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 11 of 11 for “"Nonlinear Deformations"”.
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Nonlinear deformations of a thick-walled hyperelastic tube under external pressure
… research deals with several novel aspects of the nonlinear behaviour of thick-walled cylindrical hyperelastic tubes under external pressure. Initially, we consider bifurcation from a circular cylindrical deformed configuration of a thick-walled circular cylindrical tube of incompressible isotropic …
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Spectral control of viscous alignment for deformation invariant image matching
… approach retains the broad range of linear and nonlinear deformations that viscous alignment methods can model, but introduces a selectivity that is necessary for recognition. Our method models viscous kernels with an over-complete filter basis. The basis is parameterized with a single scalar …
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Linear to nonlinear rheology of bread dough and its constituents
… the bread making process, large non-linear deformations feature prominently. In mixing and kneading, dough is stretched and sheared by hand or by specially designed mixing devices, while in proofing and baking, the expansion of gas cells causes significant extensional strain on the …
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Elastocapillarity: adhesion and large deformations of thin sheets
… particularly in the regime of geometrically nonlinear deformations. We first consider the form of an elastic sheet that is partially adhered to a rigid substrate, accounting for deflections with large slope: the Sticky Elastica. Starting from the classical Euler Elastica we provide numerical …
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Local Water Slamming of Nonlinear Elastic Sandwich Hulls, and Adiabatic Shear Banding in Simple Shearing Deformations of Thermoelastoviscoplastic Bodies
… theory (TSNDT) incorporating all geometric nonlinearities and used it to analyze, by the finite element method (FEM), transient finite deformations of a sandwich beam with two face sheets and the core made of St. Venant-Kirchhoff materials. A triangular cohesive zone model with stress based …
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Modeling and Control of Surface Micromachined Thermal Actuators
… temperature-dependent material properties and nonlinear deformations that must be included to obtain accurate results. To meet these challenges a three-dimensional multi-physics nonlinear finite-element model was developed using commercial code. The Thermomechanical Inplane Microactuator (TIM) …
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Chemically driven soft bioinspired systems and the variational formulation of physics-informed neural networks
… energy into mechanical work to generate deformations. To design and engineer soft bioinspired materials for applications such as drug delivery and soft robotics, it is essential to understand and integrate such chemomechanical energy convergence. In this thesis, we describe two …
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Integration heterogener raumbezogener Objekte aus fragmentierten Geodatenbeständen
… in form of a bijection for homologous points and nonlinear functions for geometrical constraints leads to the formal definition of the homogenization of maps. An extension of the collocation model allows us to estimate the unknown parameters (coordinates) in the system of the true map and to …
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Mechanics of Beams and Plates with Variable Mechanical Properties
… their mechanical behaviour, particularly in the nonlinear regime and when thickness-stretching effects are considered, remains underexplored. To address this gap, the present thesis develops two-dimensional (2D) and quasi-3D theoretical frameworks to investigate the linear and nonlinear mechanics …
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Optomechanics of two- and three-dimensional soft photonic crystals
… dielectric structures that undergo highly nonlinear deformation due to strain or other external stimulus such as temperature, pH etc. This can in turn dramatically affect optical properties such as light transmittance. Moreover certain classes of lithographically fabricated structures …
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Soil-Foundation-Structure Interaction in the Earthquake Performance of Multi-Storey Buildings on Shallow Foundations
The influence of nonlinear soil-foundation-structure interaction (SFSI) on the performance of multi-storey buildings during earthquake events has become increasingly important in earthquake resistant design. For buildings on shallow foundations, SFSI refers to nonlinear geometric effects associated …