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E-mail: sotot_joseluis@yahoo.es Keywords: Composite materials, volcanic ash, failure and mechanical properties.
Next, physical and mechanical tests were done to determine their physical and mechanical properties.
Due to the fact that the mechanical properties of these composites are strongly affected by characteristics of their microstructure, their physical properties such as density, porosity and water absorption were evaluated.
These properties are required in product specifications.
Porosity is damaging to the mechanical properties of these materials.

Then, the Mont-Carlo method is used to create equivalent fracture network, with that scale effects and anisotropic properties of rock mass are studied by RFPA2D, considering different scales and directions in statistical window.
The distributing rules of rock joints not only affect on the size effect, but also affect on anisotropic of rock mass [5].
In addition, the joint fillings have different component, which is related with the growing degree of fracture and components of the rock and some other factors [6].
Finally, we bring tow coefficients to study the impact of joint fillings’ property on the mechanical parameters of rock mass.
Hydraulic properties of fractured rock masses with correlated fracture length and aperture, J.

There are many factors which affect the anchoring effect.
The greater the shear force is, the worse the mechanical properties of the rock and soil and the greater the deformation of creep will be.
Analysis of factors affected on load losses of high capacity and long rock anchors.
ANALYSIS OF THE FACTORS AFFECTING PRESTRESS-LOSING IN PRESTRESSED CABLE ANCHOR. 　
[3] Hui Yang, Chen Chen, ANALYSIS OF THE FACTORS AFFECTING PRESTRESS IN PRESTRESSED CABLE ANCHOR.

Besides, stirring conditions, forming and curing conditions together with the influence of curing conditions on autoclaved sludge bricks’ mechanical properties are discussed.
The brick’s mechanical properties, including compressive strength and flexural strength, are tested in light of the National Standard “Fly Ash Brick” (JC239-2001).
In light of the existing researches on autoclaved sludge brick, the factors affecting the properties of autoclaved sludge brick include the ratio of raw materials, stirring intensity, forming and curing condition and autoclave curing condition.
The choice of factors and levels is listed in Table 2.
The reasons are as follows: during the process of autoclave curing, the hydration reaction occurs fully between lime and fly ash, generating a lot of hydrated calcium silicate minerals, including C2SH (A), CSH (B) and tobermorite, and CSH (B) and tobermorite are very important factors to the physical and mechanical properties of bricks.

The mechanical properties of the specimen have been determined using the tensile testing machine in order to indentify the effect of post processing temperature on the strength of the specimens.
Shape of specimens to determine the tensile properties.
Tensile properties For determining the tensile properties, the Instron 3382 is used.
Tensile Properties.
Thermal parameter used during post processing was the significant factors to be consider while maintaining the part accuracy

Grain content and size affect the wearing degree of test tools which invariably influence the mechanical properties of rock [10].
Conclusion This work had analysed grain size, circularity factor, abrasive properties of selected rocks as well as their effects on button bit length consumption.
Wear of bit button length is not affected by just one factor but combination of the wear properties rock.
Ojo, Brook, N., The Effect of Moisture on Some Mechanical Properties of Rock Mining Science and Technology, 1990, 10: 145-156
Engineering Properties of Rocks and Soils.

In this paper emphasis is placed on developing a better understanding of the effect of Ti and N on the microstructural development and mechanical properties of these new steel types.
The results indicated that steel with a Ti/N ratio lower than the stoichiometric value provide best mechanical properties.
This segregation is significantly important during hot rolling and thermo-mechanical processing (TMP) of slabs by affecting the microstructure and mechanical properties of final products.
Therefore, the studies of thermo-mechanical processing of low Mn steel as well as understanding the behavior of precipitates in those steel are essential factors on hot rolling processes.
The behaviour of centreline precipitates during hot deformation has been examined to clarify their effect on the mechanical properties of final products.

Mechanical properties of composites with different volume fraction of Al phase.
The interface reaction between the matrix and reinforcement plays a crucial role in determining the properties of mechanical properties of composites.
Mechanical properties of composites with different heat treatment temperature.
(3) Mechanical properties of composites after the heat treatment were improved.
Lu, Influence of processing factors on flexural strength of C(f)/PMMA–PMA composites, Mater.

Materials’ Properties for 3DCP Material for 3DCP should have a set of properties, which it was proposed [30] to subdivide into the following groups: "Printability", "Mechanical properties", "Durability".
Speaking about mechanical properties, some authors also consider mechanical properties of fresh 3DPC.
Tan, Mechanical properties and deformation behaviour of early age concrete in the context of digital construction, Compos.
Ye, Mechanical properties of structures 3D printed with cementitious powders, Constr.
Naoum, Factors influencing labor productivity on construction sites, Int.

Alloying by electron beam is a new technology to improve the material surface properties, the advantages of electron beam is it has low stress after treatment and it has no pollution.
When the times of electron beam bombardment reach 5, the coating Ti will remelting, and it will cover the matrix, so the mechanical scratches is becoming blur.
It can be founded in both of this two sample that the maximum depth of stress-affected zones are all turning up when the times of electron beam treatment reach 25, the depth of stress-affected zones can reach 800μm, the section hardness can be increased by 30%- 40%.
Most of the stress-affected zones are imploded at 100μm~200μm depth, with the times of bombardment decreased, the incremental and affected depth of section hardness is also decreased.
(a) COF (b) Amount of wear Fig 6 (a) The tribological properties with surface alloying TiN (a) COF (b) Amount of wear Fig6 (b) The tribological properties with surface alloying Ti Conclusion 1) The process of electron beam treatment is a way of sputtering、remelting and be covered、then sputtering again, at last the alloying layer will react with matrix and combine.