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In ensuring that the unit can withstand repeated blocking and unblocking, the design analysis and stress analysis of the metal shutter plates are very important factors.
The results from simulation analysis were used with the Taguchi method to obtain the optimal combination of design factors.
In this study, the actual material properties obtained from the elongation experiment were used in the finite element analysis software MSC/MARC.
If temperature factors are not considered, the difference between the use of power algorithms and the direct use of the experimental data is unnoticeable[10].
In our study, the material properties are based on data obtained directly from the experiment.

Physical method Mechanical disruption Mechanical treatment methods of sludge are microbial cell wall shear stress, make the release of intracellular material out so as to promote sludge acidification.
Mechanical methods are generally applicable to excess sludge treatment.
Nah studied the crack before and after the effect of anaerobic digestion using high pressure jet, the results showed that after 3 MPa high-pressure injection treatment, anaerobic digestion of SRT by the 13 days shortened to 6 days, the production of CH4 increased, VSS reduced by about 50%, and have little effect on the effect of process operation and effluent quality, which confirmed the mechanical properties to improve the effectiveness of sludge digestion.
Ultrasonication Ultrasonication is a common technique on extracting intracellular material of living cells, in recently years, ultrasonication get rapid development in the application of pretreatment of excess sludge, the main factors of effecting ultrasonication are ultrasonic frequency, ultrasonic energy, and sludge characteristics and so on.
Tiehm argue that the hydraulic shear stress is a major factor in cracked mud ultrasound.

The bending test results showed the bleached fibers displayed greater flexural properties compared to untreated fibers, where the time of bleaching was an important factor in the treatment process.
Therefore, debonding leads to a decrease in mechanical properties of the natural fiber reinforced composites.
Flexural Properties on neat resin and composite.
Based on composite samples fabricated it was concluded that fiber size in natural fiber reinforced composites does not affect the mechanical properties significantly.
Fukumoto, Mechanical properties of biodegradable composites reinforced with bagasse fibre before and after alkali treatments.

Cohesive sediment deposition for mutation affects estuary channel transport and brings great challenges to dredging project.
Basic physical and mechanical equations.
Experiment verification of consolidation coefficient trend Experimental soil properties.
The soil basic physical properties are listed in Table 1, and the results of particle analysis test are shown in Table 2.
Acknowledgments The authors appreciate the financial support has been provided by “Fundamental Research Funds for the Central Universities” (2009B13514) and Doctoral Fund of Education Ministry “Reaearch of high moisture content and heavy metals by curing mechanical properties” (2010 009411 0002).

Through the experimental research on the use of recycled aggregate and recycled concrete powder, I propose recycled coarse aggregate, recycled powder of various physical and chemical characteristic and the powder mixed with cement slurry mixed with recycled coarse aggregate on the surface of the mechanical properties after treatment.
Recycled coarse aggregate particles have more angular, the surface is rough, more edges in the group that contains a certain amount of hardening cement mortar (cement mortar porosity is big, bibulous rate is high), In the process of broken disintegration, there are a large number of cracks within the concrete block as the cumulative damage., these factors make the holes of recycled aggregate content increased, thus increasing their rate of water absorption Through the bibulous rate test method for the measurement of recycled coarse aggregate bibulous rate and natural coarse aggregate gravel bibulous rate experimental results were 5.31%, 3.30%.
At present, the recycled coarse aggregate crush index can consult the standard of natural coarse aggregate , the crush index according to《the common concrete with sand, stone quality and testing method standard》(2006) JGJ52-the provisions of the methods to determine [3].The strength properties of recycled coarse aggregate depends on its mineral composition, proportion, water imbibition, pore structure.
In this paper the crush index of recycled coarse aggregate is 25.5%, the natural macadam crush index is10%. 3 The surface disposal of the recycled aggregates and compressive strength After crushing，the surface of the recycled coarse aggregate adhere to cement mortar or a small amount of hardening mortar alone into pieces, increasing the aggregate surface roughness, porosity, so this affects the new mix concrete compressive strength and so on the various work performance.
But if the water cement ratio is too big, it will affect the growth of the compressive strength of recycled aggregate, can not reach the purpose of strengthening.

