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 70 for “"deformation theory"”.
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Deformation theory of Cayley submanifolds
… or neither. In this thesis, we study the deformation theory of Cayley submanifolds from two different perspectives.
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Genera via Deformation Theory and Supersymmetric Mechanics
… genera (i.e. cobordism invariants) from the deformation theory in- spired by supersymmetric quantum mechanics. First, we construct a canonical deformation quantization for symplectic supermanifolds. This gives a novel proof of the super-analogue of Fedosov quantization. Our proof uses the …
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On a Local-Global Conjecture in Galois Deformation Theory
In this thesis, we examine a conjecture of N. Boston which says that given an odd irreducible mod p Galois representation, there exist lifts which behave according to prescribed behavior when restricted to inertia subgroups at certain rational primes. We prove that the conjecture holds when a …
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Toward a deformation theory for Galois representations of function fields
We consider a question of describing the one-dimensional P-adic representations that lift a given representation over a finite field of the absolute Galois group of a function field K. In this case, the characterization of abelian p-power extensions of fields of characteristic p can be extended and …
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Deformation theory analysis of a dynamically loaded rigid-plastic cantilever
… viscous rigid-plastic relation by a holonomic deformation theory or non-linear elastic relation. This interpretation can be made because Taya and Mura did not consider any applications in which unloading took place.
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Analysis of composite moving beams using higher order shear deformation theory
… is analyzed based on a higher-order shear deformation theory. The dynamic behavior of the beam is carried out using the finite element method. The formulation is based on a variational principle. The essential constraints are applied via Lagrange multipliers. This method is effective for …
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Linear analysis of laminated composite plates using a higher-order shear deformation theory
A higher-order shear deformation theory is used to analyze laminated anisotropic composite plates for deflections, stresses, natural frequencies, and buckling loads. The theory accounts for parabolic distribution of the transverse shear stresses, satisfies the stress-free boundary conditions on the …
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Understanding the mechanics of growth: A large deformation theory for coupled swelling-growth and morphogenesis of soft biological systems
… which is limited to small swelling deformations, and employ phenomenological prescriptions for the dependence of growth rate on concentration of diffusing species and the stress-state in the system. In particular, the termination of growth is enforced through the prescription of a …
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Free Vibration of Bi-directional Functionally Graded Material Circular Beams using Shear Deformation Theory employing Logarithmic Function of Radius
… FGM circular beams by using a logarithmic shear deformation theory that incorporates through-the-thickness logarithmic variation of the circumferential displacement, and does not require a shear correction factor. The radial displacement of a point is assumed to depend only upon its angular …
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A thermo-mechanical finite deformation theory of plasticity for amorphous polymers : application to micro-hot-embossing of poly(methyl methacrylate)
… there is currently no generally agreed upon theory to model the large-deformation, thermo-mechanically coupled, elasto-visco-plastic response of amorphous polymeric materials spanning their glass transition temperatures. What is needed is a unified constitutive framework that is capable of …
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Probability-based stability analysis of a laminated composite plate under combined in-plane loads
… study, namely, the classical laminated plate theory, a first-order shear deformation theory, and a higher-order shear deformation theory. The probabilistic characteristics, such as the probability density and cumulative distribution functions for the resistance to buckling of the plate are …
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Analysis of nonlinear electroelastic continua with electric conduction
This thesis presents the nonlinear theory for large deformation electroelastic continua with electric conduction. This theory is suitable for modeling actuator and sensor devices composed of deformable, electromechanically coupled, highly insulating materials. Consistency is proven between the …
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Gluing Z₂-Harmonic Spinors on 3-Manifolds
… operators. Part II: This part studies the deformation theory of Z₂-harmonic spinors. For a fixed smooth singular set, the deformation theory of 𝑍₂-harmonic spinors is obstructed by infinite-dimensional cokernel of the semi-Fredholm Z₂-Dirac operator. It is shown that the component of the …
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Dynamic instability of composite laminated plates
… are derived based on the first order shear deformation theory with a linear strain-displacement relationship. The regions of instability for the resulting set of coupled Mathieu equations are obtained using a method of simultaneous diagonalization. Boundary frequencies generated using a …
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Numerical Analysis of Stable Crack Growth in Elastic-Plastic Materials in Small Scale and General Yielding
… were carried out for J(,2) incremental theory and a modified J(,2) deformation theory meant to introduce effects related to flow at a yield surface vertex.
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Vibration of laminated orthotropic composite plates and shells.
… Three commonly adopted theories, i.e., classical theory, first-order shear deformation theory and third-order shear deformation theory, have been employed and compared with one another to investigate the influence of transverse shear deformation, structural aspect ratio, length-to-thickness ratio, …
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Isogeometric Finite Element Code Development for Analysis of Composite Structures
… in thin plates in context of first-order shear deformation theory without the additional step and compute better stresses than Lagrange finite element and higher order shear deformation theory for comparatively thick plates i.e. a/h = 4. Also, Nurbs Isogeometric analysis perform well for …
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Simulação numérica para análise estática e de vibrações livres de estruturas de placas de materiais compostos
… A detailed review of the First Order Shear Deformation Theory was made, and two plates elements were implented. The applications include homogeneous isotropic and orthotropic plates and multilayered composite plates. A comparative study between a classical bending element and a shear …
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Nonlinear finite element analysis of a laminated composite plate with nonuniform transient thermal loading
… model which incorporates a first- order shear-deformation theory and nonlinear von Karman strains is described. The model is shown to accurately predict deflections in laminated composite plates due to nonuniform transient heat fluxes and transverse mechanical loads.
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On a class of strain gradient plasticity theories : formulation and numerical implementation
… and numerically implemented: * A one-dimensional theory to understand the basic nature of strain gradient theories; * A small deformation crystal plasticity theory; * A small deformation theory for isotropic viscoplastic materials; and, * A large deformation theory for isotropic viscoplastic …
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