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Physical and mechanical properties of soft foundation may change strikingly because of the rainstorm, constantly softening phenomenon of soft foundation in full underwater has affected the stability of slope, and engineering has been attracting increasing attention to it [1].
Physical and Mechanical Properties of Soft Rock Soften under Saturated Water Study on the water - rock interaction is one of the new frontiers in geotechnical engineering, and study the change of the mechanics properties of the different types of soft rock in saturated condition, for further discuss on the essence and the regulation of saturated soft rock under the condition of the softening has theoretical significance.
In natural state the rock is relatively complete, hard, mechanical performance is good, when encountering water after a short time rapid expansion, crumbling and softening, which causing the rock mechanics properties quickly greatly reduce [2].
Combined with engineering examples, study on the slide block the stability in different conditions, the results show that on the assumption that the saturated static water, owing to the mechanical properties of rock mass structure surface constant, the stability safety factor of slope change is not apparently.But assuming mass effect in saturated water effect, make the rock mass structure surface mechanical properties of soft, intensity decreases, this would lead to slope slide block stability's influence is more obviously.
[3] ZHOU Cui-ying, DENG Yi-mei, TAN Xiang-shao, LIU Zuo-qiu, SHANG Wei, ZHAN Sheng Experimental Research On The Softening Of Mechanical Properties Of Saturated Soft Rocks And Application[J].

However, to obtain engineered surface texture with a prescribed shape, size, orientation, and distribution to investigate how forms and shapes of surface texturing affect the tribological properties on interacting surfaces, the machining conditions still need to be optimized.
To investigate how forms and shapes of surface texturing affect the tribological properties on interacting surfaces and then obtain the optimized surface topography with a desired performance, it is essential to obtain various engineered surface texture with a prescribed shape, size, orientation, and distribution.
Besides, the metal structures so generated cannot offer sufficient bonding strength to substrate, which will influence the mechanical properties of the surface textured substrate.
To evaluate the sliding properties of water droplets on surface, both the advancing (θA) and receding (θR) contact angles should be considered.
In this paper, the influence of various factors on etched results quality was investigated experimentally and the etching conditions were obtained.

The welded metal bellows stand types of load during working, there are many factors influencing the tear and the elasticity loss of the welded metal bellows.
According to various load and displacement properties, the strength of the bellows is divided into axial strength, flexural strength, and torsional strength [2].
Table 2 The material properties of welded metal bellows Material Properties Young's Modulus (pa) Poisson’s Ratio Density (kg/ m3) Limit of Yielding(Mpa) Plastic Modulus(Mpa) Value 1.93× 1011 0.3 7.80× 103 207 207 An algorithm for generating 3mm tetrahedral mesh for welded metal bellows is adopted. 181 710 cells and 90466 nodes are divided for single layer bellows, 351460 cells and 185540 nodes are divided for double layer bellows.
Table 2 shows the material properties of welded metal bellows.
Chemical Industry Press, 2009, 77-79 [5] Zhaogao Luan, Khonsari M.M: Numerical Simulations of the Flow Field around the Rings of Mechanical Seals[J], Journal of Tribology, Vol.559-565(2006) [6] Flitney,R.K and Nau,B.S.A study of fators affecting Mechanical Seal performance prco.

From the point of operation, the factors of affecting condensation heat transfer mainly are non-condensing gas (air).It has a very negative impact to the condensation heat transfer, even if the content is minimal.
Affect Factors of Convective Heat Transfer.
The factors of affecting heat transfer efficient α3 include two factors.
One factor is affecting flowing, which is connected with flow rate, feature size and physical properties.
We take measure to receive better economic returns through the analysis of affecting heat transfer factors.

