerical results from the solution of a plate with uniform thickness were compared with those for a similar plate given by J. T. Oden.
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Flow of viscoelastic fluids through banks of cylinders: an experimental and numerical investigation
… the Phan-Thien and Tanner (PTT) model and the Rivlin-Sawyers (RS) model with the Pap ana sta siou, Scriven, and Macosko (PSM) damping :function. The constitutive equations were fit to the steady shear viscosity of a LLDPE melt and a LDPE melt. The PTT and RS models were also fit to uniaxial …
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Composite Diaphragm Inflation: A Method for Probing the Rheological Functions of Cell -Cell Anchoring Junctions and Cytoskeletal Networks Within a Living Normal Human Epidermal Keratinocyte Sheet
… of finite vertical depth. Assuming a Mooney-Rivlin (MR) constitutive model, we quantitatively demonstrate a new non-traditional regression analysis for estimating values of the MR material parameters and residual membrane tension that best describe a set of experimental inflation response …
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The performance of high speed reciprocating polymer seals in water
… o-ring was modelled using the non-linear Mooney-Rivlin constitutive equation implemented in the finite element code ABAQUS. With this model, the contact stresses existing between the o-ring and the back of the polymer seal have been determined for a range of o-ring squeezes and rubber hardnesses. …
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Buckling of thin-walled cylinders from three dimensional nonlinear elasticity
… neo-Hookean material and of a Mooney-Rivlin material are rigorously obtained from the presented formulation.
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A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy
… housing tube. Viton will be modeled as a Mooney-Rivlin hyperelastic material whose material parameters are previous studied, and Abaqus will be used as a Finite Element Analysis software to study the Viton gaskets’ natural frequencies. The natural frequencies of the aluminum hollow tube will also …
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An experimental and theoretical study of the flow about spheres and discs rotating slowly in viscoelastic fluids
… of the flow about a sphere rotating slowly in a Rivlin-Ericksen fluid contained in a stationary outer concentric sphere is presented. An application of the conformal mapping technique is proposed. The technique is used to obtain the radial and axial velocity components for the flow about a disc …
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Employing Fluid Structure Interaction Analyses to Reveal Insights in Atherosclerotic Progression in the Carotid Artery
… and considered the arterial walls as a Mooney-Rivlin hyperelastic solid. Low Time-Averaged Wall Shear Stress (TAWSS) below the threshold of 0.4 Pa is observed in the ICA region for the healthy (0%) and 30% stenosis cases, consistent with established studies. The 60% and 80% cases exhibit high …
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On the Continuum-Mechanics of Nematic Elastomers
… energy density encompasses the successful Mooney-Rivlin description of rubber and the Oseen-Zocher-Frank description of nematic fluids as specializations. To investigate the nature of solutions, we derive a necessary and sufficient condition for ellipticity of the equilibrated governing system of …
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Hell's Black Intelligencers: Representing Clandestine Labor on the Early Modern Stage
… of András Kiséry, David Schalkwyk, Elizabeth Rivlin, and Michael Neill, I look at the exchange of service between spy and spymaster as an accumulation of social and cultural capital. Thinking through spying in this light, this dissertation explores how playwrights represent these service …
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Material and Geometric Analysis of Structures Subjected to Large Deformation
… tension and planar tension. Nine-term Money-Rivlin constants are obtained through data regression. Finite element simulations have been conducted to simulate the deformed shapes of a membrane around several representative geometries under various vacuum pressure and constraint conditions. …
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Effect of microstructure on mechanical behaviour of arterial tissue
… were characterised with the modified Mooney-Rivlin constitutive material model. Curve fitting was used to compute the corresponding values of the model constants for each tissue type. Fitted material constants were found to differ amongst distinct types of tissue, while histological analyses …
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