Materials Literature
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The applicability of the modified Gurson - Tvergaard - Niedelman (GTNm) model to computations is considered; in the frame of numerical modeling, the model makes it possible to obtain failure surfaces, realized in experiments with samples, which include scroll-type surfaces. Tests on static tension of plates (prismatic…
The results are presented of experimentally investigating tension of gas-impermeable packages of woven metal grids formed by freely stacking up grid layers, maintaining the orientation of the wires. The results of experimentally studying tension of grid packages in the direction of wires show that their pre-cogging no…
The effect of an EA-grade low-viscosity thinner and of temperature on the rheokinetic properties of an epoxy oligomer of grade UP-610 cured with a Benzam-ABA amine curing agent was investigated. It was established that, when thinner is introduced and the temperature is varied, the lifetime of EFA-B epoxy binder can va…
Over the past several decades, interest in the synthesis and behavior of atomically precise gold nanoclusters has gained substantial momentum. Herein, both catalytic behavior and synthetic mechanisms are explored using techniques more typically applied to organic chemistry. In the case of catalysis, Au25(SR)18 has eme…
Polymers based on polystyrene are widely used as thermoplastic materials due to the diversity in application, easy processability and a relatively low price. About 45% of the produced polystyrene is produced as compact and foamed products. Cellular foam polystyrene could be produced as expanded polystyrene (EPS) and e…
The effect of ceria content on the physicochemical properties and catalytic performance of nanostructured CeO2/Al2O3 for removal of toluene from waste gas stream was studied.The properties of the catalysts were addressed using XRD, FESEM, BET, TPR-H2 and FTIR techniques.XRD patterns confirmed the formation of CeO2 wit…
Progress in the aircraft engine construction is determined by the increase of operation parameters of gas turbine engines, which is inevitably accompanied by an increase of operating temperatures and load for the vital elements of the turbine hot ducts. Furthermore, the requirements for reliability of the engine in ge…
The world currently relies heavily on fossil fuels such as coal, oil, and natural gas for its energy. Fossil fuels are non-renewable, that is, they draw on finite resources that will eventually dwindle, becoming too expensive or too environmentally damaging to retrieve. One alternative source of energy are fuel cells,…
New separation layers were obtained on the basis of fluorinated polyimides (PI) deposited on a diatomite support. The effect of thermal treatment of the separation layers on their texture and chromatographic characteristics was studied. The selectivity of chromatographic columns loaded with the new adsorbents was firs…
A new generation of nanostructured polymeric insulating material is being developed under the GRIDABLE European project framework. One of the main objectives of this project is the improvement of the dielectric properties and the life performance of High Voltage DC cables insulating materials. The dielectric performan…
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In the process of sonodynamic treatment, reactive oxygen species (ROS) are generated to damage cancer cells, and therefore the reproducible efficiency of ROS generation is significant for the treatment. Our previous study demonstrated that trigger HIFU (High-intensity focused ultrasound) exposure sequence, consisting…
Fuel is used as a lubricant in several engine components. Diesel fuel is known for its good lubrication properties, better than gasoline. These properties are examined in standard tests, as prescribed by ASTM. Good lubrication properties are designated as a good lubricity. Most commonly, fuel lubricity is tested using…
Carbon fiber reinforced polymer (CFRP) composites are increasingly being used in a variety of industries such as aerospace and infrastructure. This investigation experimentally examines the effect of incorporating alumina nanoparticles (ANPs), non-functionalized multi-walled carbon nanotubes (NF-MWCNTs), and functiona…
A Self-deployable Deorbiting Space Structure (SDSS) is used for drag augmented space debris removal. A highly flexible frame allows for a folding of the structure by bifurcation. This research models the structural loads during the deployment and unfolding of the drag sail in Low Earth Orbit (LEO). The Spacecraft trav…
Segmentation is an image processing method used for partitioning an image into multiple sets of pixels, which are defined as its "super-pixels". Here, we are proposing a method based on segmentation, for determining the super-pixels corresponding to the pores resulting from freeze-drying of a pharmaceutical solution.…
This paper presents the initial characterization of a new burner design to study the effect of non-thermal plasma discharge on combustion characteristics at atmospheric pressure. The burner allows stabilizing an inverted cone flame in a mixture owing through a perforated plate designed as a microplasma reactor. The de…
Charge transport properties of manganites can be significantly modified by temperature, chemical doping, strain, and interfacial boundaries. In this dissertation, we report studies on broadband far-field infrared spectroscopy and near-field infrared imaging of single crystalline thin films of Sr doped manganite LaMnO3…
At times, the surface properties of an engineered component must be improved or enhanced when compared to the bulk of the component. Thus, various methods of surface alloying, one of the most important surface engineering processes, have been studied and developed for the decades. This study is concerned with the modi…
Shape memory alloys (SMA) represent an important class of smart metallic materials employed in various innovative applications thanks to their unique thermomechanical behavior. Since the 1980s, several SMA constitutive models have been proposed and implemented into both commercial and academic finite element analysis…