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Introduction Micro-mechanical characteristics are one of the most significant contents in mechanical characteristics of coarse grained material.
Sensitivity Analyses of Micro Parameters There are several factors influencing the strength and deformation of coarse grained material, and based on the relationship between these influence factors and shearing strength, the formula can be made as follows: （1） Where is void ratio, is the component of material which includes the particle gradation or material-rock ratio, is the temperature, are shear strain and strain rate, respectively, are the bond strength and friction angle, respectively.
Besides, the friction coefficient has effect on the thickness of shear plane, but it will not affect the spatial distributrion of the shear plane.
Some conclusions could be made as follows: (1) Based on the stress-strain curves obtained by a serial of numerical tests under different micro parameters, the factors of influence on residual strength and peak strength have been analyzed that the influence of the ratio of normal and shear stiffness on peak strength and residual strength is the largest.
Influence on deformation properties of coarse sand of discrete element micro parameters.

Research on the mechanical properties of variable diameter Independent pile under the combined action of wind, wave and flow is carried out.
Taking a variable diameter Independent pile in CB11F platform of Chengdao oilfield for example, simulative analysis is performed using the finite element software ANSYS , considering the influence for some factors to structure response, that is environmental load, soil conditions and variable diameter position.
It is serious to affect the normal work of the platform.
Because the p-y curve method [4, 5] reflect the soil non-elastic properties and failure phenomenon under mud, so the method is widely used in pile foundation design engineering of offshore platform.
According to p-y curve theory, the value corresponding to the force-deformation relationship is calculated in a height below the surface of mud, and lateral load that each layer soil affects on pile can be simulated.

Due to a wide variety of mechanical properties the application of resin composites could lead to better or worse fracture resistance of the restored tooth.
Introduction Human teeth are subject to many and varied destructive factors such as mechanical and thermal loading, caries, abrasion, erosion, and aging as well as restorative and endodontic treatment intervention [1].
The thermo-mechanical properties of the polymer-based resin composites currently commercially available in restorative dentistry can vary in a very wide range [27].
Unfortunately, it is not clear how these properties affect the life of restored teeth.
The only point, which does not produce a singular stress field, is the point with material properties corresponding to the properties of human dentine (NP).

Flow properties.
Flow properties of the samples were evaluated by measuring the static angle of repose and Carr index.
In fine powders cohesion was caused mainly by inter-particle forces such as Van der Waal forces, however if particles were non-spherical other factors such as mechanical interlocking might also a important role particularly in coarser materials [8].
Flow properties.
The effect of CI and AOR on flow depended on the mechanical properties of the particles (e.g. brittle vs. plastically deformable).

The mode of handling the rope through the properties is an ideal solution for transport of the wagons, which led to finding ways to extend its life.
Of the many factors affecting the service life of wire rope, very important is its loading.
Individual factors do not act alone, but during the operation of the rope leads to current and mutual interaction of several factors.
Using of another tension members, for example chains (cell or Gall), is not suitable because the rope is the ideal solution just because of their elastic properties by engagement.
Boroška, Factors affecting life and operational safety of wire ropes, in: Investigation, Production and Use of Steel Ropes, Podbanské, Slovakia, 2000: pp. 15-21.

The main reason for the selection of non-metallic joints (DWJ) is usually based on previous welding engineering design considerations by considering the following factors: 1) Factors considering economic or commercial aspects and efficiency, 2) Factors to consider the application of the required material properties, the required base metal which is advantageous such as mechanical properties, ductility, thermal expansion, corrosion resistance, and others.
Economic factors, for example, if all flow line pipes are stainless steel, the price will be expensive.
The mechanical properties of tensile strength, bend test, and microhardness.
The carbon steel base metal area has improved mechanical properties.
c) Carbon steel has improved mechanical properties while in the area of stainless steel, it has decreased.

Three levels defined for each of the three factors were summarized in Table 1.
Stainless steel 1Cr18Ni9Ti (equivalent to AISI 321H) was used in the simulations as well as experiments, the chemical composition and mechanical properties are given in Table 2.
Table 2 Chemical composition and mechanical properties of 1Cr18Ni9Ti Chemical composition (wt %) 0.07 C, 0.29 Si, 0.7 Mn, 0.03 P, 0.002 S, 9.27 Ni, 17.47 Cr, 0.06 Ti, Balance Fe Mechanical Properties Tensile strength: 550-570MPa,Yield strength:244-258MPa, Hardness:187HV,Elongation:47%,Reduction of area:69% Results and discussion Validation of simulated results.
Other factors which are pooled do not present a statistical significance on the Fx.
But the error (P=48.6%) affects it significantly.

Nowadays, one of the biggest problems is the environmental contamination, which is attributed to a great variety of factors, among which is the construction, because one of the main synthetic materials most used is concrete, artificial material consisting of portland cement, fine aggregates, coarse aggregates and water, in the production and processing of portland cement a large amount of carbon dioxide (CO2) is generated, by 2018 approximately 8% of CO2 emissions from the world is attributed to the cement industry.
Additions of 2% are made with respect to the weight of the cement of organic additions, which do not affect the behavior of the mortar.
Currently there is a wide variety of research on additions to cement, which seek to improve their physical, mechanical and durability, able to withstand aggressive attacks of nature, with low permeability, high adhesion and mechanical resistance [1].
It seeks to improve the physical, mechanical and durability properties of the mortar [6].
These are tests where the sample is physically and mechanically altered to know its properties and thus determine its quality.

It is affected by a variety of factors such as the quantity of constituents, the water/cement ratio, the duration of hardening, the size of granules, the temperature and superplasticizer [9].Dwi Sri Wiyanty et al. concluded that adding a superplasticizer and reducing the quantity of water in the mixture increased the compressive strength of concrete and was influenced by the fine and coarse aggregates[10]. 
The water-cement (w/c) ratio is an essential factor in determining the properties of concrete.
Furthermore, the concrete classes commonly used in local practice (C10–C35) have not been sufficiently studied in terms of the relationship between their mechanical properties and the actual deflections of beams. 
To study the mechanical properties in a fresh and hardened state, six concrete compositions are prepared.
The input properties for steel used are presented in Table 7.

The ceramic (x=0.002) near room temperature exhibited excellent electrical properties (piezoelectric constant d33=172pC/N, planar electromechanical coupling factor kp=0.43, and dielectric constant =418).
A relatively high mechanical quality factor (Qm=200) was also obtained in this particular composition.
The electrical properties of all ceramics were measured after more than 1 day.
The planar electromechanical coupling factor kp and the mechanical quality factor Qm were determined by the resonance-antiresonance method according to IEEE standards using an impedance analyzer (HP 4194A).
This suggests that the grain size and morphology change with increasing BiFeO3 doping, which affects the piezoelectric property of the ceramics.