Search results

Some crucial factors that affect ultrasonication are time and amplitude.
The contour of two-dimensional and three-dimensional plots of the effect of time and amplitude factors on the degree of crystallinity of nanocellulose.
[16] Khashayar V, Ghasem A, Seyed HS, Bio nanocomposites based on cationic starch reinforced with montmorillonite and cellulose nanocrystals: fundamental properties and biodegradability study, J.
[19] Vasconcelos Niedja F, Feitosa Judith PA, Gama Francisco MP, Morais Joao PS, Andrade Fabia K, Filho Men de Sa MS, Rosa Morsyleide S, Bacterial cellulose nanocrystals produced under different hydrolysis conditions: Properties and morphological feature, Carbohydrate Polymers 155 (2017) 425-431
[20] Halib N, Amin MCIM, Physicochemical properties and characterization of nata de coco from local food industries as of cellulose, Sains Malaysia 41 (2012) 205- 211

The fines content in soils is one of the most important factors in cracking development, leading to it being of great importance to quantitatively study how the cracking development is influenced by the fines content.
For instance, crack is the weak part for soil mass and it is easy for the decline of soil strength and increase of its compressibility caused by cracks development[2]; In addition, the propagation and connection of cracks will greatly alert the hydraulic properties of soil mass[3].
The significant influence of cracks on soil physical and mechanical properties has made soil cracking study be one of the hottest topics in engineering geology.
It is also still not enough to understand the main intrinsic and environment factors affecting the formation and propagation of cracks for the soils are high complex and conditioned by a large number of variables[2].
For the intrinsic factors, the existed references show a lot of soil characteristics can produce influence on soil cracking, including clay content, mineral content and its composition, specific surface area and ion-exchange capacity, of which, clay content is treated as the most important factor that has been often used to distinguish the potential for soil shrinking and cracking[4].

Making comparison and analysis in the experiment and considering the actual production factors such as cost, working efficiency and product quality standard, it is concluded that laser power being 1900 w, laser scanning speed 6mm/s, spot size 3×15 mm2, focal length being 305mm, the surface of the material quality can meet the requirements of industrial production, laser surface quenched layer becomes harder, good abrasion resistance on the surface of the material is obtained.
（1） H—Depth, P—Power, D—Spot diameter, V—scanning speed The above equation shows that the depth of laser quenching modified layer is proportional to the laser power; in laser transformation hardening process, other factors fixed, the greater the laser power, the deeper the depth of the modified layer[2].
Experiment Experimental material The experimental material is Germany grades GGG70L nodular cast iron, chemical composition shown in Table 1, the mechanical properties shown in Table 2.
Tab 1 The chemical composition of GGG70L steel (Mass fraction, %) C Si Mn P S Cu Ni Mo Mg 3.3～3.8 2.1～2.4 0.4～0.7 ≦0.05 ≦0.01 0.7～1.1 0.8～1.1 0.4～0.6 ≧0.04 Tab 2 Mechanical properties of GGG70L steel material Tensile Strength（N/mm2） Hardness（HB） Hardness after quenching (HRC) GGG70L ≧700 220～270 ≥50 Experimental method The sample is processed into a size of 10mm×15mm×50mm and its surface is wiped by alcoholic swab for smoothness and cleanness.
Effect of Sulfurizing Layer on Tribological Properties of Netted Laser-quenching Surface [J].

The factors affecting thermal conductivity of recycled concrete were analyzed and their calculation methods and formulas of the thermal parameters with different recycled coarse aggregate replacement rate in paper [6,7].
Research on high-temperature properties of recycled concrete, especially experimental study on the fire resistance of reinforced recycled concrete structures, has an important engineering significance.
The mechanical properties of steel bars are tabulated in Table 2.
Strength, Elasticity and Thermal Properties of Concrete Subject to Elevated to Temperature, Concrete for Nuclear Reactors, ACI SP-34,Detroit,1972
Research on the Thermal Properties of Recycled Concrete[D].

The use of dimension stones in architecture and civil engineering implies the knowledge of several mechanical, physical, and chemical properties.
Even though it has been usual practice to measure physical and mechanical properties of dimension stones the same is not true for thermal properties such as thermal conductivity, thermal diffusivity, specific heat capacity, and heat production.
These properties are particularly important when processes related with heating and cooling of buildings must be considered.
Since the same set of rocks has also been studied for other physical properties, a correlation amongst all the measured properties is attempted.
Usually the value of a rock is related with its visual aspect and texture; however, many other properties have to be studied to understand rock quality and commercial value; in that respect the behaviour and response to physical, chemical, and mechanical factors is of the greatest importance.

