Search results

Study on Electrical Resistivity Characteristics and Influencing Factors of Soil-stone Composite Medium Wang Kui1,a, Zhao Mingjie1,b 1Key Laboratory of the Ministry of Education on Hydraulic & Water Engineering,Chongqing Jiaotong University,Chong Qing,China,400074 aanhuiwk@163.com, b285580984@qq.com Keywords: Hydraulic engineering, soil-stone composite medium, electrical resistivity Abstract: At present, there are only a few theoretical models for researching the electrical resistivity characteristics of multi-phase soil-stone composite medium, as it could be influenced by so many factors.
In line with the results, when the composition of particles are not changed, in the order of sensitive, the main factors that affect electrical resistivity characteristics are water content, porosity, and soil-rock ratio.
However, soil-stone composite medium is a typical multi-phase medium which is composed of soil particles, stone particles, the pores among particles, and the gas and water in the pores etc., its gradation changes a lot, the water content is extremely uneven, and the particle diameter, rock type, stone content, water content, and degree of compaction have huge impacts on the engineering properties.
Its physical and mechanical properties are essentially different from pure soil medium and rock medium, so using the resistivity theory of pure soil medium or pure rock medium couldn’t evaluate the structure and physical and mechanical parameters of soil-stone composite medium accurately.
The main conclusions are as follows: (1) When the composition of particles is constant, in the order of sensitive, the main factors affecting the resistivity characteristics are water content, porosity and soil-stone ratio

In this process, factors such as current density, temperature, electrolyte concentration and additives can significantly affect the performance of the electrolytic copper foil [4-5].
Current density, which is an important parameter for metal electrodeposition, affects the surface quality and mechanical properties of electrodeposited metals.
However, most of the current research on current density is not systematic, and there are few comprehensive studies on how current density affects the surface, internal structure and mechanical properties of copper foils.
This paper aims to explore how current density affects the surface morphology, microstructure and mechanical properties of electrolytic copper foil systematically.
Research on Tensile Properties The mechanical properties of the electrolytic copper foil at different current densities are shown in Fig. 5.

arolando@cicy.mx, bwakayama@tmu.ac.jp, ct-sakai@tmu.ac.jp, dmanceruc@cicy.mx, eamay@cicy.mx Keywords: Biomaterials, acoustic emission technique, material characterization, mechanical properties.
Specimen preparation and factors such as curing and temperature time are well known to affect the mechanical properties of bone cement.
Although all of the specimens were prepared using identical hand mixing techniques and molded into their final shape, such factors changed in function of the formulation.
On the other hand, bone cement synthesized with Monomer 3 (M3) displayed low dispersed values since it was not observable a marked difference between them; it seems that the formulation does not affect greatly the mechanical properties in tension mode.
In comparison with samples with no added monomer (Ref-0%), M1 displayed lower properties.

It is known that poor dispersion of inorganic filler is one of the factors which contribute to the deterioration of mechanical properties of the nanocomposites [3].
Conclusion The study shows that the amount of coupling agent affects the mechanical properties of the PP/ATH nanocomposites.
This increased adhesion helps to enhance the mechanical properties of the nanocomposites.
Effect of Coupling Agent on Mechanical Properties Cellulose and Recycled Polypropylene.
Ulku. (2004).The Effect of Interfacial Interactions on the Mechanical Properties. of Polypropylene/Natural Zeolite Composites.

Grain characteristics are one of the most important factors in determining alloy properties.
The deformation temperature significantly affects the final mechanical properties of the product.
In this work, the effect of heat deformation temperature on the grain microstructure and mechanical properties after heat treatment was investigated.
Shi, et al, Effect of deformation induced precipitation on grain refinement and improvement of mechanical properties AA 7055 aluminum alloy, Mater.
Liu, et al, Influence of cumulative strain on microstructure and mechanical properties of multi-directional forged 2A14 aluminum alloy, Mater.

This work aims to study the effect of particle size to the mechanical properties of PMMA bone cement and also physical properties.
Consequently, the PMMA could be improved the mechanical properties by HAp particles additive.
The distribution of micro- (A) and nano-HAp (B) particles in the PMMA matrix Summary The particles size strongly affected the PMMA properties.
This work showed low the PMMA properties due to the normal casting uncontrollable of the factors such as rate of casting and the time setting of the specimen, which caused the air bubble containing in the PMMA matrix.
Hence, the mechanical properties of PMMA bone cement could be improved by adding the HAp particle additive that affected by the porosity reduction and force distribution in PMMA matrix.

Mechanical Properties Equipment and method.
It could be seen that mechanical properties increased with the curing temperature elevated.
There were two factors that might cause these changes of mechanical properties.
As a result, the fracture process was speeded up, and the mechanical properties were poor.
Meanwhile, curing temperature also influenced on mechanical properties at 125-225oC.

For most of Mg alloy, heat treatment could be utilized to raise the working performance and mechanical properties.
While the temperature and treated time in annealing homogenization are the most important factors to affect the grain structure and appearance.
However, it did not mean that the mechanical properties will always be improved with the temperature enhancement.
Nevertheless, the slight over-burned could not obviously affect the mechanical properties, as shown in Fig1(b).
Hence, the best mechanical properties could be obtained, when the optimum treated conditions could lead to both improvement of strength and plasticity which are affected by second phase contribution and grain size, respectively.

Gear wear is the main factor affecting their performance and service life.
The article compares the material properties of gears of JAWA motorcycle transmissions.
The quality of workmanship as well as the price are factors that should always be considered before the final selection of the item.
Fatigue fracture has four phases: change in mechanical properties, crack initiation, crack propagation, final fracture [8-10].
Material and Methods Gears from three different manufacturers were selected for comparison of mechanical properties.

Thermoelectric Properties of Silicon Germanium Alloy Nanocomposite Fabricated by Mechanical Alloying and Spark Plasma Sintering Zhenye Zhu1,a , Shilei Guo1 1Division of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, PR China azhuzy@hitsz.edu.cn Keywords: SiGe, mechanical alloying, spark plasma sintering, thermoelectric properties Abstract.
The effects of different nano-Si70Ge30B5 doping content on the thermoelectric and phase properties were studied.
Because SiGe alloys have good thermoelectric properties and superior long term reliability at elevated temperature, so they are suitable candidates for high-temperature thermoelectric applications.
In recent years, many studies have been done to further increase the thermoelectric properties of thermoelectric materials by using a nanostructured approach.
The thermoelectric properties were further improved through the adjunction of nano-Si70Ge30B5 particles.