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Ultrasonic sensors provide essential information on elastic, mechanical, and material properties with high accuracy and timeliness [10].
Beall, Overview of the use of ultrasonic technologies in research on wood properties, Wood Sci.
Determination of the mechanical properties of Castanea sativa Mill. using ultrasonic wave propagation and comparison with static compression and bending methods.
Factors affecting ultrasonic measurements in solid wood.
Measurement of elastic properties of materials by the ultrasonic through-transmission technique.

Dissimilar welding of copper to stainless steel using conventional welding processes usually exhibits defects such as solidification cracks, lack of fusion and deterioration in mechanical properties due to the difference in the base metal properties.
Though many parameters need to be considered, overlap ratio is one of significant factor which affects the microstructure of clad joints.
However, cladding of copper with stainless steel with good joint properties using fusion welding is always a challenging task.
Celik, "Electrical and thermal properties of the interface at diffusion bonded and soldered 304 stainless steel and copper bimetal," J.
Chen, M.Haghshenas, T.Nguyen, J.Galloway, A.P.Gerlich, Interfacial microstructure and properties of copper clad steel produced using friction stir welding versus gas metal arc welding. 104 (2015),1-9

The real outdoor exposure is never fully reproducible as it comprised of many physical and chemical factors, and varying in intensity and time [2].
The accelerated aging also affected the aesthetic appeal in applications as well as extensive loss in their properties [7].
To have a clear and understanding effect of accelerated aging cycle, future work should be focused on mechanical properties (tensile, bending, impact) of the composites.
Foreman, “Influence of accelerated ageing on the physico-mechanical properties of alkali-treated industrial hemp fibre reinforced poly(lactic acid) (PLA) composites,” Polym.
Bienvenu, “Impact of aging conditions on mechanical properties of thermoplastic polyurethane,” Mater.

The relationship between the mechanical properties of trabecular bone in tension and compression was investigated by several researchers [5, 6, 7, 8] .
Most properties depend strongly on the density of the foam structure and the properties of its material matrix.
The relative density is the most important factor affecting the length of the plateau during compression.
Goldstein, The mechanical properties of trabecular bone: Dependence on anatomic location and function, J.
Leuven, Mechanical properties of bone, ICB Dent (2003)

When inserted, these blocks will be affected by a scale factor according to their intended size.
Treating this representation as a regular block does not give any results, while the insertion scale factors cannot follow the actual variation of dimensions.
The radial ball bearing dynamic block (a) and the corresponding Block Properties Table (b) The Parameters Manager lists dimensional constraint parameters, reference parameters, and user parameters [9].
The Block Properties table defines and control values for parameters and properties within a block definition, Fig. 8.b.
When selecting the block reference, the drop-down menu is set to the values defined by the row Reference in the block properties table, Fig. 8.a.

Influencing factors of slope stability and analysis of landslide model Influencing factors of slope stability The stability of the slope is determined by its internal and external factors,the internal factors is leading role and the status of main part to slope stability,it is the most fundamental.The external factors does induced and initiated destructive effect to slope stability.The internal factors include composition of slope's terrain feature,geological structure,rock mass's properties and structure,rock's initial stress,structure plane's development status .The external factors include the role of water and wind,earthquake,blasting vibration,engineering loads and other factors.
Inder to realizing every rock soil has own constitutive properties,there are more than ten kinds material models in FLAC3D.We always use Mohr-Coulumb plastic model and elastic model to do numerical simulation with the slope.The Mohr-Coulumb plastic model is suitable for the loosely-structured and granular media materials,and also the model building in underground excavation.It must be attentioned although Mohr-Coulumb plastic model is siutable for normal engineering research,but the cohesion and friction angle is much more important than other parameters.The elastic model is suitable for the ground stress field in gravitational plastic.
Determined of the model and index The paper did the numerical simulation in non-working wall based on the representative section.According to the preliminary analysis in non-working wall with the first mining area in Weijiamao open-pit mine,the simulation established model based on the 28th exploration line,its rock-soil body's physical and mechanical parameters are in the table 4.1.
Conclusion (1)Basis for the hydrogeological and engineering geological data in the first mining area in Weijiamao open-pit mine, analysis the slope's physical and mechanical properties.According the experiment get the physical and mechanics index with the weak layer in the coal seam roof and floor,knocking out the main factors of slope failure are the weak layer and the loess upper
Factors affecting the stability of the slope composition analysis.

