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The wettability and mechanical properties of solder the joint of Sn-Cu-Ni-xSi3N4 had been investigated.
Nai in his study had reported that mechanical properties of both composites had majorly improved.
They reported that mechanical properties of the composite solder have improved significantly.
Overall, the addition of non-metallic particles can significantly enhance the mechanical properties as reported by several researcher [20-23].
The addition of reinforcement can act as nucleation in the molten solder, thus improving the mechanical properties.

This affects the thermal performance of power devices seriously and makes the working temperature of power devices too high to work normally and causes multifarious questions [1,3].
The results of the present study focus on impacts of different solder voids’ area and distribution on thermal properties and thermal resistance of power devices[2,4].
Chiriac et.al, have won some achievements on impacts of solder voids on PQFN package devices’ thermal and mechanical characteristics [1].
In general, the uppermost influence factor of power devices cooling is the solder voids under active region.
Chiriac and Youmin Yu: Impacts of Solder Voids on PQFN Packages’ Thermal and Mechanical Performances (2010)

The obtained products were characterized for physical and chemical properties by means of XRD, XRF, BET and TEM .
Since the adsorptive capacity is significantly affected by solubility, a higher solubility indicates a strong solute-solvent interaction or affinity.
It was found that the pH of synthesis seemed to have an effect on the size and crystallinity of anatase crystals which affected their photocatalytic activity.
It was revealed that synthesis conditions and optimum amount of TiO2 are the crucial factors affecting the efficiency of photocatalytic activity.
Iier, in : The Chemistry of Silica, Solubility, Polymerization, Colloid and Surface Properties, and Biochemistry.

Its initial properties were shown in Table 1.The COD and color of the water were 4181mg/l and 2541C.U..
Table1 Properties of the original APMP pulping effluent CODCr 4181mg/L Color 2541C.U. pH 7.4 Solid content 0.923% Suspended solids 170mg/L Turbidity 63NTU Effect of culture time on COD removal and Color Fig. 1 Effect of culture time on COD removal and color We first investigated the effect of culture time on the removal of COD and color.
The second was that an alkaline condition had a negative affecting on adsorption of color components of activated sludge, and had contributed to dissolution of organic matter.
The metabolic activity will affected by the temperature negatively while the temperature over or below the optimum temperature.
Compared to other influential factors, the culture time and activated sludge concentration were dominant.

This study investigates the influence of casting parameters on the nodule count of ultrafine spheroidal graphite iron, as nodule count is the major factor for enhancing mechanical properties.
Results showed that silicon content significantly affects graphite fineness (e.g. nodule count) and carbide formation, with a minimum of 3.7% silicon required to prevent carbide formation.
Graphite morphology has a significant impact on the mechanical properties of ductile iron.
Moreover, graphite fineness (expressed by nodule count, nodules/mm2) is also an important role on the mechanical strength of ductile iron.
Unfortunately, only a few studies performed the mechanical test due to the limitation of casting sizes.

With the intention of researching suspension's effect on the self-excited vibration of tire, according to the characters of polygonal wear, the twist beam suspension of car PassatB5 was simplified to proper mechanical model in the method of FEA.
The model of polygonal wear is three-dimensional problem; here we consider that the lateral vibration is the main factor in the whole systems.
Assumed Conditions of Modeling The suspension-tire system is so complicated that many affecting factors will cause the simplifying and accuracy of the model.
(3) Ignoring the affecting of instantaneous tire wear to the characters of tire in the mathematical modeling.
Equivalent Mechanical Model of Twist Beam Suspension Twist beam back suspension is the main object in our research, the geometric model of this back suspension has been showed by Figure 1.

Presenting novel approaches, the paper emphasizes the crucial role of reproducible experiments to elucidate the scale properties coupled with numerical analysis to develop quantitative models with predictive accuracy.
The research quickly revealed that the oxide scale on the hot metal undergoing plastic deformation would need to be treated as a detailed material, not just a homogeneous layer with nominal properties.
Understanding the scale removal mechanism is important for optimisation of industrial mechanical descaling conditions when bending, tension and compression at room temperature are operational factors influencing scale spallation.
The main mathematical assumptions of the model related to oxide scale and implemented properties of materials have been described elsewhere [12].
The finite element model is rigorously thermo-mechanically coupled and all the mechanical and thermal properties were included as functions of temperature.

SiCp aluminium-based composites possess a combination of novel properties including good wear resistance, high thermal conductivity, low expansion coefficient, low density as well as high mechanical strength[1-4].Besides, the preparation of SiCp aluminium-based composites is simple, cheap, development rapid and wide application make it become the focus of research in the contemporary emerging material field [5,6].Because aluminum and SiC particles have huge difference at the aspect of physical and chemical properties, poor weldability become the main factors which prevent its application [2].Research shows that nickel plating on the surface of SiCp aluminium-based composites can increase its weldability [6,7].
Due to difference at the aspect of physical and chemical properties between SiC particulate and aluminum alloy matrix, the characteristic of joining the composites is distinct from aluminum alloy matrix.
Temperature and holding time are key factors in vacuum brazing.
While the solder can melt completely if the holding time increases and the interaction between solder and composites will intensify and the SiC particulate of solid-state gathered further in the interface of joint, which will have negative influence on the properties of the joint.
Holding time affect the hardness of weld joint.

This type of load limit categorization is more applicable to the ideal state designs of newly built bridges; namely, factors such as material properties, boundary conditions, service load are rather clear-cut, but it is not well-targeted at the evaluation and maintenance of sub-health bridges.
For sub-health bridges, its properties usually could not satisfy the normal service limit state and are quite far away from Ultimate Limit State.
The statistical properties, characteristic parameters and ratios of the types of vehicles (given in Table 2) are obtained through large amounts of numerical simulation.
After the random moment effect of sub-health bridges’ operating vehicle load is simulated, one could then calculate the operating vehicle load’s upper limit under a certain degree of security, based on factors such as the bridge serviceable carrying capacity and reinforcement and reconstruction cycle; by further consideration of safety and reliability factors, the operating vehicle load limit is determined.
It can be seen from Fig.4, the box beam moment on two supporting points between frame and beam increased by 107%, which means that the supporting frame damage significantly affected the overall mechanical performance of the bridge.

This paper reviews on the use of heat released information for a better understanding on the reaction kinetics of geopolymerization and correlating the heat released with several factors including concentration of alkaline solution, mixing designation and curing temperature.
As such these conditions could affect the heat released during geopolymerization and compressive strength of geopolymer, both of heat released and compressive strength may be correlated with each other.
It is proven to be affected by certain factors such as concentration of activating solution and reaction temperature.
As previous studies focussing on heat released in geopolymerization for the whole proposed steps in geopolymerization, a further study on correlating the heat released during geopolymerization to the mechanical testing will be useful to give a better understanding in geopolymer.
Both of fly ash and metakaolin have been widely studied for its mechanical properties but the chemical insight of the reaction mechanism using these materials remain to be discovered.