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Sharma et al. [9] investigated the effect of graphite content on wear properties of ZA-27 alloy and concluded that the graphite content up to 1-5% increases the wear resistance property of the composite.
Further, the work also aims at evaluating the wear properties of composites at varying loads and speeds.
This is obviously due to the lubricating properties of graphite.
Satish: Mechanical properties and fractography of zircon-particle-reinforced ZA-27 alloy composite materials.
Auradi, Madeva Nagaral, Bharath V: Effect of Al2O3 particles on mechanical and wear properties of Al6061 alloy metal matrix composites.

Drilling practice has proved that properties of the sediment around borehole are changed when mud invasion, such as strength and pore pressure [15].
The primary parameters and physical properties of the sediments in the simulations were shown in Table 1.
°C -1 Results and Discussions Time-dependent geophysical properties during the invasion of mud.
While the main factors which affect the mud invasion is the positive pressure difference between the borehole and sediment, the penetrability and the invasion time.
They interact on each other and together determine the degree of drilling fluid invasion and hydrate dissociation, which further influences the mechanical properties, pore pressure, water/gas/hydrate saturation, permeability, resistivity and wave velocity of the sediment around borehole.

It was reported that the ratio of TEOS:H2O was an important factor affecting the viscosity of sol [10].
Zhou, Fabrication of a new SiC/2024Al co-continuous composite with lamellar microstructure and high mechanical properties, J.
Xiao, Microstructure and properties of MoSi2-RSiC composites prepared by PIP and MoSi2-Si-Al alloy melting infiltration composite process, Key Eng.
Kennedy, Capillarity-driven infiltration of alumina foams with an Al-Mg alloy: processing, microstructure, and properties, J.
Binner, Microstructure and property characterisation of 3-3 Al(Mg)/Al2O3 interpenetrating composites produced by a pressureless infiltration technique, J.

The results indicated that the properties of the samples such as the setting time, the compressive strength related to the phase analysis of the set cements.
Good properties degradation and rapid degradation rate may lead to the formation of immature bone [3, 4].
The micropores or macropores are not only critical for the above biological behaviors in CPC, but also increase the surface area available for the reaction, enhancing their ability to load growth factors or drugs.
Conclusion In this work, the calcium phosphate cement containing β-TCP affecting the pH of liquid phase was studied.
Bouler, Fabrication and mechanical properties of calcium phosphate cements (CPC) for bone substitution, Materials Science and Engineering: C 31 (2011) 740-747

These techniques include adding substances to the earth or modify the land-water-air soil skeleton in order to improve some of its mechanical properties such as swelling clays or its compressive strength.
This procedure gives also the other more useful properties to the construction.
As its name suggests, it refers to a problem affecting the supporting structure of the building.
In other cases, it can be a symptom of more serious conditions such as those affecting foundations or evolving cracks.
In the case of Tiznit, tests performed on a sample of soil survey at the ruins of a house destroyed by floods gave an incompatibility of properties with the criteria set by the regulation.

If the stresses and deformation of a pile exceed the allowable values, that will affect its normal use and even result in its damage.
Therefore, base on a practical engineering in Shanghai, some factors such as the distances between a pile and a tunnel, the concrete strength of a pile are investigated using finite diffrence method.
To analysis the spacing, concrete strength grade sensitively, in order to research the impact clear spacing between pile and tunnel and the concrete strength grade on mechanical and deformation properties of pile, Specific conditions are as follows: (1) remain unchanged the pile of concrete strength and other parameters, the clear spacing have 1m, 2m, 3m, 4m, 5m five conditions between the tunnel of right side and pile, research the spacing impact on the pile foundation performance; (2) remain unchanged the clear spacing between the tunnel of right side and pile the and other parameters, to take of C15, C20, C25, C30, C35, research concrete strength grade impact on the performance of the pile foundation.

Introduction The landslide is a common natural geological disasters, collapse of the mountain formed after a landslide and debris flow caused by storm often cause serious damage to the national construction and the people's lives and property if monitoring the landslide and realizing landslide hazards early warning, we can minimize and prevent losses caused by the landslide.
If not timely and comprehensive prevention and treatment, it is bound to affect the safety of the lives and property of the people and the sustainable development of the national economy.
Landslide is the natural phenomenon that soil or rock mass on the slopes subject to river erosion, groundwater activity, earthquakes and artificial cut slope factors,sliding down integrally or dispersed along certain weak surfaces or weak zone under gravity, commonly known as "go mountain", "collapse mountain", "soil slip" and so on.
Landslide formation conditions ●The topography: slope height, slope, shape and causes influence; ●Formation lithology:combination of soil and rock;soft and hard rock interbedded ;uniform geotechnical body through jointed surface; ●The geological structure: tectonic belt rock crushing; tectonic structure surface (joints,faults, bedding, strata, unconformities,etc.); strengthen groundwater activities tectonic zone; ●The hydrogeological conditions:lubrication;aggravated dynamic and static water pressure;seepage erosion; ●The impact of human factors and other role:destruction of vegetation, large cut big dig, blasting.
Sensor module(Fig.2): the function of the linear displacement sensor is that a linear mechanical displacement is converted into an electrical signal.It will usually fix a variable resistor to parts of the sensor, to measure the different resistance values through the vane in the displacement on the rails to achieve this effect.The steady state DC voltage attaching the sensor slide rails,a small current flowing through micro-amperes.

A wide range of consolidated methodologies [1-3] is available for single-value property optimization (i.e. hardness, elastic modulus, yield strength).
However, when looking at the fatigue resistance, the optimization problem grows in complexity as the fatigue limit does not give an overall picture of the global behaviour and the number of cycles to failure is strongly influenced by other factors.
Parameter optimization is an important topic in almost all sciences and many suggestion and methodologies can be derived from disciplines far from the field of mechanical and materials engineering.
Such limitation affects the result accuracy and often leads to a partial understanding of the treatment under investigation.
By using the estimated weighting factors it was possible to calculate t and T values that maximize the fatigue life at given amplitude stress.

Following recent initial measurements of the mechanical properties of carbon nanotubes, a flurry of activity is now emerging regarding their incorporation into polymer matrices [4-8].
The orientational torque is described as a physical phenomenon resulting from the interaction between an applied electric field and induced dipole moments due to the shape factors of the MWCNTs.
Dielectric properties of nanocomposites.
Some insights into the way that the external electric fields affect the dielectric properties of nanocomposites may be obtained by examining the variation of permittivity (ε) , and loss tangent (tan δ).
Polylactide/graphite nanosheets/MWCNTs nanocomposites with enhanced mechanical, thermal and electrical properties, Iranian Polymer Journal. 21 (2012) 109-120

However, in practice, nitrogen hardly affects the Hall-Petch coefficient as mentioned above.
Besides, the equation (2) contains an uncertain factor r.
On the discussion in tensile strength, Taylor factor has to be considered.
Taylor factor is 2 for bcc Fe.
[12] A.H.Cottrell: The Mechanical Properties of Matter, Wiley, New York, NY, (1964), pp.277-283