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The residual stress that occurs in fiber-reinforced thermosetting composite materials during cure is one of the severe factors that can deteriorate the performance of composite structures.
Since thermosetting composite materials, which are softened at the beginning of cure, undergo hardening as the cure process goes on, the mechanical properties of the thermosetting composite materials are generally changed during the manufacturing process.
mτ and mW are relaxation times and weighting factors at the given degree of cure.
The relaxation times ( )mrτ α corresponding to rα and the weighting factors mW are presented in references [12, 16].
Since the composite hardens as the cure process goes on, the mechanical properties of the composite are changed.

Box 10, 50728, Kuala Lumpur, Malaysia maleque@iium.edu.my; yabi78@yahoo.com Key words: Milling parameter, CNT-Al nanocomposite, Homogenous dispersion ABSTRACT The dispersion quality is the major concern in nano-composite development as it determines the homogeneity of the enhanced mechanical and tribological properties of the composite.
Many researchers reported that a relatively small amount of nanoscale reinforcement can have a notable effect on the macroscale properties of the composite due to the large amount of reinforcement surface area [5, 6].
For example, reinforcement of carbon nanotubes into the metal matrix enhanced the thermal conductivity and electrical properties, heat resistance or mechanical properties such as stiffness, strength and resistance to wear and damage.
Agarwal, An analysis of the factors affecting strengthening in carbon nanotube reinforced aluminum composites.
Borah, Fabrication and properties of dispersed carbon nanotube–aluminum composites.

Increase of the Mechanical Properties of Low Alloyed Steels through Complementary Alloying C.
The mechanical properties of sintered steels are mainly dependent on the material microstructure determined by the matrix composition.
The paper presents the mechanical properties of some sintered steels obtained from mixtures of Distaloy AB, Astaloy Mo and graphite powders.
Introduction In powder metallurgy steels, more parameters determine the mechanical properties than with wrought ones, and also in different ways: while in latter case increasing the strength, e.g. by alloying, heat treatment, etc., usually means loss of ductility, in PM steels, e.g. lowering the porosity or increasing the sintering intensity positively affects both strength and ductility [1, 2].
Brânduşan,: Powder Metallurgy Progress Journal of Science and Technology of Particle Materials, Vol.3, No. 3 (2003), p. 135 [3] Van Houtte, P.: Mechanical Properties of Metals and Composites.

The investigated structure parameters were correlated with the studied mechanical properties using a commercially granule strength tester.
Mechanical granule properties were measured using an uniaxial compression tester (GFP, Etewe).
This can be confirmed with the measured shape factors (0.39 for sample 1, 0.42 for sample 2 and 0.28 for sample 3).
The spray dried granules were analyzed concerning mechanical properties at identical size classes of 63 – 100 µm.
As average micro parameters (shell porosity and primary particles distances) are similar for all investigated granules, the changed mechanical properties are an effect of changed macro structures that are a result of varied suspension properties.

Influencing factors.
Three major factors affecting the quality of brazed joint are listed in Table 1.
The material properties of filler metal were provided by JMatPro® .
Quality brazed structure can be obtained by selecting optimized influencing factors.
Guo of JmatPro ® for providing the material properties of BNi-x filler metal.

Due to the continuing renovation of the modern technology and the demand for the better consumer products, electricity has become one of the important factors that affect people’s life.
Good electrical contact material should have good electrical conductivity, good thermal conductivity, high boiling temperature, good corrosive resistivity, good impact sustainability and good fabrication properties [2,3].
Figure 5 shows factors vs.
Fig. 5 Factors vs.
Taguchi method was used to improved the performance of electrical switch and obtain the factors that affect the quality to produce the better performance product.

,Lanzhou 730050, China Keywords: noncircular gear, transmission, pressure angle, contact force Abstract:This paper discussed some properties of ovoid gear.
The gear is a kind of special gear that transformed from the non-circular gear, hence just like the non-circular gear it also has some unique properties itself.
Other than the cylindrical gear which possess a series of theory and dynamic research achievements[3] ,the researches of noncircular gear nowadays are almost focus on geometry modeling ,machining ,kinematics simulation and so on, researches on dynamic property is rare ,even because of the following factors such as variable transmission ration ,time variable pressure angle ,eccentricity and contact ratio ,which determine the noncircular gear has different dynamic properties compared with cylindrical gear .During those factors mass and variable pressure angle are two main factors that evoke the change of contact force ,lead to vibration[4].
Journal of Mechanical Transmission.2006(30)04:7-10 [5] Zhang Ai-Mei, Jiang Jia.Wei Lijun,Zhao Juan,Wang Lei,The dynamic property research of noncircular gear.
Journal of Mechanical Transmission.2009(05):20-23 [6] Tan Weiming, The variable pressure angle property of noncircular gear with involute tooth profile.

Introduction Mechanical properties of weld metal and HAZ (heat affect zone) of welded joints are usually different from those of base metal.
Mismatches of the mechanical properties influence strongly the strength, the fracture toughness and the crack growth of welded joints.
The physical parameters matching factors between seam metal and base metal 11, 12 are defined respectively as ；
In order to get the crack propagation angle of the model, the stress intensity factor of the model should be calculated firstly, and then the stress intensity factor should be put into the biggest circumferential stress criterion, finally the crack propagation angle can be obtained.
So in the afterward calculation of this paper, transition area is divided into 10 layers to imitate continuous transition properties of material.

The result also proved that different kind of dispersants and content are also important factors that influence the dispersion property.
Experimental Results and Analysis The Influence of Monomer on UV Magenta Paste's Dispersion Properties.
Different kinds of monomer have different reactive group, its physical and chemical properties such as viscosity have a big difference, it has a great effects on paste's dispersion properties also.
We can obtain different monomers have a different contribution on paste’s performance, by examining a single monomer’s effect on paste’s properties.
Influence of P/B Ratio and Milling Time on UV Magenta Paste's Dispersion Properties.

Unloaded fracture zones (XL316-1 and XL9-15) and faults f231, f208 revealed are the major factors affecting the overall stability of the right bank slope.
The engineering geology problems are following: (1) The physical and mechanical properties of rock (mass) are significantly lower. (2) The granite at the abutments is intercalated by week diabase dykes. (3) Fractures are developed in the granite at the abutments.
The macroscopic properties are then derived from the mesoscopic behaviours by volume averaging. (4) The fracture network simulation method.
The ratio between the corresponding gravitational acceleration G and the real gravitational acceleration is defined as the factor of safety of the slope.The safety factor is reached as 1.24 and plastic zones computed by the model is showing as Figure 5.
Based on the laboratory experiments on mechanical properties of rock blocks and field tests on single fracture plane, the mechanical parameters are transformed into the mechanical parameters of rock masses by stochastic mechanical analysis of the characteristic element in rock masses.