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Introduction As one of the most important parts of the wind turbine generator, a good structural design of wind turbine blade is the deciding factor to guarantee the whole generator operates normally.
The maximum stress of the spar cap is far less than 648.7MPa, which is the allowed stress of the glass fiber composites, it shows that the blade lay-up design did not make full use of the mechanical properties of the composites.
The maximum stress of 90MPa which occurs on the spar cap close to the root is far less than the allowed stress of the glass fiber composites, this indicates that the blade lay-up design did not make full use of the mechanical properties of the composites.
(3) The flapwise and edgewise play a main role in the blade vibration while the torsion affects little.

Mechanical Behavior and Durability of Stabilized Soils Yuan Xizhong a, Liu Chengcheng b, Cui Wei c, and Liu Feid Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China axizhongyuan@163.com, blc165163450@163.com, ccuiwei750@sina.com,d 815705050@qq.com Keywords: Pavement; Soil improvement; Fly ash; Carbide lime; FGD gypsum; Strength; Durability.
This paper presents the results of a further systematic investigation on the mechanical behavior and durability of FA/CL/FGDG treated silt from Dezhou in Shandong province.
The chemical composition and physical properties of materials are given in reference [1].
In order to simulate the effect of moisture variation from wet-dry actions on the long-term mechanical behavior of stabilized soil, a new test methods was employed.
Variations in climatic conditions have been recognized by pavement engineers as a major factor affecting pavement long-term performance.

The working condition of jib can be simulated, and the main factors can be retrospect.
The working performance of jib will directly be affected by its performance.
But now for the solid-web telescopic jib weld strength, especially for the study of weld defects still have many shortcomings , in order to predict failure critical value under typical working condition, retrospect the main factors, ensure normal production, avoid the occurrence of major accidents, reduce the economic loss, decide to analyze the weld strength of solid-web type telescopic jib is decided to be analyzed by this paper.
The working condition of Jib also can be simulated, and the main factors can be retrospect.
Mechanical equipment and metal structure Design. (2th ed) [M].Beijing: China Machine Press, 2009

Polyalkylene oxides, in particular, oligotetramethylene oxide (OTMO), which is a simple polyester with good physical and mechanical properties, can serve as this class.
When studying the influence of various factors on the formation of block copolymers, the maximum values ​​of reduced viscosity and polymer yield were taken as the criterion of optimality of conditions.
Bazheva, Synthesis and properties of aromatic polyethersulfones, IJMET. 9 (2018) 1109-1116
Storozhuk, Synthesis and some properties of polycarbonate-polyalkylene oxide block copolymers, Proceedings of universities.
Godovsky, Synthesis and properties of block copolymers, Naukova Dumka, Kiev, 1983

Typical supplementary cementing materials are fly ashes, slag, silica fume and others wastes with pozzolanic properties [4,5,6].
The properties of secondary and recycled aggregate are in many ways different from those of primary aggregate and this could lead to varying properties when incorporated in concrete composites.
The mechanical properties of recycled aggregates are generally lower than primary aggregates and therefore limit their uses, sometimes, to low-value applications.
However, it is now generally accepted that not the mechanical properties but rather a combination of surface texture, mineralogy and particle shape of aggregates and optimisation of the mixture design that influence the composite performance.
Mechanical concrete properties such as compressive and flexural strength were studied.

Xu 1 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, China aaql0916@tom.com Keywords: Cryogenic pneumatic mist jet impinging, High-speed milling, Milling temperature, Titanium alloy Abstract.
Introduction Titanium alloys are more and more widely used in aerospace industry because of their superior mechanical properties, heat resistance and corrosion resistance.
These high temperatures greatly accelerate tool wear and lead to a poor tool life [1]. (2) Maintaining their high mechanical strength even at high temperature results in a stubborn cutting resistance at higher cutting speeds. (3) Superior mechanical strength leads to small tool-chip contact area, which causes a highly concentrated stress and heat generation on the tool nose. (4) Strong chemical reactivity with most tool materials at higher cutting temperature may easily cause tool failure.
But milling temperature is an important factor that affects the machining efficiency of Titanium alloys.
As shown in Fig.5, cutting speed is an important factor that influences the flank wear.

