نتایج جستجو برای: natural fracture
تعداد نتایج: 574506 فیلتر نتایج به سال:
Spontaneous bone regeneration is an unexpected phenomenon that may take place in large mandibular defects secondary to trauma and tumor resection. One explanation for this unusual healing course is that it may be derived from the mechanism of fracture healing. A review of the literature presents several factors that may influence this process, such as the presence of periosteum and bony fragmen...
Existence and convergence results are proved for a regularized model of dynamic brittle fracture based on the Ambrosio–Tortorelli approximation. We show that the sequence of solutions to the time-discrete elastodynamics, proposed by Bourdin, Larsen & Richardson as a semidiscrete numerical model for dynamic fracture, converges, as the time-step approaches zero, to a solution of the natural time-...
DNA from low-biodiversity fracture water collected at 2.8-kilometer depth in a South African gold mine was sequenced and assembled into a single, complete genome. This bacterium, Candidatus Desulforudis audaxviator, composes >99.9% of the microorganisms inhabiting the fluid phase of this particular fracture. Its genome indicates a motile, sporulating, sulfate-reducing, chemoautotrophic thermoph...
Since natural fractures have shorter heights, it is necessary to incorporate the height difference in mechanical behavior of hydraulic fracture crossing cemented at different angles. However, impact growth on intersection and not yet fully understood present. In this study, we use adaptive cohesive zone methods investigate behaviors a propagating hydrofracture The patterns mechanisms for crack ...
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