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Finally, the influence of the weight ratio (Cu/steel) on the mechanical and electrical properties was discussed.
The effects of various weight ratios on the mechanical and electrical properties of the composite are investigated.
Electrical Properties.
It can be inferred from Fig. 4(b) that the capacity of stiffness affecting the electrical resistance gradually decreases with the increasing stiffness and weight ratio.
Rodney, O, Bouaziz, Y, Brechet, Mechanical Properties of Monofilament Entangled Materials, Adv.

A Preliminary Analysis of Main Factors Affecting Stress-strain Behaviors of Frozen Soil with High Water Content Shujuan Zhang1,a, Zhizhong Sun1,b and Haimin Du1,c 1 State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China asjzhang@lzb.ac.cn, bsun@lzb.ac.cn, c812205958@qq.com Keywords: Frozen Soil, High Temperature, High Water Content, Stress-strain Behavior, Main Factors.
Introduction The strength of soil is one of the most important mechanical properties of soil.
The frozen soil with high temperature and high ice content is rather sensitive to the outside role, so the mechanical properties are more likely to be affected.
So at present study, we will put forward the preparation method of sample with high water content, and analyze the main factors affecting the stress-strain behavior of frozen soil with high water content.
On the basis of the results from plenty of testing data, main factors effecting on the stress-strain curve of high water content can be reduced to the following: Soil type and strain rate For the silty sandy soil, the stress-strain curve is hardening in regardless of the shearing rate and water content at -1.0°C, as is shown in Fig. 4(a).

Microstructure and mechanical properties of laser beam welded AA7021Aluminum alloy Wang Feng*, Xiong Baiqing, Zhang Yong’an, Liu Hongwei, Li Zhihui, Li Xiwu, Xia Fengbin, State Key Laboratory for Nonferrous Metals and Process, General Research Institute for Nonferrous Metals, Beijing 100088, People’ Republic China *E-mail: wfbs@263.net Keywords: Laser beam welding, Microstructure, Mechanical property, Al-Zn-Mg alloy.
Tensile properties of the joints were obtained by testing flat transverse tensile specimens, and the results indicated that tensile strength of these welds approached 76.8~77.3% of the base metal.
Joining is one of the key factors required for industrial application of aluminum alloys[3].
Medium strength Al-Zn-Mg alloys have a good combination of properties making them suitable for many automotive applications where high specific mechanical properties are required.
The microstructure and mechanical properties of an AA7021 alloy laser beam welded material were investigated by a detailed evolutions of the microstructures in various zone, and tensile strength of the joint.

A Study of the Effects of Processing Conditions on Mechanical Properties of Polypropylene/Multiwall Carbon Nanotube Nanocomposites Using Design of Experiments N.
This research work studies the effects of processing conditions on mechanical properties of polymer nanocomposites.
Therefore, the mechanical properties were improved significantly with the content of MWCNTs.
In addition, morphology also shows the result of the dispersion of MWCNTs in the nanocomposite that affects the mechanical properties.
According to Table 2, there is strong evidence that factors (a), (b), (c) and (d) affect the mechanical properties of the nanocomposite (p-value < 0.01, significance level = 0.05).

Joining of Molybdenum and Kovar is difficult because of difference in their physical and mechanical properties.
Various parameters affecting the vacuum brazing process and factors affecting joint strength are discussed.
Factors affecting the joint strength of brazed joints like external compressive weight, diffusion of filler material into the parent materials, surface roughness of parent materials, surface flatness have been discussed.
Brazing is a technique successfully used for joining metals with large difference in their melting points and mechanical properties.
Apart from the braze filler thickness , other factors affecting joint strength are surface roughness of parent materials, flatness of surfaces to be brazed, effect of external dead weight over the brazing assembly and joint design.

Steel Q&T treatments, basic mechanical properties of the 20 mm and 50 mm BIS80 and 12 mm EM812 plates and the welding conditions employed.
The last three terms quantify barriers are due to solute carbon, substructural refinement and dislocations, and are expected to be the dominant factors.
A weldment introduces a structural heterogeneity that locally changes the mechanical properties relative to the base steel.
Bhadeshia: Steels – Microstructure and Properties, 2nd Edition, Edward Arnold, London, 1995 [11] P.
Kannengiesser: Effects of hydrogen on weld microstructure and mechanical properties of the high strength steels S690Q and S1100SQ, IIWDoc.

The mechanical properties and the residual stress were determined using the length dependence of the resonance frequencies of cantilevers and beams.
They largely affect the main MEMS/NEMS characteristics, the quality factor (Q) and the resonance frequency (fres) [3-5].
During device processing the mechanical properties of the epitaxially grown material can be altered [8, 9].
The reliability of the device design strongly depends on the proper knowledge of the mechanical properties of the materials involved in the MEMS/NEMS device.
In general, the softening of the mechanical properties is one of the possible effects of materials with reduced dimensions, because hardening can also occur.

The mechanical properties of porous metals have been extensively investigated [7-11].
Compressive tests on various porous metals have demonstrated that the mechanical properties are also affected by the geometry of cells [12] and the microstructures of cell edges (walls) [13].
This enables the investigation of the mechanical properties and the affecting factors of porous materials in more detail.
For the metal foams with a macro-porous structure, the pore size shows no effect on the mechanical properties [14].
Ashby: Cellular Solids: Structure and Properties.

The influence of the oxide inclusions on the microstucture, properties and the Heat-affected-zone (HAZ) toughness of low alloy steels has been investigated.
The microstructure and mechanical properties of base metal and samples undergoing welding thermo-simulation were also analyzed.
Furthermore, prior austenite grain size is also an important factor affecting the nuclei of IAF [4-5].
Experimental Results (a) (b) Fig.1 The microstructure of steels No.1 (a) and No.2 (b) The microstructure and mechanical properties of base metal.
The mechanical properties for both steels are listed in table 1.

Current research highly concerned about influence factors of the toughen effect and mechanical properties [1-4].
Thus the effective mechanical properties – Young’s Modulus E and Possion’s ratio are defined as Eq. (2).
Particle distribution status is also an important factor affect rubber-toughened polymers.
Chemical and mechanical properties of vinyl-ester /ABS blends, Polymer. 43 (2002) 4503-4514
Lee, Analytical modelling of mechanical properties for rubber-toughened polymers, J.