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Mechanical properties of the testing materials were closely related with their morphologies of fracture surfaces.
The mechanical properties, microstructures, and toughening mechanisms of the different materials were investigated.
Results and Discussion Mechanical Properties.
The grain size and fracture mode were another factors affecting the mechanical properties of the testing materials.
The fined grains in the composites was another reason for their high mechanical properties.

At the same time, the mechanical property of the treated welding HAZ was better compared with the untreated.
As a result, the overall properties of parts will be affected negatively.
Five main factors and four levels were selected to design the orthogonal test.
Generally, the refined grain can improve the mechanical property of the metal.
Therefore, the laser remelting technology is an effective method to improve properties of metal materials.

Grey correlation analysis method was used to analyze the influence factors of the four parameters mentioned above, and comprehensive correlation was put forward to evaluate the influence factors of mechanical properties of asphalt mixture.
There are many factors affecting the strength and water-stability of asphalt mixture, such as its mix ratio, construction conditions, construction technology and environmental factors[2], for which it is quite necessary to make some research to decide their effect degree.
By calculating the correlation degree of the target value and effect factors, as well as the sort of correlation degree, the main factor affecting the target value is sought. 1.
(2) The sort of effect factors on comprehensive mechanical properties attenuation of asphalt mixture is: asphalt-aggregate ratio > W-T-R cycle times > compaction times > the initial air void, with the initial air void’s influence the smallest, which indicates that in the process of W-T-R cycle, the main effect factor on mechanical properties attenuation of asphalt mixture is mix design, followed by external environment and construction process.
(3) The order of each factor’s influence on comprehensive mechanical properties attenuation of asphalt mixture is: asphalt-aggregate ratio> W-T-R cycle times> compaction times> the initial air void, indicating that mix design is the main factor that causes mechanical properties attenuation, followed by environmental factor and construction process.

Numerical Analysis of the CFG Composite Foundation’s Mechanical Properties Influenced by Lateral Soil Movement due to Heaped Loads Jing sheng QIAO 1,a, Xiao bo ZHAO 2,b 1Department of Civil Engineering, Tangshan College, Tangshan china 2College of Civil and Architectural Engineering, Hebei United University, Tangshan china aqjs99@sohu.com, bxiaobo113@126.com Key words: heap loads; soil lateral displacement composite foundation; numerical analysis Abstract: The subject uses finite element analysis method to study on mechanical properties of the composite foundation under lateral soil movement due to heaped loads.
There are mainly includes the following aspects of work content in this research thesis: Through the use of finite element analysis software to establish a three-dimensional finite element analysis model, research and analysis of the various factors, such as the size and the operating range of the heap load, the self-weight of the building, the compression modulus of the soil, the elastic modulus of the CFG piles, which under the lateral soil movement due to heaped loads, effect on mechanical properties of the CFG piles composite foundation.
And main conclusions are drawn as follows: the size and the operating range of the heap load, the compression modulus of the shallow soil layer are the main factors to affect the mechanical properties of the composite foundation that under lateral soil movement due to heaped loads.
Introduction The study on the influence of nearby pile by heaped loads is a complicated pile-soil interaction issue[1]~[3], Based on previous study, establish three-dimensional numerical model of CFG composite foundation’s mechanical properties influenced by lateral soil movement due to heaped loads, by taking into account load conditions, soil properties, analyze each factor of affecting the state of CFG pile composite foundation mechanics character[4]~[5].
When the heap load is applied near to the existing CFG piles composite foundation, and when the width and the operating range of the heap load are determined , the heap load size will directly affect the deformation of the soil, and this deformation will have a direct impact on the mechanical properties of the piles.

The essential factors affecting the fluctuation and its extent are investigated from the point of view of material sciences.
To reduce the fluctuation and improve the mechanical properties of the recycled aggregate concrete, effective controlling and processing measures are suggested and discussed.
The number of the interfaces in recycled aggregate concrete increases with the increasing proportion of recycled coarse aggregate, which affects the stress-strain curves significantly and leads to a remarkable fluctuation of the mechanical and the physical properties of the recycled aggregate concrete.
Therefore, the fluctuation of the mechanical and the physical properties of recycled concrete is considerable.
To improve the mechanical properties of the recycled concrete, the improvement of the interface properties of the recycled aggregates is essential.

