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The durability largely depend on permeability of concrete, and Cl - permeability test can be used to evaluate the permeability. [1] Chloride ion intrusion is main factors that lead to steel corrosion, which determines the service life of concrete structures and is the important issue on concrete durability.
Mechanical properties of compressive strength at different ages, chloride ion permeability of concrete using electric flux test method, the conservation of specimens after 28 days to make a diameter Φ = 100 ± 1mm, height h = 50 ± 2mm of the cylinder specimens tested 6 hours through the concrete test block total power consumption and chloride ion penetration depth.
The incorporation of fly ash will reduce the early strength of concrete, and decreased with increasing dosage, but with the increasing age, increasing strength of concrete; slag powder mixed with the early strength of concrete have a negative effect, with age substantial increase in the intensity of growth; silica fume added on the mechanical properties of concrete was significantly improved.
Figure 3 shows when the gas content <5%, little effect on the mechanical properties of concrete, but when the gas content> 5%, will significantly reduce the mechanical properties of concrete.
Conclusions (1) Air content of concrete increases with the water-cement ratio. when air content is <5%,it has little effect on the mechanical properties of concrete, But it would decrease the mechanical properties of concrete when air content is > 5%

The force influence factors of the deck continuous section were studied by changing parameters, and the corresponding improvement measures were put forward.
Introduction The simply supported girder bridges with continuous deck have a wildly used for both the mechanical properties of simply supported girder bridge and provide a continuous lane for vehicles to ensure a smooth and comfortable driving and play the superiority of continuous beam bridge.
The model beams were simulated with ANSYS to analyze the stress distribution and its influence factors of the structural paving layer under different load conditions, and analyzed the main reason for damage.
The ANSYS finite element models are shown in Fig.2-Fig.3, and the material properties are shown in Table 1.
Table 1 Material properties for modeling Material type Tensile strength(N/mm2) Density(kg/m3) Poisson ratio Thermal expansion coefficient Modulus(N/mm2) C40 Concrete 1.71 2600 0.1667 1×10-5/℃ 3.25×104 Steel 360 7800 0.3 1.2×10-5/℃ 2.0×105 Fig.2 Finite element model axis view of simply-supported beam with continuous deck Fig.3 Bridge deck continuous joint fine grid partition schematic diagram Simulation analysis under all load conditions and influence factors The linear and nonlinear analysis are conducted under all load conditions and influence factors, including automobile live load, global temperature decrease and rise 20℃, and their composite condition.

The analysis of factors affecting the state of the metal of pipelines of heating networks on the territory of hazardous production facilities is carried out, of which the effect of mechanical loads should be especially distinguished.
All these factors lead to deterioration of the mechanical properties of the metal as a result of aging; in addition, various stress concentrators can be present in the metal.
Despite the large number of operating conditions used in the design and strength calculations of main pipelines, all the factors of pipeline operation are often difficult to take into account, since in most cases the calculation results change significantly due to the simplification of the design schemes, inaccuracy of the initial information, changes in operating conditions, etc.
(Moscow: Mechanical Engineering) p 511
[22] Kultaev MA 2018 Innovations in information technologies, mechanical engineering and vehicles.

It is important to take into account two factors selecting a coating material: the thickness of the coating and coating adhesion to the base.
These factors determine its working lifespan and the distribution of the surface stresses in the coating material and base.
We improve mechanical properties by adding modifying nanoadditives based on spinels such magnesium, chromium and zinc to a polymer composition.
Thus, the process of destruction of coating affects not only the phase composition, structure and mechanical properties of the coating, but also the morphology of the interface region between coating and base.
Preparation and Mechanical Properties of PTFE/nano-EG Composites Reinforced with Nanoparticles (2011) Procedia Environmental Sciences, 10, Part B, pp. 929-935

Ball bearings’ qualifications , such as kinematic accuracy, noise and life are directly affected by their precision (surface roundness, sphericity error, ball diameter variation) and then their precision affects performance of instruments and apparatus.
The simulation of ADAMS can be used to predict the performance, range of movement，collision detection ,peak load and inputting load of computing finite element in a mechanical system [6].
Material parameters are defined by their properties.
In the simulation of ADAMS, it simulates as the machining process and considers affecting the lapping track factor, such as properties of materials, pressure and so on.
The vibration of machine and unequal pressure also should be considered when the apparatus is operating .These factors have some impacts on lapping uniformity.

The conductivity of these composites depends on several factors, such as the nature, the type and the structure of the polymer matrix, the concentration of the dispersed conducting particles and test conditions-pressure, temperature, etc.
The properties of the elastomer matrix, nano carbon and nano silica found in manufacturer literature are shown in Table 1.
This revealed adding the nano silica was reinforced insulating properties of matrix.
Fig. 7 show mechanical properties of composite dispersed with various silane treated silica.
Mechanical properties of composite with various surface treated silica

The tensile mechanical properties were tested in WDW-100 microcomputer control electronic universal testing machine.
It is found from Fig.4 that the mechanical properties of the as-cast alloys can be improved greatly by A-EMS.
So the mechanical properties increase obviously by taking advantages of annular electromagnetic stirring casting process.
Comparison of mechanical properties of the test alloys with different casting processes.
It is indicated that the mechanical properties of the test alloy are also increased significantly with A-EMS.

Fig.1 350-meter-high television mast The initial impact of guyed mast structure parameters on Impact of changes in inclination tow rope on the mechanical properties of the mast structure According to the towering structure design specifications, tow rope diagonally arranged inclination generally within the range of 30 ° ~ 60 °.
Here's to 350m television mast, for example, when the tow rope inclination to study the changes affect the mechanical properties of the structure.
Cordelle layers under the influence of the performance of the mast According to the towering structure design manual, tow rope-level layout depends on many factors, in addition to the mast height, shaft interlayer spacing, but also taking into account the structural stability, structure installation and use conditions.
Based on the slenderness ratio is allowed to change the number of layers in the range of tow rope, to study the effects on the mechanical properties of the entire structure.
The various factors are reflected in the above text.

From this study, it was found that the PET-modified mortars exposed to aggressive environments showed better resistance to chemical attack and higher resistance to chloride ion penetration than unmodified one without substantially affecting the mechanical strength in tap water.
Among the threatening factors like freezing and thawing, abrasion, corrosion of steel, chemical attack may deteriorate the concrete [10-12].
The mechanical properties of mortar and composites are also presented.
Factors of rate of acidic attack and protective measures, Construction and Building Materials, 16 (2002) 215-222
Li, Physical and Mechanical Properties of Styrene-butadiene Rubber Emulsion Modified Cement Mortars, Cement and Concrete Research, 35 (2005) 900-906

The article contains information about the function and basic properties of the actuator based on pneumatic artificial muscles.
The task is to review the current status of objects based on an objective evaluation of symptoms identified means of measuring techniques, forecast, conditions and characteristics of the device in use, disclosure degrading factors that could lead to failure.
Static properties of the pneumatic artificial muscle Properties of pneumatic artificial muscles and their mathematical models are in general a relatively complex nonlinear system with several nonlinearities and transportation lag.
Monková, Side milling factors analysis affecting the surface irregularities of high-grade steel E295, Tehnicki Vjesnik 15 (2008) 19-23
Paško, Influence of technological factors of die casting on mechanical properties of castings from silumin, Lecture Notes in Electrical Engineering 240 (2013) 713-722