And based on the elastic mechanical theory, the author established the flexing formula of these structures and answered it.
Soil Pressure The main load by the sustaining structure to resist is soil load, but the displacement of the structure is the important factor to influence the soil pressure.
The property of the cement is.
The material of the steel is Q235-A.F, the property is ,.
The first part is related to the initial stress state of the soil body, and the latter one is mainly related to the property of structure, the construction sequence, the soil status and so on. 2.

Equally important was to determine the overall order and morphology of the system to provide a basic understanding of these materials and ultimately find the optimum mechanical properties.
The solution could be polymer-layered silicate nanocomposites (PNCs), which have been repeatedly reported [1, 2] to significantly improve mechanical and physical properties.
The mechanical properties of PP, such as stiffness and ductility, are strongly affected by its degree of crystallinity, which depends not only on tacticity, but is also influenced by thermal history.
The area of cryofracture was coated with gold. 3.4 Mechanical tests In this study, our interest was mainly in specific end-user requirements, which were defined in terms of mechanical properties and fire resistance.
We used an Instron 5566 Universal Testing Machine to measure the mechanical properties.

（5） —Amount of coarse aggregate per unit concrete —Amount of fine aggregate per unit concrete Initially selected mix is showed in Table 4: Table 4 Initially selected mix (Kg) Material Water Cement Fly ash Sand Stone Antifreeze admixture Superplasticizer Dosage 180 340 60 553 1027 16 4 The concrete slump which was crafted according to the above mix design can not be achieved, the slump is too low and liquidity is poor .According to the above formula design method to adjust concrete mix , we can obtain the three groups of formula showed in Table 5: Table 5 Three groups of formula Number Material water cement Fly ash Sand stone Antifreeze admixtures Superplasticizer A Dosage 190 344 60 806 950 13.76 4.04 B Dosage 190 358 64 780 950 14.32 4.22 C Dosage 190 380 67 763 950 17.88 4.47 Test and analysis Test made 150mm cube specimens in accordance with the request in standards for test method of mechanical
properties on ordinary concrete.
Test results and analysis Concrete block which were produced by the above method were tested cube compressive strength pressed the standards for test method of mechanical properties on ordinary concrete..Pressure changes are as follows in Table 6, 7 and 8 .
（2） Under unprotected, A, C formula concrete compared to standard curing concrete strength is low, each period has a certain degree of reduction, A formula can not even reach 35MPa.In the film wrapped, quilt cover curing concrete strength compared to the standard curing and unprotected conditions, concrete strength have increased more .Antifreeze admixtures have important impact to improve the early strength of concrete , and curing of concrete in winter construction conditions is also important factors
(2) Antifreeze admixtures get great influence on the strength of concrete,Visible winter construction concrete strength was affected by the amount of concrete admixtures.and at -15 to -5 cold conditions, more suitable used JH-I-type antifreeze antifreeze to deploy the concrete

These apparatuses are thought for determining macroscopic properties of gas hydrates, such as phase equilibrium and others; such reactors operate in a manner very similar to the devices used from Davy, Villard and de Forcrand when they reproduced for the first time methane, ethane and propane hydrates.
Moreover, the hydrate formation process is a nostoichiometric process, which depends on several factors, i.e. pressure, temperature, associated fluid phase composition, presence or absence of a porous medium, reservoir saturation, etc [4, 5].
Moreover, the continued dimensions of these apparatuses make necessary the consideration of other further factors, which may intervene in the process, which both a potential positive or negative influence [6].
Chemical Engineering Journal, 2008; 135 71-77 [20] Jerbi S, Delahaye A, Oignet J, Fournaison L, Haberschill P, Rheological properties of CO2 hydrate slurry produced in a stirred tank reactor and a secondary refrigeration loop.
Energy & Fuels, 2005; 19 (3) 869-876 [64] Zhang B, Zheng J, Yin Z, Liu C, Wu Q, Wu Q, Liu C, Gao X, Zhang Q, Methane hydrate formation in mixed-size porous media with gas circulation: Effects of sediment properties on gas consumption, hydrate saturation and rate constant.