Mechanical Properties of Cement Concrete under Corrosion Fatigue Bowen Guan1,a,Shuanfa Chen2,b,Rui Xiong1,c and Yanping Sheng2,d 1Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang’ an University, Xi’ an 710064, China 2School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China aguanbowen2001@163.com, b1090626226@qq.com, c346842184@qq.com, d26701080@qq.com Keywords: Cement concrete, Sulfate corrosion, Fatigue, Mechanical properties.
The related factors water-cement ratio affecting the performance of cement concrete under corrosion are also studied.
In this study, results of the mechanical properties of cement concrete under corrosion fatigue and the related factors water–cement ratio affecting the performance of cement concrete under corrosion is reported.
Fig.4 Flexural strength under different condition Fig.5 Factors under different condition From Fig.4, it can been seen that compared with strength of cement concrete under standard condition, the strength of cement concrete under corrosion and corrosion fatigue are descreased by 4% and 31%, respectively.
Influence Factors: Water–Cement Ratio.

Research of Particle Mechanics Application Based on Conveying Machinery Zhiqiang Xu1, a 1Department of Physics, Kunming University, Kunming 650214, China ax13808736648@aliyun.com Keywords: Conveyor; Mechanical properties; Mechanics.
The friction and wear of the conveyor is one of the factors affecting their life.
In this paper, some qualitative research on the mechanical properties is carried out, starting from the application of the conveyor belt. 1.
Excellent mechanical properties and mechanical properties The belt conveyor has generally occurred in a continuous delivery system, which is due to the adaptability of its many advantages, such as virtually unlimited capacity, economy, safety, versatility, reliability and the need to consider the environment .
People should take the actual situations into consideration and establish the mechanical models, highlight the main factors, ignore secondary factors.

The aim of this investigation is to determine the factors that affect measured values of indentation hardness of individual microstructural components and global mechanical properties of thin steel sheets.
The distances between the indents were 10 μm (Pmax = 5 mN, local mechanical properties) in the 11 x 10 matrix and 100 μm (Pmax = 100 - 500 mN, global mechanical properties) in 3 x 1 matrix, respectively.
Factors based on material properties Effect of indentation size effect (ISE) We have to consider the ISE because ISE is significant when maximum indentation depth is lower than 10 µm [7], Table 4.
Individual affecting factors have approximately the same standard deviation of measurement.
Veles, Mechanical properties and material testing, second ed., Alfa, Bratislava, (1989)

Four factors with three level Box-Behnken response surface design was employed to investigate the influence of whey protein isolate, sodium caseinate, glycerol and potassium sorbate concentrations in antibacterial films on mechanical properties, optical properties and water solubility.
Among all the film-forming components, glycerol and sodium caseinate were important factors to affect these packaging properties.
The main factor affecting tensile strength and Young’s modulus was the percentage of glycerol.
Mechanical properties.
Mechanical properties.

Cause and Effect of Factors Affecting the ΔKth of Small Crack Y.Kondo Department of Intelligent Machinery and Systems, Kyushu University 6-10-1, Hakozaki, Higashi-ku, Fukuoka, 812-8581, Japan ykondo@mech.kyushu-u.ac.jp Keywords: Fatigue, Fatigue limit, Small crack, Threshold stress intensity factor Abstract.
The threshold stress intensity factor (ΔKth) of small crack is affected by various factors, especially by material hardness, stress ratio and crack size.
The cause and effect of these factors were investigated.
Chemical compositions and mechanical properties are shown in Table 1.
Chemical composition (wt.%) Mechanical properties (MPa, %) Material C Si Mn P S Ni Cr Mo Cu σy ,σ0.2 σB δ φ HV S25C 0.26 0.20 0.50 0.008 0.023 0.02 0.02 - 0.01 305 544 34.3 59.3 141 S45C 0.45 0.22 0.78 0.020 0.021 0.01 0.15 - 0.01 585 790 27.1 60.9 261 SCM435 0.35 0.19 0.75 0.022 0.014 0.02 1.09 0.19 0.02 870 989 22.4 65.4 305 SCM440H 0.40 0.18 0.81 0.016 0.015 0.06 1.09 0.15 0.08 1003 1124 18.0 54.0 335 SNCM439 0.40 0.19 0.83 0.028 0.008 1.60 0.78 0.15 0.12 1128 1201 17.1 52.2 386 Table 1 Chemical compositions and mechanical properties of test materials.