نتایج جستجو برای: fracture modes
تعداد نتایج: 204266 فیلتر نتایج به سال:
The hydraulic fracturing propagation is strongly influenced by the existence of natural fractures. This is a very important factor in hydraulic fracturing operations in unconventional reservoirs. Various studies have been done to consider the effect of different parameters such as stress anisotropy, toughness, angle of approach and fluid properties on interaction mechanisms including crossing, ...
We consider the dynamical tidal response of a neutron star in an inspiralling binary, focussing on impact star's elastic crust. Within context Newtonian gravity, we add aspects to theoretical formulation problem and quantify excitation different classes oscillation modes. The results demonstrate expectation that fundamental mode dominates show how usual deformability (and Love number) emerge st...
With increase in population, modes of transportation and a fast pace of life, an individual's chances of accident and thereby chances of getting fractured have increased significantly. Fracture has thus become a significant factor contributing to morbidity and mortality. To resume a normal life, after one suffers from a fracture is also an ordeal. The transition appears smooth if the fracture h...
Bin Zhou, M. D. Thouless, and S. M. Ward Department of Mechanical Engineering Department of Material Science and Engineering University of Michigan Ann Arbor, MI, 48109 Scientific Research Laboratory Ford Motor Company Dearborn, MI, 48124 Abstract A methodology for determining the cohesive facture parameters associated with pull-out of spot welds is presented. Since failure of a spot weld by pu...
PURPOSE OF REVIEW The aim of treatment in patients at high risk for fractures is to reduce the risk of a first or a subsequent fracture. New data are available on the antifracture effects and side-effects of antiresorptive and osteoanabolic drugs, and new emerging therapies with new modes of action are on the horizon. RECENT FINDINGS Calcium and vitamin D intake should be sufficient, but not ...
Mechanical testing of implant-supported anterior crowns with different implant/abutment connections.
PURPOSE This study evaluated the reliability and failure modes of anterior implants with internal-hexagon (IH), external-hexagon (EH), or Morse taper (MT) implant-abutment interface designs. The postulated hypothesis was that the different implant-abutment connections would result in different reliability and failure modes when subjected to step-stress accelerated life testing (SSALT) in water....
New ceramic materials, like hot-pressed glass ceramics can be used to achieve monolithic full anatomic all-ceramic dental restorations even in the molar areas. Due to the fact that these materials are brittle and susceptible to fracture, the aim of the study was to reveal the fracture behaviour of hot-pressed glass ceramic molar crowns under different loading methods. For the experimental analy...
Quantitative understanding of the parameters which control composite fracture is imperative to the implementation of fail safe design and inspection of critical load bearing structures. For isotropic materials, fracture is essentially controlled by a single parameter, e.g., the fracture toughness or the stress-intensity factor. This one dimensional nature lends itself to experimental quantifica...
PURPOSE The purpose of this study was to determine fracture resistance and failure modes of three-unit fixed dental prostheses (FDPs) made of lithium disilicate pressed on zirconia (LZ), monolithic lithium disilicate (ML), and monolithic zirconia (MZ). MATERIALS AND METHODS Co-Cr alloy three-unit metal FDPs model with maxillary first premolar and first molar abutments was fabricated. Three di...
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