Method purification of liquid radioactive wastes and concentrates from organic impurities
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The UNICO multi-physics code to analyze transients in sodium fast reactors
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Behaviour of Buried Structure Strengthened by Aluminium Foam under Blast Effect
The number of terror attacks on civilian structures has recently increased. Protection of buried structures subjected to blast load remains quite sophisticated to predict. The use of the aluminium foam (ALF) to strengthen buried structure against blast work has great interests from engineering experts in structural re…
Cu첨가 극저탄소강 냉간압연재의 초기 재결정 거동에 미치는 변형미세조직의 영향
This study investigated the effect of a deformed microstructure in Cu-added bake-hardenable (BH) steel on primary recrystallization during the annealing process. To analyze primary recrystallization behavior in cold-rolled BH steel during annealing, deformed grains were classified by four types. If the average orienta…
SURFACE MECHANICAL ATTRITION TREATMENT OF COMMERCIALLY PURE TITANIUM VT1-0
ABSTRACTTitanium substrates were subjected to severe plastic deformation using surfacemechanical attrition treatment (SMAT) in a high energy ball mill. Mechanicaltreatments influence the microstructure and mechanical behaviour of the Ti-surface.Moreover, partial amorphization takes place concurrently in the surface re…
Preparation and Characterization of Selected Rigid Polyurethane Foam Formulations
Density of rigid polyurethane foam (RPF) has a major effect on its mechanical propertieswhich, in turn, determine the performance level in different applications. Several RPFsamples were prepared through free and non-free rise foaming with different densities bychanging the weight percent of its major chemical constit…
NONLINEAR FINITE ELEMENT MODELING OF CRYSTALLINE MICROSTRUCTURAL PROPERTIES WITH APPLICATION TO ALUMINUM ALLOYS FOR MODERN ARMORS
Often, large plastic deformation in polycrystals is influenced by the slip and itsgradients, which arise at the length scales of microstructural heterogeneities, and inparticular grain boundaries. In this work a non-local multiple-slip crystal plasticityformulation, i.e. augmented with gradients, is presented and appl…
MULTI OBJECTIVE OPTIMIZATION OF PRESSURE CYCLE OF ABS INJECTION MOLDING PROCESS
Injection molding is defined as a cyclic process for producing identical products from a mold and it is the most widely used polymer processing operation. The main advantage of this process is the capacity of repetitively fabricating parts. Certain challenges face this process in order to get a defect free product. Th…
PREPARATION AND CHARACTERIZATION OF YTTRIA–CERIA DOPED TETRAGONAL ZIRCONIA / ALUMINA COMPOSITES
Yttria-ceria doped tetragonal zirconia / alumina, (Y,Ce–TZP / Al2O3) composites wereprepared via sol-gel and powder mixing techniques. The bodies were uniaxiallypressed at 220 MPa. The formed green bodies were fired at 1500°C up to 1650°Cwith temperature interval of 50°C and firing rate of 5°C /min. The samples wereev…
Graphene-Supported Metal Nanoparticles and Its Potential Civilian and Military Applications
It is now well established that nanoparticles (1-100 nm) exhibit unique chemical and physicalproperties that differ from those of the corresponding bulk materials. The dependence of theproperties of nanoscale materials on the size, shape and composition of the nanocrystal is aphenomenon of both fundamental scientific…
MODELING AND ANALYSIS OF SHAPE MEMORY ALLOY LAMINATED COMPOSITE PLATES
In the present work, laminated composite plates with surface bonded shape memoryalloy sheets are modeled and analyzed based on the modified higher-order sheardeformation theory. The energy balance equations in conjunction with Brinson’s SMAconstitutive model are used to formulate the heat transfer governing equations.…
A MODIFIED VIRTUAL ORIGIN MODEL FOR SHAPED CHARGE JET PENETRATION WITH NON-UNIFORM DENSITY DISTRIBUTION
The penetration of a shaped charge jet is studied in this paper where the jet densitydeficit is considered. The virtual origin model, which assumes a constant jet density,is modified to include the situation when the jet density deficit causes non-uniform jetdensity distribution. A relation between the relative densit…
GRAIN REFINEMENT OF ALUMINUM-BASED NANOCOMPOSITES
Grain refinement of an aluminum alloy was carried out by adding 0.6 wt.% Al-Ti5-B1master alloy to the aluminum alloy melt at 720 °C for a holding time of 10 minutes. 2wt.% Al2O3 nanoparticles were added to the base melt and mechanically stirred toproduce the nanocomposite. The two types of additions were used in case…
Spectral and Thermal Studies of Mo and Mn d-glucose Complexes.
The complexes of d-glucose with Mo (VI) and Mn (II) were prepared. The structures of theprepared complexes were characterized; the stoichiumtery was determined by the elementalanalysis, mode of bonding by IR and geometry by electronic spectroscopy. Thermal studieswere carried out for the prepared complexes. The mechan…
EGYPTIAN NUCLEAR ACTIVITIES AT RESEARCH REACTORS , LABORATORIES, AND URANIUM PRODUCTION (INDEPENDENT REVIEW)
In this seminar, I discuss and analysis the egyptian nuclear activities at research reactors,laboratories and uranium production as follows:1- laboratories: External beta and gamma radiation is the main source of radioactivity inlaboratories. Also, in some cases measurable radon-gas concentration are available asfollo…
EVALUATION OF SHAPED CHARGE PERFORMANCE UNDER ITS VARIABLE FACTORS
In this paper, two main research directions are used to investigate the shapedcharge phenomenon and to evaluate its performance. These directions are: (i)analytical and (ii) numerical simulation. The analytical direction is presented by amodel consisting of three main phases; these are: (i) jet formation, (ii) jet bre…
Effect of Hydrogen Peroxide Addition on the Photochemical and Sonochemical Destruction of Pyridine in Wastewater
Pyridine and its derivatives have potential impact to various environment segments due to its persistent nature and are normally found in wastewater. The photochemical and sonochemical degradation of aqueous solutions of pyridine have been investigated by means of ultraviolet (UV), ultrasound (US), UV/H2O2 and US/H2O2…
ARTIFICIAL INTELLIGENCE CO-OPERATION WITH CONVENTIONAL METHODOLOGIES FOR CONTROLLING OVER WEAR
Over wear is one of the problems facing industry especially in the third world countries where storing conditions of inserts and workpieces are not ideal. The climates are completely different during day time and at night. The long storing time causes hardening of pieces specially those stored in open areas.This paper…
Humidity Measurement Underneath Wet Composite WrappingFor Early Corrosion Detection
Recent development has allowed composite wrapping to be used to cure and protect the corroded pipeline from further corrosion. However, the integrity of the pipeline and the composite wrapping become a question mark since engineers were unable to determine the curing process progress. Hence, to meet the present day te…
DETERMINING MATERIAL CONSTITUTIVE PARAMETERS ON STEEL SHEETS
Finite element analysis is extensively employed to predict the structural response ofmechanical components so reducing costs of experimental programs. However,among other aspects, the accuracy of the input material parameters in the finiteelement modeling strongly determines the simulation accuracy. The aim of this st…