Materials Literature
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L’étude présentée porte sur la caractérisation et la comparaison des propriétés quasi-statiques et en fatigue de composites à fibres de lin et de verre avec une matrice époxy. Une importante campagne d’essais de fatigue a été réalisée à partir des propriétés quasi-statiques de traction et cisaillement plan mesurées. I…
Solution combustion technique was used for the preparation of NiO-CGO (Ceria Gadolinia Oxide) composites – a precursor to SOFC anode by mixing cerium nitrate, gadolinium nitrate and nickel nitrate in stoichiometric ratio to form a precursor of composition Ce0.90Gd0.10O1.95 – 0.40 NiO. The concentration of oxidant i.e.…
Abstract not provided
International @ RAFFINAGE+EPU:CGE:PAF
An explosive simulation system was developed in LXJ-4-450 geotechnical centrifuge at the China (Institute of Water Resources and Hydropower 1 INTRODUCTION Based on the principle that inertial forces are equivalent to the Earth’s gravity, a small-scale model at elevated gravity can be used to simulate a corresponding p…
Detonation of aluminized explosives is a complicated process, because it is not an ideal detonation. The explosive performance is determined by many factors, such as component, size and shape, and constraint conditions. J.M. Philip (1996) separated the detonation reaction of Al explosives into two steps: the first tak…
Relative elastic differential cross sections for elastic scattering from cytosine and thymine have been measured using the crossed beam method. The experimental data are compared with theoretical cross sections calculated by the screen corrected additivity rule method.
During the different blasting project works in India, the authors collected rebound hardness values of rocks from the various blasting sites using Schmidt hammer. It has been found that the hardness values of rocks could be correlated with explosive charge factors to provide a meaningful relationship for the surface b…
Apart from environmental problems the variation in explosive energy liberation, propagation and utilization cause the following serious operational problems thereby severely influencing the productivity and safety during mining. These are: • Generation of oversize boulders, • Extension of blast induced cracks into the…
This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
When the charge is initiated underwater, it will be born to two kinds of pressure at the same time, atmospheric pressure and the hydrostatic pressure. The relationship between them can be expressed as follows.
Rockfragmentation is an integral component of mining process and it affects the efficiency of the downstream operations. Rock fragmentation depends upon two groups of variables: Rock mass properties which cannot be controlled and blast design parameters that can be controlled and optimized. The costs of downstream ope…
The above mentioned studies successfully predict the failure process in one aspect or another but they have limitation as well. For example, in the application of fracture mechanics theory, it is difficult to estimate the micromechanical parameters such as crack density and toughness for cracks in different modes. Con…
All papers published in this volume of Journal of Physics: Conference Series have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
Commercial explosives are used for a variety of applications in agriculture, civil, mining, prospecting for oil, medical, electrical and metallurgical applications. The various uses are detailed below: a) Mining Applications – Bench blasting. – Box-cut excavation. – Overburden casting. – Tunneling and Shaft sinking in…
Abstract : The aim of the project was develop smart, strong, and light-weight polymer/carbon nanotube (CNT) composites which will sense tribologically induced damages and self-heal by inhibiting such degradation mechanisms, so preventing failure of the composite. The main focus was on the preparation of new multifunct…
Shock sensitivity of explosives, as far as blast engineering is concerned, has been linked to impact energy through the energy fluence criterion (Walker and Wasley, 1969). The criterion utilizes the shock amplitude and its duration to claim that the energy per unit area, the energy fluence, is proportional to the squa…
Both slurry and emulsion explosive were developed to make ANFO water résistant. Unlike ANFO, in slurry explosives both oxidizer and fuel are in liquid form and cross linked to give gel consistency. The gel structure of an explosive prevents the intrusion of water and makes it water resistant. A large reduction in the…
No abstract available.
Using a split-mirror setup attached to a Reaction Microscope at the Free electron LASer in Hamburg (FLASH) we traced as function of time the migration of a hydrogen atom in C 2 H 4 + from one end of the molecule to the other by coincident CH + + CH 3 + fragment detection. In addition, the observed H 3 + +C 2 H + chann…