نتایج جستجو برای: brittleness indices

تعداد نتایج: 84204  

1999
M. J. Coombs H. D. Pfeiffer W. B. Kilgore R. T. Hartley

Though many of the current symbolic problem solvers have attempted to combat "brittleness" with learning procedures, here at the Computing Research Laboratory (CRL) an alternative approach has been developed based on achieving symbolic plasticity through model generation. This paper describes the evolutionary-Model Generative Reasoning (e-MGR) architecture that implements this approach, and dis...

Journal: :Geosciences 2022

Characterizing the top seal integrity of organic-rich caprock shale is critical in hydrocarbon exploration and fluid storage sites assessment because acts as a barrier to low-density upward migrating fluids. This study investigated geomechanical properties Upper Jurassic shales various basins from Norwegian Continental Shelf. Usually, paleo-deposition diagenesis vary basin basin, which influenc...

2015
Witold Brostow Haley E. Hagg Lobland Sameer Khoja

Materials are often characterized in terms of their toughness, though more than one definition of toughness exists. Likely the most widely recognized means of defining material toughness, denoted here as τ, is by the area under the stress strain curve from a tensile test. Another important feature describing the nature of materials is that property known as brittleness, which has for a long tim...

Journal: :Journal of the Japan Institute of Metals and Materials 1983

2009
Shigenobu Ogata Ju Li

We correlate the experimentally measured fracture toughness of 24 metals and ceramics to their quantum mechanically calculated brittleness parameter. The brittleness parameter is defined as the ratio of the elastic energy density needed to spontaneously break bonds in shear versus in tension, and is a primitive-cell property. Under 300 GPa hydrostatic pressure, the model predicts that diamond h...

Journal: :Advances in geo-energy research 2022

A technique is proposed that calculates derivative and volatility attributes from just a few well log curves to assist in brittleness index predictions sparse well-log datasets with machine learning methods. Six are calculated for selected recorded logs: the first derivative, moving average of second logarithm instantaneous volatility, standard deviation volatility. These make it possible extra...

2013
Suresh Sagadevan R. Varatharajan

The microhardness study reveals the mechanical strength of the grown crystal. The Vicker’s and Knoop hardness studies were performed to understand the mechanical behavior of the glycine lithium chloride crystals. The Vicker’s and Knoop microhardness numbers (HV and HK) for the crystal were found for different loads. It is found that these numbers increase with an increase in the load. The Mayer...

Journal: :Australian Journal of Earth Sciences 2022

The South Nicholson region, which includes the Paleoproterozoic Isa Superbasin, Mesoproterozoic Group and overlying younger sediments, is sparsely explored has recently come into increased focus as a result of Australian Government’s Exploring for Future program. Previous exploration identified potential shale gas plays within River Lawn supersequences Superbasin in northwest Queensland’s north...

2015
Hong Zhang Changzhen Hu Xiaojun Wang

The term software architecture (SA) intuitively denotes the high level structures of a software system. It can be defined as the set of structures needed to reason about the software system, which comprise the software components and connectors, their relations and properties. Nowadays SA has become an important factor in the process of software development and the researches mainly focus on th...

This study aimed to develop new statistical models for evaluating the specific ampere draw (SI) based on rock brittleness index in rock sawing process. A variety of rocks, including carbonate and granite, were cut by a fully instrumented laboratory-sawing rig with two different types of circular diamond saws. Laboratory tests were performed at different depths of cut and feed rates. Multiple cu...

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