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 7 of 7 for “"3D fracture"”.
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Meshless methods: theory and application in 3D fracture modelling with level sets
Accurate analysis of fracture is of vital importance yet methods for effetive 3D calculations are currently unsatisfactory. In this thesis, novel numerical techniques are developed which solve many of these problems. This thesis consists two major parts: firstly an investigation into the theory of …
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Quasi-static non-ordinary state-based peridynamics for the modeling of 3D fracture
… initiation and crack branching, especially in a 3D setting. A recent addition to the list of numerical methods used in fracture mechanics, peridynamics is a particle-based continuum model that addresses some shortcomings of other methods. In this work, a quasi-static linearly elastic implicit …
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Effect of loading history in necking and fracture
… deviatoric stress invariant, on plasticity and fracture is studied using flat-grooved transverse plane strain specimens. A generalized asymmetric plasticity model for isotropic materials with both pressure and Lode angle dependence is developed. Calibration method of the plasticity model is …
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Hydraulic fracturing design for horizontal wells in the Bakken formation, Williston Basin
… ultimate recovery, and optimizing hydraulic fracture stimulations. The methods by which these resources are extracted use progressive, or unconventional, technologies. Today, through the use of hydraulic fracturing and horizontal drilling, extraordinary amounts of oil and natural gas from …
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Evaluation and design of an adapted endobutton fixation system to be used in conjunction with suture and endobutton techniques for the treatment of coronoid process fractures
… a fundamental role in the joint's stability. Fractures of the coronoid, typically resulting from high-energy impact, can disrupt this stability and compromise the elbow joint posing a significant challenge to the Orthopaedic surgeon. 3D imaging and fracture mapping are becoming the standard …
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Analysis and modeling of coupled thermo-hydro-mechanical phenomena in 3D fractured media = Análisis y modelización de fenómenos acoplados termo-hidro-mecánicos en medio fracturado
… coeficientes equivalentes del medio fracturado 3D, como son el tensor de rigidez y los tensores de los coeficientes de acoplamiento presion-deformación (Biot). Finalmente, estos resultados son utilizados para desarrollar un modelo continuo equivalente con acoplamiento Termo-Hidro-Mecánico en …
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Generalized finite element methods for three-dimensional crack growth simulations
Three-dimensional (3-D) crack growth analysis is crucial for the assessment of structures such as aircrafts, rockets, engines and pressure vessels, which are subjected to extreme loading conditions. The analysis of 3-D arbitrary crack growth using the standard Finite Element Method (FEM) encounters …