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 32 for “"flexural rigidity"”.
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Bending properties of a lightweight suiting fabric as affected by a fusible and a nonfusible interfacing
… suiting fabric. These three properties are flexural rigidity, crease recovery, and seam head size. A lightweight suiting fabric, a nonwoven fusible interfacing, and a nonwoven nonfusible interfacing were selected for the study. The flexural rigidity and crease recovery were measured for the …
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On the hydrodynamics of flexible vegetation canopies
… processes, the quantified influence of canopy flexural rigidity remains limited. This thesis addresses how the variation in flexural rigidity results in feedbacks on local hydrodynamics. A series of laboratory-based experiments systematically investigate the influence of varying canopy blade …
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Hydrodynamic and transport phenomena at the interface between flow and aquatic vegetation : from the forest to the blade scale
… Recent studies documenting changes in blade flexural rigidity in response to changes in flow demonstrate a need for understanding the role blade flexural rigidity plays in setting both drag forces, and nutrient flux at the blade surface. We create a model physical system in which we …
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A comparison of fusible interfacings commonly used with selected polyester/cotton shirting fabrics
… suitable weight interfacings by examination of rigidity, bond strength, and dimensional stability. More specifically, varying fiber content and three types of nonwoven interfacing were used. Preshinking consisted of a warm wash and tumble dry Preshrunk and unshrunk fabrics were fused to each of …
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Finite-element modeling of a composite bridge deck
… the form of deflections, strains, and equivalent flexural rigidity are compared with experimental results. A good correlation is found to exist between the finite-element results and the experimental results. A failure analysis, based on maximum stress, maximum strain and Tsai-Wu theories of the …
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Microinvasive probes for the longitudinal interrogation of neural dynamics
… implanted footprint by 2 orders of magnitude and flexural rigidity by 3 orders of magnitude compared to state-of-art electrochemical probes.
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Application of Co-Design Principles for Design of Series Elastic Joints
… investigates how infill density influences the flexural rigidity of fused deposition modeling (FDM) printed PLA beams. These experiments support the use of FDM-printed components as compliant elements within SEAs. Using static three-point bending tests, regression models are developed to predict …
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Manufacture and rehabilitation of guard-rail posts using composites for superior performance
… DMTA. The performance in terms of modulus and rigidity was reduced the most by acidic medium, and the least by saltwater medium. It was concluded that under unaged conditions, the flexural rigidity of wood is improved by 162% due to composite wrapping. The technique of composite wrapping also …
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Physics-Informed Neural Networks for Structural Health Monitoring of Bridges
… Inverse PINNs are then used to estimate flexural rigidity from synthetic and field strain data, achieving flexural-rigidity errors typically below 1% for noisy synthetic data and reducing the error from about 14% to less than 2% when real bridge measurements from a single sensor are …
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Characterization of Mechanical Properties at the Micro/Nano Scale: Stiction Failure of MEMS, High-Frequency Michelson Interferometry and Carbon NanoFibers
… is controlled by mechanical entanglement and flexural rigidity of individual fibers as well as Hertzian forces at the fiber/fiber interface.
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Examination of a Semi-Analytic Finite Element for Plate Bending Problems
… free edges and with any variation of loading or flexural rigidity, including plates with holes or rigid inclusions, may be solved. In developing the computer program, various schemes were implemented to reduce the influence of errors inherent in the beam eigenfunctions and for the reduction of …
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Bridge approach slab analysis and design incorporating elastic soil support
… local two-way action, providing increased flexural rigidity in the direction transverse to the traffic direction. An Excel-based VBA program is developed for application of designing bridge approach slab incorporating partial elastic soil support. Additionally, a biaxial finite-difference …
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Experimental investigation of inclined cantilever beams in vertically falling soap films
… beams (5000 $<$ Re $<$ 25000) with varying flexural rigidity are studied in a vertically falling soap film experiment to visualize the wake and vortex shedding flow characteristics. High speed video and image analysis were used to estimate quantities such as the average displacement, …
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Guided Waves Technique for Measurement of Contained Stress in Uniform Slender Elastic Bodies
… measurements, based on the change of dynamic flexural rigidity under the influence of compressive load, is proposed in this thesis. Scanned laser vibrometry measurements of vibration fields at a prescribed frequency, followed by a comparison with guided wave theory, allow extraction of the …
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Lateral collapse potential of wood pallets
… equilibrium of forces approach including joint rigidity was used. A lateral load test machine was built which induces and measures the amount of horizontal force required to collapse a pallet. After testing, the model was shown to be accurate when no upper deckboard bending occurred and …
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Optimization of Cable-stayed Bridges at the Conceptual Design Stage
… loading conditions, boundary conditions, and flexural rigidity in the towers and decks are able to be investigated and incorporated to obtain a more realistic behavior of the structurally indeterminate cable-stayed bridge. A series of design curves are proposed for the harp, fan, web, and …
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Nonlinear dynamics of three-dimensional solitary waves
… presence of both gravity and surface tension, flexural waves on a floating ice sheet, in which case capillarity is replaced by the flexural rigidity of the ice, and internal gravity waves in layered flows in the presence of interfacial tension. The focus here is on deep-water gravity-capillary …
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An Experimental Investigation into the Passive Reconfiguration of Flexible Plates Near a Free Surface
… to the flow, to reduce drag. Decreasing the flexural rigidity of human-made structures can lead to improved designs that operate at higher propulsive efficiencies. The work presented in this thesis examines the physics surrounding a flexible plate under prescribed oscillatory heaving motions. …
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Slamming of High-Speed Craft: A Machine Learning and Parametric Study of Slamming Events
… of parameters to be evaluated include hull flexural rigidity, LCG location, heave and surge velocity, and impact trim, angular velocity and acceleration. In preparation for this parametric study, an innovative experimental setup was designed to simulate the impact of a deep-vee planing hull …
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Topological defects in single and multi-layer graphene
… such as high in-plane strength but very low flexural rigidity. This causes in-plane strains to be accommodated through out-of-plane deformation enabling engineering complex 3D deformation of graphene-based on patterned in-plane strain. In addition, monolayer graphene only weakly bonds with …
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