Search results

Power law is employed for quantification of the material properties and zig-zag theory is utilized for the analysis.
As one can see these desirable properties are conflicting in nature and cannot be provided by a single material.
FGM has varying material properties in one or two directions.
In this theory, dependent variables are defined by considering central layer and a zig-zag factor is included in the assumption of dependent variable to account variation of material properties across interfaces.
Mathematical Modeling Power law is used during the present study to define the material properties.

To further improve the mechanical properties of cast iron, cast iron and birth plus people using certain alloying elements to achieve.
Ordinary sand casting in order to eliminate pollution caused by dust and labor-intensive, and many other negative factors, it is sand and resin coated sand using cold-box approach to manufacturing cell, use of environmentally friendly dust to good effect to produce high-pressure molding machine mold external cavity, shown in Figure 3, has achieved good practical results.
Of course, some companies will use cost factors into consideration one of the sand.
Taking into account the convenience of handling sand and casting costs and other factors, this is usually sand and sand covered with sand pads use a unified specification of molding sand.
Also, because the characteristics of lost foam casting process molten metal is heated to vaporization bubble model, the bubble model of discharge combustion product type, the bubble model of this process is to absorb heat, and the use of ante-type casting system, molten metal Finally, fill the cylinder structural elements, the temperature has decreased, which would further reduce the temperature of liquid metal, thereby affecting the foam model of full gasification and combustion.

Magnetorheological elastomers (MREs), also named as magnetostrictive or magneto active materials [1], are capable of changing their mechanical and magnetic properties rapidly, continuously, and reversibly under the action of variant magnetic fields.
Magnetic field induced properties of MREs It is assumed that the ferromagnetic particles are distributed in the matrix uniformly.
Table 1 lists the values of effective material properties obtained by the FEM simulation and Eq. 2 to Eq. 6.
Several factors are investigated to demonstrate the vibration reduction effectiveness of MREs.
First, the field-induced properties of one kind of MREs are numerically analyzed by taking into account the saturation of ferromagnetic particles.

Fang et al. (2006) studied the relationship between material removal rate, surface roughness and abrasive particle characteristics, workpiece characteristic, work pressure, as well as incidence angle through single factor experiment.
Wang et al.(2008) improved the suspension properties and jet stability of the micro-abrasive suspension slurry by adding high polymer into the jet, and summarized principles of selecting slurry major component and put forward an index for assessing slurry suspension quality [5].
We designed single variant factor experiments to monitor the K9 glass material removal rate and surface roughness in each case.
Table 1 Fixed factors of the polishing experiments Fixed factor level Fixed factor level Nozzle diameter 0.5mm Nozzle material WC Abrasive type CeO2 Abrasive particle size #800 Work pressure (kg/cm2) 6 Incidence angle(°) 0 Injection time(min) 15 Abrasive concentration(g/l) 150 Spray distance (mm) 6 specimen K9 glass Results and discussion Mixed additives effect on jet beam.
Since the mechanical strength of the polymer chain is much larger than the fluid viscous force, the polymer in the jet shear layer efficiently prevents jet momentum exchange among neighboring fluid, The velocity distribution of the jet becomes more convergent, hence attenuation of speed along the flow direction slows.

Semiconductor gas sensors detect the composition and concentration of gases by the changes in the properties of the semiconductor materials when contact with the gases to be tested.
The detection of malodorous gases in animal house using the electronic nose won’t be affected by the human factors, and it is more accurate, stable and reliable than olfactometry.
Properties of the odorous substances which have been identified in livestock wastes or in the air around them.
Influence of the annealing and operating temperatures on the gas-sensing properties of rf sputtered WO3 thin-film sensors.
Gas-sensitive properties of thin and thick film sensors based on Fe2O3-SnO2 nanocomposites.

Introduction Diamond is a very attractive material for many potential applications due to its outstanding properties [1,2].
In recent years, the large area optical grade free-standing diamond films have been extensively studied because of its remarkable optical, thermal, mechanical and dielectric properties and high temperature oxidation resistance [3,4].
Recent studies showed that the crystallographic textures exist in the optical grade free-standing diamond films and the distributions of grain orientations strongly affect the properties, performance and reliability of the diamond films.
Consequently, there is a possibility to increase the diamond films properties by use of the anisotropy.
The key factor that affects the crystallographic textures of films is the substrate temperature in the present work.

For 1 V the resulting temperature rise is already about a few degrees, which may already affect the material properties of the polypropylene and therefore influences the strain measurements.
In the calculation the polypropylene was modelled using isotropic material properties, whereas for the glass-fiber reinforced composites orthotropic material properties were used.
These properties were estimated by the use of the Halpin-Tsai equations [3].
In Table 1 a summary of the material properties is given.
Following an analysis of different influencing factors the correct boundary conditions for the process could be derived.

These factors raise concerns that current environmental and human risks of tritium may be underestimated [4,5,6].
Mechanical purification is performed in the subsystem of waste water treatment.
The safety factor of dilution assures that we do not exceed 200 Bq/l.
In other words, these changes affect the individual amount over the amount of tritium contributed.
The amount of radioactivity released during normal operation of the nuclear power plant is so small comparing to the background radiation (that exists naturally in the environment) that the amounts affecting population are often under analytical limits of detection and cannot be directly measured.

Optical properties of the ZnO films were analyzed by spectrophotometric measurement.
Sengupta et al. [10], surface roughness strongly affects the transparency of the ZnO-based films.
The absorption properties of ZnO thin films in UV range are related to the interband transition of ZnO.
Influence of annealing temperature on the structural, topographical and optical properties of sol–gel derived ZnO thin films, Mater.
Structural and Optical Properties of Nanocrystalline ZnO Thin Films Synthesized by The Citrate Precursor Route.

It means that the choice of a particular type of transportation and handling equipment affects not only the structural and technological parameters of the production process, but also economic aspects of the industrial production such as investment and operational costs, pricing, etc.
Their theoretical functional principles, structural design, classification in terms of types, operational properties and application possibilities in transportation and handling of bulk as well as fine materials are generally well known.
However, in the technical documentation of the manufacturer of the SC’s that type of the conveyor was explicitly defined that the specific type of the conveyor was suitable for transporting corn, flour and soft raw materials, which contradicted with the properties of the above-mentioned conveyed substrates.
Summary The example given above shows an improper use of the screw conveyor which is characteristic of what can happen in practice when the design and operational characteristics of the conveying technology as well as mechanical and physical properties of the transported material are not taken into account when considering a simple, at first sight task, of its transportation and handling.
Colijn, Mechanical Conveyors for Bulk Solids, Elsevier Science Publishers, Amsterdam, 1985