The welding zone consists of different regions with characteristic microstructuralal details such as a weld nugget, a thermo-mechanically-affected zone (TMAZ) and a heat-affected zone (HAZ).
The welding zone is characterized by different regions like a central nugget with a typical onion ring structure, a thermo-mechanically-affected zone (TMAZ), and a heat-affected zone (HAZ)[2].
Table 2 shows the mechanical properties of parent metal and FSW joint.
Fig. 6 shows the relationship between the crack growth rate, da/dN, and the stress intensity factor (SIF) range, ∆K.
Base metal FSW joint 0.2% offset yield point [MPa] 220 125 Tensile strength [MPa] 300 265 Elongation [%] 8 18 Table 2 Mechanical properties of AA5454.

Many factors influence the humidity distribution of surrounding rock in roadway of swelling rock.
It is neither possible nor necessary to set all the factors in the simulation test alike .Selecting the appropriate conditions of similarity, developing the reaction of expansive rock physical and mechanical properties of similar material, is the key to correct simulation prototype.
But due to the numerous factors that affect the expansive characteristics of swelling rocks and the complexity of the geological condition, until now the material similar of swelling rock is still not suitable.
Since compared with other ratios, the properties of the similar material corresponding to ratio A is the closest to physical and mechanical property indexes required by material model test; (4)In future studies of the expansive rock similar material mixture ratio, in order to seek more ideal expansion rock similar material, the more in-depth investigation of mineral properties and shrinkage can be conducted.
Study on engineering properties of expansive rock [ J ] .

To explore slag glass micro composition and structure of its active role, The slag micro-structure was analyzed from the structure levels, and then the factors affecting the activity of slag was evaluated.
The Influencing Factors of Slag Activity.
Many factors are influencing the potential activity of slag.
(2) Chemical composition The chemical composition of slag is a essential factor affecting the slag’s hydration activity, but it cannot fully and accurately express the slag’s hydration activity.
Some engineering properties of slag concrete as influenced by mix proportioning and curing.

The Ladevèze model was used to describe the unidirectional properties of Carbon plies and Ladevèze fabric model was used to describe the homogeneous properties of the S-glass and Kevlar laminates.
Suggestions are also presented for the better hybrid mode to improve the ballistic properties.
Steel is a very popular candidate to protect the structure from various kinds of weapons due to its superior mechanical properties.
This comparison suggests that the mechanical properties of each ply models should be confirmed by further experiments. 2.
Though the sensitivity analysis of the material's mechanical properties, tensile modulus, shear modulus and shear strength in 1,2-plane are the main factors that affect the ballistic property.

Computational fluid dynamics and Numerical acoustic response for ship accommodation areas due to propeller excitation, towards a human factors recommendations Hany Abdelkhalek1,a, Duanfeng Han1,b, Gao liangtian1,c,Qing Wang 1,d 1 College of shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China.
ahany_abdelkhalek@hotmail.com, bhanduanfeng@hrbeu.edu.cn, c gaoliangtian@163.com, dwangqing@hrbeu.edu.cn Keywords: acoustic comfort design, human factors, ship propulsion.
Structureborne sound is directly induced by any mechanical force.
Recently researchers found that Long-term exposure to infrasound and low frequency noise (ILFN, including infra-sound) can lead to the development of vibroacoustic disease (VAD). [9] This acoustical phenomenon affects organs and systems other than hearing, particularly the respiratory tract.
The international studies on maritime accidents has shown that fatigue is continuing to be either the main cause or a contributory factor in a considerable number of casualties at sea resulting in the loss of life and damage to the environment and property.

However, the physical and mechanical properties of this resin was inferior to Orthocryl® [1].
Several factors that influence flexural properties of acrylic resins, including cross-linking agent [4], residual monomers [5], powder to liquid ratio [6], porosity [7], curing process [8], water sorption [9] and molecular weight [10].
The molecular weight distribution is one of the important factors that can be used to determine the properties of acrylic resins [11].
PMMA beads with different molecular weights have an effect on the mechanical properties of polymers [13].
Factors that affect the rheologic properties of acrylic resin denture base materials.