The finite element method can reflect the nonlinear characteristics of the coupling effect between composite foundation pile, soil and the soil around the pile, the soil using elastoplastic model, and considering the different medium, different distribution, which has great advantages in the analysis of various factors.
Soft soil foundation with low bearing capacity, high settlement, consolidation engineering characteristics of long time negative, built on soft soil foundation in highway, over the years has been a major technical problem in highway construction [1]-[5].Due to computational mathematics model, different, different properties of soft soil, as well as the investigation method, construction technology and other differences, which makes the problem more complicated and outstanding.
Plastic strain increment can be written as: (3) As the hardening parameter type, such as material only elastic deformation, then = 0, in the plastic deformation, ： or （Elastic） (4a) ， （Plastic ） (4b) Through the above equation can be deduced from the following useful relationship between stress increment and strain increment in the elastic-plastic mechanical properties: (5) In this equation：
(6) This paper calculated the soil is divided into five layers, physical and mechanical properties of soil is shown in Table 1, calculated using this numerical simulation model.
Table 1 Physical and Mechanical Properties of Layer Index Value Thickness Soil Name Moisture Contentω The Natural Density ρ Stem Density ρd Void Ratio e Liquid Limit WL Plastic Limit Wp Plasticity Index Ip （%） （g/cm3） （g /cm3） (%) (%) 2 Clay 30.6 1.92 1.47 0.871 42.5 22.4 20.1 4 Silt Clay 50.1 1.71 1.13 1.414 44.1 23 21.1 4 Silt 22.9 2.01 1.63 0.645 26.2 20.7 16.2 4 Silty Clay 28.2 1.92 1.49 0.809 28.4 17.3 11.1 8 Silty Clay 18.7 2.10 1.76 0.532 21.3 11.2 10.1 Figure 1Model of Soft Soil Subgrade Figure 2 Cement Mixing Pile in Treatment of Subgrade Model The results of finite element calculation For the embankment was calculated according to two different conditions, the results are as follows: Figure 3 Settlement Nephogram of Vertical Displacement Figure 4 The Average Stress Nephogram (unit: KN/m2) By not reinforcing roadbed can be seen

The tool material should be matched with workpiece material from physical, mechanical and chemical properties.
Analyzing the influence factors and their contributions is useful to obtain the required surface integrity [6].
Also, work hardening will reduce the surface quality and affect the fatigue strength.
The wear reasons are complex for the mechanical, physical and chemical factors [7,8].
Ashley: Mechanical Engineering (1995), p.

Stem design affects success of cemented stemmed implants [4].
The different stem shapes affected the displacement of the component inside the bone.
Stem design is one available factors which affect failure of an implant [4].
Stem design factors consisting cross-sectional shape size, length, material properties, surface finish and frontal plane shape [4].
Mann, comparison of the mechanical designs of articulating elbow prostheses, Clin.

Mechanical Properties of Nanocrystalline Cu and Cu-Zn Using Tensile and Shear Punch Tests J.M.Tao a, X.K.Zhu a , P.Z.Wong b, R.O.
Shear punch test (SPT) has been used to study the mechanical properties of Cu, Cu-10 wt.% Zn, Cu-20 wt.% Zn and Cu-30 wt.% Zn after ball milling with an average grain size in the range of 33-12nm.
Introduction Mechanical properties and plastic deformation characteristics of metals and alloys are strongly dependent upon their micro- and nanoscale structural characteristics.
In order to obtain the real mechanical properties and understand the plastic deformation mechanism of nc material, samples with theoretical density must be prepared to eliminate the effects of preexisting flaws, such as porosity, weak inter-particle bonding and chemical impurities.
The objects of this work are threefold: First, using SPT to calculate the values of *V and m of Cu, Cu-10%Zn, Cu-20%Zn and Cu-30%Zn prepared by high energy ball milling with nano grains; Second, to discuss the deformation mechanism of nc metals with the change of m and *V obtained through SPT; Third, to compare the mechanical properties of Cu, Cu-10%Zn, Cu-20%Zn and Cu-30%Zn to discuss the effects of deformation twins on the mechanical properties.

Studies on the Oiler edge without being sprayed based on material properties and aerodynamic influences Haiying Li 1,a, Hualiang Wu 2,b, Xiaohong Chen3,c, Shengjian Xie4,d 1 School of Higher Vocational Technology, University of Science and Technology Liaoning, Anshan, 114044, China 2Cold Rolling Plant, Angang Steel Co., Ltd, Anshan, 114021, China 3 School of Mechanical Engineering and Automation, University of Science and Technology LiaoNing,China 4 Central Hospital AnShan, LiaoNing,China a49911944@qq.com, bkexiao1221@sina.com, c ascxh@163.com, d asxsj@126.com Key words: Electrostatic Oiler, Oiler edge without being sprayed, Blade Abstract.
Therefore, we collected all the factors that may affect the sprayed effect, which are as follows: Oiler edge without being sprayed The influence of an electric field The impact of the oil flow The shape of the blade Blade distance The shape of the blade Blade gap Stream of charged particles interfere with each other Viscosity The accuracy of the oily Conductivity Oil room cleaning Oil temperature Steel sheet grounded Steel surface cleaning Plate edge burr Fig.1 Causality of oiler without being sprayed Experimental tracking for the edge without being sprayed We used an equipment of serious problem as a breakthrough; all the tests were performed in this production line.
First examined conventional and easy test factors, then compared and excluded several factors.
Test results for various factors are as follows: Table: Test conclusions about various factors No.
It proved that the edge without being sprayed may be related to this factor.