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 9 of 9 for “"Phase Fields"”.
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Phase-Fields and the Renormalization Group: A Continuum Approach to Multiscale Modeling of Materials
… solidification of a dilute binary alloy, using phase-field models.
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A Case Study of Complex Metallic Alloy Phases: Structure and Disorder Phenomena of Mg-Pd Compounds
The phase diagram of the Mg-Pd system was redetermined in the range from 50 at. % Mg to 100 at. % Mg. It contains several intermediate phases with some of them being complex metallic alloy phases (CMAs), i.e., characterized by (i) giant unit cells with more than hundred atoms, (ii) inherent …
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Synthesis and characterization of ceramics in the Ti-B-N-C system
… synthesized by carbothermic reduction as single phase as well as mixtures intended to form composite materials. The aim of the project is to study the physical chemistry of carbothermic reduction for the production of pure nonoxide ceramic powders and also for the in-situ formation of …
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Phase-field modeling of fracture: regularization length insensitivity and mixed mode ductile fracture
… Among computational fracture models, the phase-field modeling approach has emerged as a superior model to overcome the discontinuities associated with cracking. However, we identified a number of shortcomings with existing models, namely in the sensitivity of phase-field model predictions …
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A Computational Framework for Fracture Modeling in Coupled Field Problems
… field problems. We follow the framework of a phase field regularization because of its strength in handling complex fracture patterns. The first application we consider is the fracture simulation of kidney stones during shock wave lithotripsy (SWL), an acoustic-solid-fracture coupling problem. …
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Geological applications of synthetic fluid inclusions
… the halite, sylvite and hydrohalite stability fields. These equations, together with a recently published equation for the ice stability field (Hall et al., 1987), have been used to construct the complete vapor-saturated solubility surface in the NaCl-KCl-H₂O ternary system. The diagram may be …
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Numerical methods for solar tomography in the STEREO era
… couples the tomographic imaging problem to a phase field based level set method. This formulation will render feasible the 3D tomography of coronal mass ejections from limited observations. Finally, we develop a scalable algorithm for ray tracing dense meshes, which allows efficient …
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The electronic structure of the pair-density-wave (PDW) superconductor in the cuprates
… to the daughter CDW. Many aspects of the cuprate phase diagram suggest a unidirectional PDW order parameter maybe be at play in the 2D CuO2 planes, motivating me to adopted the following ansatz : Qx̸ = 0 and Qy = 0. An effective microscopic theory will be forged by embedding the PDW order …
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Mechanical response of polyether polyurethane foams under multiaxial stress and the initial yielding of ultrathin films
… (DIC) technique to compute the strain fields on the surface of the specimen. For some loading cases, including uniaxial compression along the rise direction, the mechanical response of the three foams of lower density exhibits a stress plateau. This stress plateau has been commonly …