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Showing 1 to 18 of 18 for “"mechanical anisotropy"”.
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Investigating the Influence of Mechanical anisotropy on the Fracturing Behaviour of Brittle Clay Shales with Application to Deep Geological Repositories
… Clay, with particular focus on the influence of anisotropy on the short-term response of circular tunnels. To achieve this goal, a hybrid continuum-discontinuum numerical approach was used in combination with new field measurements from the Mont Terri underground research laboratory. The response …
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Inherent strength and stiffness anisotropy of laminated rocks
… of rock strength and stiffness, known as mechanical anisotropy, is expected at different scales: large (rock mass) - or small (intact rock) - scales. It is always mandatory for engineering applications built either on or in anisotropic rock masses to investigate the strength and …
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A numerical assessment of architectural parameters for anisotropic behavior in idealised trabecular structures
… cell lattice structure with a large variation in mechanical properties across anatomic site, species, sex, age, normal loading direction and disease state. A common attempt to account for this variation is to correlate the structure of the trabecular bone sample to the mechanical response, which …
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Mechanics and dynamics of living mammalian cytoplasm
… of the cytoskeleton. Evidence of induced anisotropy for cells under mechanical stimuli exists however, the role of cytoskeletal restructuring on mechanical anisotropy remains unclear. Moreover, the effect of this restructuring on intracellular dynamics and forces remains elusive. In the …
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Electrospun Scaffolds for Cartilage Tissue Engineering: Methods to Affect Anisotropy, Material and Cellular Infiltration
… We developed a novel method of imparting mechanical anisotropy to electrospun scaffolds that allowed the production of a single, cohesive scaffold with varying directions of anisotropy in different layers by employing insulating masks to control the electric field. We improved the …
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Structure and evolution of the Australian continent : insights from seismic and mechanical heterogeneity and anisotropy
… surface-wave tomography with an analysis of the anisotropy in the mechanical properties of the lithosphere, inferred from the coherence between gravity anomalies and topography. With a new high-resolution waveform tomographic model of Australia, I demonstrate that the depth of continental high …
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Assessing the Biomechanical Properties of Cornea using Optical Coherence Elastography
… of measurement methods to assess the biomechanical properties of cornea based on low-coherence optical imaging, focusing on optical coherence elastographic techniques, to meet the growing demand for noninvasive high-resolution tissue characterization with improved diagnosis and treatment …
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Structural Design Inspired by the Multiscale Mechanics of the Lightweight and Energy Absorbent Cuttlebone
… investigate how such a remarkable mechanical efficiency is enabled by the multiscale structure of cuttlebone. Using the common cuttlefish, Sepia Officinalis, as a model system, we first conducted high-resolution synchrotron micro-computed tomography (µ-CT) and quantified the …
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A Three-dimensional Model of Poroviscous Aquifer Deformation
… coordinates, respectively, and allow for mechanical anisotropy and the assumption of principal hydraulic directions. Further simplifications of the governing equations are formulated by assuming mechanical isotropy, irrotational deformation and mechanical axisymmetry, which are more …
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Linear and Non-Linear Mechanical Nature of a Living Mammalian Cytoplasm
… and cancer metastasis, involve mechanical processes and are critically regulated by cell mechanics. This thesis comprises of three parts with a common goal of understanding the mechanical nature of the cytoplasm. In the first part of the thesis, we develop high-frequency passive …
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PRELIMINARY EXPERIMENTAL AND MODELING STUDY OF PRESSURE DEPENDENT PERMEABILITY FOR INDONESIAN COALBED METHANE RESERVOIRS
… of the most recent model, incorporating partial anisotropy in coal. This consideration improved the modeling results although there clearly was room for improvement. The final challenge addressed in this dissertation was to consider the coal geometry appropriate for Indonesian coal, stack of …
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Surface instabilities and interfacial phenomena for nanomanufacturing at the atomically-thin limit
… diverse material properties and superlative mechanical strength. Due to their atomically-thin nature, weak basal plane van der Waals interactions, and vanishing bending stiffness, 2D materials are extremely flexible and thus susceptible to mechanical instabilities that result in deformed …
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Processing Behavior of Thermoplastics Reinforced with Melt Processable Glasses
… several factors were examined to maximize the mechanical properties obtained with the addition of the phosphate glasses. The influence of variables such as the glass and matrix viscosity, glass loading, melt temperature, and mold fill rate were examined for a variety of composite blends …
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Generation of Recyclable Liquid Crystalline Polymer Reinforced Composites for Use in Conventional and Additive Manufacturing Processes
… in the generation of more composite wastes. Mechanical recycling is a cost-effective and environmentally-friendly recycling method, but the loss in the quality of recycled glass or carbon fiber composite hinders the wide-spread use of this recycling method. It is important to develop novel …
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The processing of microcomposites based on polypropylene and two thermotropic liquid crystalline polymers in injection molding, sheet extrusion, and extrusion blow molding
… composites usually exhibit highly anisotropic mechanical properties and the properties do not reflect the full reinforcing potential of the TLCP fibers. Factors considered include the effect of in situ composite strand properties on the properties of the injection molded composite, the melt …
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Tectonic earthquake swarms in the Northern Volcanic Zone, Iceland
… and the role of elevated pore pressures or mechanical anisotropy in generating anomalous fault geometries. Comparison of the temporal evolution of the major sources of deformation with the seismicity provides evidence that deflation of a shallow magma reservoir in Askja caldera plays a …
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Microstructural evolution and mechanical behavior in nickel based alloys for very high temperature reactor
… degradation process during thermal aging. First, mechanical properties of both alloys were studied by performing tensile tests at three different strain rates and at temperatures up to 1000ºC. This range covers time-dependent (plasticity) to time-independent (creep) deformations. At temperatures …
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An investigation of the effects of shearfree deformation and the role of miscibility on the structure and properties of in situ thermoplastic composites
… The effects of partial miscibility on the mechanical properties and morphology of thermotropic liquid crystalline polymer blends were investigated in this part of the work. Blends of an immiscible (Vectra A900) and partially miscible (HX1000) thermotropic liquid crystalline polymer (TLCP) …