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 “"bending rigidity"”.
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Material properties of actin filament bundles
… multi-scale approach is presented wherein the bending rigidity of scruin bundles and their constituent filaments are probed individually, then inter-related by simple mechanical models. Material properties of filaments and bundles are measured using a combination of optical tweezers, electron …
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The Impact Of Dietary Phytase Supplementation On Skeletal Biomechanics And Characteristics In Growing Swine And Mice
… adequate diet increased (p less than 0.05) femur bending rigidity and mineral content. When phytase was supplemented in the diet with inulin or strontium, no significant impact on skeletal tissue was observed. Dietary inulin supplementation alone for 5 weeks altered (p less than 0.05) the …
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Fatigue response of fabric reinforced polymeric composites
… for structural integrity and degradation in bending rigidity under repetitive simulated wheel load (HS20-44 design truck load) to determine the applicability of the decks to bridge applications. The first deck failed due to local punching shear failure after 230,000 cycles. The second deck …
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Uncovering Structure-Property Relations in Biomimetic Lipid Membranes with Molecular Additives
… cholesterol significantly affects the bending rigidity of lipid membranes regardless of chain unsaturation, when measured on mesoscopic length and time scales. Interestingly, the replacement of cholesterol with engineered molecules, comprised of a sterol unit that is chemically …
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Behavior and Flexure Analysis of Balsa Wood Core Sandwich Composites: Experimental, Analytical and Finite Element Approaches
… available sandwich plates in three-point bending with glass phenolic facings and balsa wood core is being investigated under room and elevated temperatures. Test data on bending rigidity, critical interfacial failure (skin-to-core interface) and shear stress are collected and analyzed. The …
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Simulation of thin elastic solids in the incompressible viscous flow using implicit interface representation
… differential equation which represents the bending rigidity of the interface. The interface is assumed very thin and has zero elastic stress when it is flat. The interface gives singular forces to the incompressible viscous fluid and the fluid solver handles discontinuities across the …
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Coffee-Rings and Glasses: Colloids Out of Equilibrium
… (CMMs). As particle anisotropy increases, CMM bending rigidity was found to increase. This increase in bending rigidity provides a new mechanism that produces a uniform deposition of ellipsoids and a heterogeneous deposition of spheres. In the second set of experiments, we employed colloidal …
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The influence of yarn production and processing variables on loop distortion in plain knit fabrics
… and processing variables. These three are yarn bending hysteresis, bending rigidity, and count regularity. The greater propensity for wool to distort in comparison to acrylic is explained in relation to these characteristics, and to their different changes during processes such as steam setting …
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Effect of composite elements on the mechanics of biopolymer networks
… forces resemble stabilizing factors such as bending rigidity and applied temperature and explore how the collective behavior of magnetic particles play an important role in the rheology of such systems. Finally, we explore the effects of thermal fluctuations on three dimensional collagen …
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The role of microarchitecture in the tensile properties of polymer scaffolds
… include transitions from a floppy regime to rigidity, and from nonaffine to affine regimes, with the increase of strain, coordination, density and bending rigidity. Additionally, we uncover the role of heterogeneity and micro organisation in the evolution of the network when the value of …
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Topology Optimization of Multifunctional Nanocomposite Structures
… of CNT in locations that either maximize the bending rigidity or minimize stress concentrations. Electrical conductivity is maximized by the formation of highly conductive paths between electrodes. Strain-sensing is maximized via location of percolation volume fractions of CNTs in high strain …
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Dynamics and structures of linear and supercoiled DNAs
… is developed for the Brownian dynamics of weakly bending rods with preaveraged hydrodynamic interactions. An expression is given for the mean squared angular displacement $$ of the $m\sp{th}$ bond-vector around the instantaneous x-axis (perpendicular to the end-to-end vector z). The normal mode …
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Unraveling rugae in compressed fiber-reinforced bilayers - New scaling laws for wrinkling, symmetry breaking, and beyond
… the film as an elastic extensible plate with bending rigidity, and we account for the presence of two families of fibers in the substrate through available averaged hyperelastic laws for such composites. The latter accounts for concentration-mediated fiber stiffness, orientation, and …
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Manipulating graphene's lattice to create pseudovector potentials, discover anomalous friction, and measure strain dependent thermal conductivity
… a record high Young's modulus but extremely low bending rigidity; and suspended graphene exhibits very high thermal conductivity. These properties are made more intriguing because with a thickness of only a single atomic layer, graphene is both especially affected by its environment and readily …
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EFFECT OF MISMATCHED BASE PAIRS ON DNA PLECTONEMES
… defect, provided the defect reduces the local bending stiffness. In vivo, if the same energetic scenario prevails, it could localize (or pin) the mismatch at the plectoneme end loop (plectoneme refers to a structure formed by the DNA when it buckles, and its helical axis wraps or writhes around …
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Understanding the membrane biophysics of alpha-Synuclein and its role in membrane curvature induction and structural remodeling
… from the vesicles. We observe a reduction in bending rigidity and surface tension due to binding of aSyn. This result supports our hypothesis that aSyn stabilized highly curve vesicles--inhibiting vesicle fusion--through a relief of curvature stress (surface tension) inherent to the highly …
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Statistical Mechanics of Two-Dimensional Materials; From Biological Membranes to Graphene
… for sized-dependent renormalized bending rigidity and vesicle size distribution: In this work, we discuss the statistical mechanics of closed membranes (vesicles) incorporating both constitutive and geometrical nonlinearities. Our closed-form results may also be used to determine …
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Model Systems For Studies At The Plasma Membrane: Investigating Lipid Phase Behavior And Protein-Mediated Membrane Remodeling
… on membrane properties such as curvature and bending rigidity. In separate in vitro investigations of HIV-1 Gag-membrane associations, we found that lipid composition strongly affects Gag membrane affinity. These results highlighted the complex nature of protein-mediated membrane remodeling …
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Engineering the future of Hybrid Materials with Coarse-Grained Molecular Dynamics
… such as bilayer thickness, area per lipid, and bending rigidity, ensuring transferability across diverse conditions. Collectively, this dissertation showcases the strategic development and application of CG MD models for hybrid materials, highlighting the ability of molecular simulations to …
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Analysis, Design, and Experimentation of Beam-Like Structures
… depends upon the length of the beam and the bending rigidity of the beam. Inflatable structures analyzed with materials with high value of the Young's modulus and low to medium slenderness ratio tend to perform better against the experimental data. This is attributed to the presence of …
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