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In the long-term use process, bridge not only by atmospheric corrosion and high-low temperature impact and other natural environmental factors, but also by the heavy load and dynamic load work environment, therefore, it is hard to void produce damage phenomenon gradually.
Performance requirements of bridge structural adhesive Enterprise department also stepped up engineering supervision Successively formulated as promulgated many construction standard and acceptance standard in order to ensure construction engineering quality and service life and ensure that the people's life and property safety.
In order to meet bridge engineering construction and the bridge itself various performance requirements, segmental assembly method used in the bridge construction epoxy structural adhesive must has the following properties: (1)Bridge construction using Segment assembly method including multichannel process as brushing and tension , the adhesive which used should meet the requirements of the various processes for a long period of time, as epoxy adhesive suitable time more than 3 omin, preliminary cure time more than lh
(4)Bridge general service life is 30-50 years, even longer time, adhesive should have good aging properties and resistance to alkali corrosion, etc (5)Do not contain composition which on the rebar corrosion and influence the durability of concrete construction, does not contain solvent can be volatile The pull bond strength of sticking steel reinforcement with structural adhesive and concrete must be more than equal to 2.5 MPa, and damage of concrete cohesive failure is Clearly defined in the 《Specifications for strengthening design of highway bridges》(JTG/TJ22 - 2008).But as a result of new process a wide range application time is not long, the used structural adhesive research material are very few, and the factors affecting the performance of structural adhesive is relatively complex, it is necessary to carry on research on the bridge reinforcement with structural adhesive composition, performance and application., The mechanical performance of the bridge reinforcement with structural
adhesive must meet the bearing capacity requirement of reinforcement structure.In the use process of structural adhesive , first of all guarantee should be its use mechanical properties, then consider other characteristics, such as low viscosity, high temperature resistant and good durability.Excellent mechanical properties means that the reinforcement of bridge structure to achieve the original bearing ability level, so as to ensure the use requirements of the bridge structure.

In order to reduce appropriately the memory space and computing time required and ensure the accuracy of analysis results, some minor details such as chamfers, fillets, bolt holes, etc can be omitted and only consider the most of the major factors of model when the solid model to be simplified.
The material properties of the whole system are shown in table 2.
Material properties of comprehensive fault simulation test-bed Material name Elastic modulus /Mpa Poisson's ratio Density /kgm-3 Corresponding parts aluminum alloy 70000 0.35 2700 Base, bearing, support steel 210000 0.3 7800 Shaft, rolling bearings Fig. 1.
The model is meshed free according to the material properties of each of the parts, and the grid about the axis and rolling bearings in thinning, the finite element model of rotor-rolling bearing-base is shown in figure 4.
Li: Mechanical Engineer .2010, 5:14-15

The fine blanking process with stepped-edge punch is affected mainly by sizes of the die.
The negative clearance 'c (Fig.1) is an important factor affecting the hydrostatic stress of deformation zone.
The positive clearance c shown in Fig. 1 affects the separation of the part and the size of burr.
The other parameters of the forming tools and the mechanical properties of Q235 steel are given in table 1 and table 2 respectively.
Meda: Mechanical Study, Vol. 1 (1958), pp.140

All material properties required for the simulation are summarized in Table 1.
The software also allows for the complete design of wedges and probes; however, it is advisable to read the available probes from the library to specify the exact dimensions and properties.
Simplification options of modelling should be applied without affecting the relevant parameters.
The only limitation of this type of POD curve generation is that it does not take into account the impact of organizational and human factors.
However, it should be noted that this only applies to the performance of the testing technique and does not address the impact of human and organizational factors.

In the studied conditions it was observed that hydroxyapatite layer has influence on corrosion resistance properties.
Kroll in 1946, demonstrating their excellent biocompatibility, corrosion resistance and high mechanical strength, making them the most used biomaterials.
Moreover, different techniques are currently being used to obtain coatings of biotolerable materials with mechanical strength and with a bioactive layer [9-12].
However, the alterations introduced in this layer during the coating process can affect corrosion resistance, which is one of the main factors that renders titanium an excellent biomaterial [1,5,6].
Thus, physical properties of the coating, such as size, morphology, present phases, crystallinity, and thickness, must be evaluated.

The reliability of a technological system is determined by all the factors involved in its implementation - the design, realization and exploitation of the system.
The reliability of a technological system is determined by all the factors involved in its implementation - the design, construction and operation of the system.
It is recommended to identify the factors that affect their consequences and credibility and to consider the existing means of control, their effectiveness and their effectiveness.
This property of preserving in time the performance of a technological system under specified exploitation conditions is conditioned by the cumulative and random action of a complex of material and human factors characteristic of all the successive phases of the operation of the respective technological system.
The hazard from emissions of hazardous substances depends on their physicochemical and toxicological properties, the exposure time, and the meteorological conditions that determine their dispersion in the low atmosphere.

All of these factors mean that welds are a focal point for damage including fatigue cracking.
In the safety factor approach the weld is assumed to have the same properties as the parent material and the possibility of this not being correct is accounted for by large safety factors within the conservatism of the design.
These safety factors can only be justified as protection against wear and corrosion.
If these damage mechanisms are not important then safety factors lead to unnecessarily thick section and heavy designs
An estimate of how much each of these details affects the S-N curve is then provided.

IPS e.max Press was most obviously affected by post-core materials, while Upcera Zirconia the weakest.
Noble metal alloy with excellent biocompatibility and mechanical performance, is widely applied for post-core crown or bridge.
Light-cured composite resin has excellent property and has become the substitute for metal prosthesis.
Therefore, it is an important factor of selecting an optimum post-core to accurately reproduce the color of natural tooth.
So, the overall color of Zirconia is less affected by background.

Despite many flaws, including the omission of magneto-mechanical material properties in data analysis algorithms [19], the MMM method is also used to diagnose the technical state of ferromagnetic and paramagnetic objects and to forecast the risk of accelerated material fatigue.
Newnham: Properties of materials.
Burrows: Correlation of the magnetic and mechanical properties of steel (Scientific Papers of the Bureau of Standards No 272 1916)
Sandford: Effect of stress on the magnetic properties of steel wire (Scientific Papers of the Bureau of Standards No. 272 1916)
Ibrahim: Electrical and Magnetic Properties of D6ac Steel.

In the solvent extraction step, various influence factors, such as pH of solvent, treatment time, and temperature were studied respectively.
Introduction Activated carbon (AC) possesses amazing absorption properties due to its abundant porous structure, high specific surface area, and functional groups on the surface.
Solid-to-liquid ratio is one of the important factors which has an impact on AC regeneration.
Meanwhile due to the large filtrate volume, the load and the cost of the mechanical separation unit can be enlarged.
Another important factor affecting the RE is the processing time with solvent.