Study of Formability of steel thick plates for offshore structures Kwang soo Park1, a *, Sook hwan Kim2,b and Dong kyu Kim3,c 1Rist Ulsan Laboratory, Megok Industrial Park 3F, Buk gu Ulsan, Korea 2 Rist Ulsan Laboratory, Megok Industrial Park 3F, Buk gu Ulsan, Korea 3Department of Mechanical engineering, Busan National University, Kumjung Gu, Busan, Korea *awinter@rist.re.kr, bweldsh@rist.re.kr, cKusakik@hanmail.net Keywords: Steel thick plate, Jack up Rig, Rack and Chord, Press forming, Roll forming Abstract.
Attainment of mechanical properties is not usually difficult, although procedural trials are advisable.
It is hard to estimate this buckling phenomenon accurately because this is affected by many factors such as flow stress of material, thickness of material, HD (Horizontal Distance) between rolls, bending angle and etc.
By estimating this, die’s property and roll shaft can be designed.

The result shows that the value of the coefficients of the pile endpoint resistance reduces with the rising of the value of depth and the value is affected by the size of the pile head and the soil parameters.
The mechanical properties of soil are so complicated that stress-strain relations of it perform non-linear, elastic- plasticity, visco-elasticity, dilatancy, anisotropy and so on[1].
And many factors such as stress paths, material strength, material construction , material composition and the state ,the temperature of soil influence the coefficient of pile endpoint resistance.
So the key to use small area method is to identify a reasonable coefficient depending on the basic soil properties and it is wrong to identify the coefficient depending on the area ratio of inner and outer pile tips.

Introduction 316L stainless steel has been widely used in automotive, structural, and medical applications attributed to its excellent mechanical properties and corrosion resistance behavior [1].
Previous researches have investigated the factors affecting the densification of rapid heating sintering methods.
Different from the conventional sintering process wherein the sintering of complex green bodies may be predicted by via a continuum mechanical model incorporating sintering stresses and sintering viscosities, the powder system in this experiment was discontinuous at the beginning, namely, when an AC current passes through a compact, each particle becomes a resistance.
Varol, Mechanical properties of P/M 316L stainless steel materials, Powder Technology. 201 (2010) 242-247
Lia, Influence of sintering temperature and holding time on the densification, phase transformation, microstructure and properties of hot pressing WC-40 vol.

It is known that fracture toughness value is affected by test temperature, specimen thickness and loading rate.
Sample material used is HT780 high tensile strength steel; mechanical properties are shown in Tabel 1.
Table 1 Mechanical properties Yield Stress [MPa] Tensile Strength [MPa] Elongation [%] 807 867 19.2 Tensile test specimen shape is 5mm in the test part diameter, and gage length 20mm shown in Fig. 1.
In general, stress intensity factor rate K ．
Murakami: Stress Intensity Factors Handbook (The society of materials science, Kyoto 1987) [4] M.

Since the property of coal bed is with low permeability and hard to achieve industrial flow rate.
It has the characteristics of medium thickness and depth of the coal formation, low permeability, high mechanical strength of the coal rock, and high gas content and saturation etc.
The quantity and length of branch holes are the sensitive man2made factors for affecting productivity, which can be changed by the engineering design optimization to bring the productivity potential of directional pinnate horizontal wells into full play.
The distance between them is approximately 900m, and both wells have similar property.
We points out that reasonable production system and carefully drainage control are the key factor to ensure production successfully, and ur-continuity drainage, superfluous drainage intensity and rapidly depress bottom-hole flowing pressure(BHP) are the main engineering factors to influence CMB horizontal well output in China.