Their wide applications are due to their excellent electrical and thermal conductivity, ease of fabrication, good strength and fatigue properties.
There are several factors contributing to the popularity of wet etching processes as follows [3]: a.
Their wide use is due to their excellent electrical and thermal conductivity, ease of fabrication, coupled with good strength and fatigue properties.
Compositions and properties of copper and copper alloys can be varied to suit many requirements.
Therefore various studies carried out to investigate the parameters affecting production outputs.

Vibration properties of multi-layered graphene sheets Meiling Tian1,a, Jinbao Wang1,b, Xiaoqiao He2,c, Yuzhou Sun3,d 1 School of Naval Architecture & Civil Engineering, Zhejiang Ocean University, Zhoushan, 316000 China 2 Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 3 School of Civil Engineering and Architecture, Zhongyuan University of Technology, Zhengzhou 450007 China aeileen@zjou.edu.cn , bGamswang@yahoo.com.cn , cbcxqhe@cityu.edu.hk , dyuzhousun@yahoo.com.cn Keywords: graphene sheet; vibration properties; van der Waals interaction Abstract: Based on an explicit formula used for describing the van der Waals (vdW) interaction between any two layers of multi-layered graphene sheets (MLGSs), the vibration properties of five- and eight-layered graphene sheets are analyzed with considering the influence of vdW interaction on the natural frequences.
Successful production and unique physical properties of graphene sheets have stimulated great interest in exploration of possible applications.
Since 2004, many works have focused on studying the potential optical, electronic and mechanical properties and so on.
Bunch et al. [10] reported the fundamental frequencies and the quality factors of graphene resonators fabricated from single- and multi-layer graphene sheets by mechanically exfoliating thin sheets from graphite suspended over a SiO2 trench.
In this paper, the vibration properties of five- and eight-layered graphene sheets are analyzed with considering the influence of vdW interaction on the natural frequences using a continuum mechanical model.

Serious accidents, like combustion and explosion of combustible and explosive fossil fuel chemical products, frequently happening in transportation and logistics fields become killers of human life and property safety and factors affecting social stability and development [1].Therefore, how to solve problems of storage, transportation and safety use of light oil fuels and chemicals is the urgent military and social needs.
Most of non-metallic explosion suppression materials are common polyurethane foam explosion suppression materials, which generate chips and impurities seriously affecting the quality of chemicals due to low glass transition temperature, poor hydrolytic stability and its relatively sever collapse situation[5] [6].
The material possesses quite high mechanical strength and toughness to guarantee collapse doesn’t happen during using process, so the service life exceeds the oil tank; it has good chemical inertness, heat and static conduction properties and anti-bacteria character[6]; in addition, compared with polyurethane foam and reticular metal materials, regular spherical figures are more suitable for various pipelines, oil tanks in abnormal shape and cleaning, which can conduct mechanical automation quick loading and unloading, so it boasts good application prospect.
Study on influence of separate and explosion-proof material on properties of oi lin storage process [J].
Study on influence of separate and explosion-proof material on properties of oilin storage process, 2014, 10(10):124-130

It has unique capabilities to produce complex shapes on conducting materials with high accuracy independent of its mechanical properties.
To improve the electrical conductivity of SiC, free Si was infiltrated into SiC bulk material without affecting the main mechanical properties of the component.
Table 1 shows the mechanical properties of SiSiC materials.
Proper DOE provides an avenue to study the effect of individual factors and their interactions [16].
Design factors: Pulse-on time; determines the duration of an electric discharge and electric discharge pulse control system.