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Ability insufficiently in shear is one of common trouble of old RC (reinforced concrete) beams, so scientific and reasonable shear resistant reinforcement method is one of the important research topics in the old bridge reinforcement and rehabilitation fields, and is of great significance in improving old bridge’s mechanical properties and reducing safe accidents.
Both dead load level when strengthening and damage degree of original beams are the important factors influencing the shear resistant reinforcement effect , and with increasing of the dead load level and damage degree when strengthening, the improved amplitude of the yield load of stirrups and the shear bearing capacity are getting decreasing.
The influence of shear resistant strengthening is affected by load level, except of design parameter of original beams and the damage degree.
Table 2 The SWR’ Mechanical properties Wire type fpk (MPa) fpd (MPa) Ep (MPa) Galvanized soft wire 1644 1397 120000 Measuring point arrangement.
The dead load level when strengthening and damage degree affect directly the effect in shear with SWR external prestressing.

Results and Discussion The Properties of the Paper Sludge. (1)Basic properties of the sludge The moisture of the sludge was 79.6%, the content of organic matter was 84.6%, the ash was 15.4%, the pH was 6.8 and the fiber of the sludge was 69.6%.
(2)The performance of blending collagen fiber with softwood pulp The oxidized leather crumbs were treated by mechanical grinding.
Fiber length and fiber bonding were the two major factors which affected the bursting strength.
Comprehensive consideration of all the factors of paper performances, the optimum condition of leather crumbs was refining by PFI at 5000r.
Consideration of all the factors of paper performances, it showed that the optimal condition of leather crumbs was refining by PFI at 5000r

And researches show that because of the different structural property, there is great difference in mechanical property between structural soil and remolded loess with the same density and water content, which is obviously different from the critical soil mechanics.
Recent years, many tests of structural property of soil have been taken and proved that the structural characteristic has greater effected on the mechanical properties of soil[1].
(3) Structural is an important factor which affects soil strength together with pressure damage, hydrostatic pressure and shear damage.
Chinese Journal of Rock Mechanics and Engineering, 2006, 25(10): 2058-2064 [9] LIU E.L, SHEN Z J: Experimental study on mechanical properties of artificially structured soils [J].
Chinese Journal of Rock Mechanics and Engineering, 2000,19(6):775-779 [11] HU Z.Q, SHEN Z J: Deformation properties of structural loess [J].

This experiment was conducted using two factors and two levels of design of the experiment setup.
Material properties of Zn-Coated metal sheet.
This experiment was conducted using two factors and two levels as per Table 2 and Table 3.
The affected samples are sample 1, 3, 5, 6, 8 and 9.
Liao, “Microstructure and mechanical properties of friction lap-butt welded ultra-thin galvanized steel sheets,” J Manuf Process, vol. 45, no.

Nozzle is the important component of twin flapper-nozzle valve,the twin flapper-nozzle valve has the symmetrical structure which means there are two nozzles in one valve.The property of pressure difference and flow of the micro-holes have influence on the preformance of the valve.
It requires not only a strictly linear relationship between pressure and folw of the microhole but also a similarity of the property of pressure-flow between two nozzles[3].
Those factors such as unsmoothness of the entrance of the jet hole,not-round of the shape of the hole ,deep honeing pattern of the inside surface will affect the stability of the working liquid passing through the micro-hole that leads to an abrupt change of the flow direction or jet state along with the change of the pressure,thus zero drift of the servo value will increase under different pressure[4].
In addition, heat exchangers are used both in oil cycle and slurry cycle to keep the temperature stable in this system because the viscosity is affected by temperature that will finally affect the machining effect.
It can be seen as a grey system because the flow of the system will be disturbed by many uncertain factors,such as the hole’s surface status,the operating temperature of slurry,etc.The grey model GM(1,1), which can predict only according to the discrete value of the system’s actual output and do not need grasp a priori information of the plant model structure, can get high prediction accuracy in Short-term prediction with less raw data and not more calculation steps[10].

The factors influencing the reliability of the laser-induced code readability have been determined as color and contrast.
It is necessary to use methods of macrophotography [6], optical metallography [7], scanning and transmission electron microscopy [8] to characterize the surface of the materials at issue before and after laser processing and to determine the factors affecting the reading reliability of the codes, as well as the ranges of its stability under thermal exposure.
The codes applied to the brass surface are not resistant to thermal factors and therefore brass is not recommended as a material for applying marking codes.
Sivenkov, Influence of laser marking on the surface properties of steel AISI 304, Metalworking 4(106) (2018) 21-27
Zverkova, Influence of laser marking on changes of the structure and properties of austenitic steel, International Scientific Review 11(21) (2016) 38-40

The prediction results agree well with the measured values. 1 INTRODUCTION Because of coal anisotropy of physical and mechanical properties, as well as the presence of cleat and fissures, the integrity of coal is undermined, and coal is easily broken [1].
This classification standard is not applicable for coal seam with depth of a few hundreds meters, thereby the distribution of coal crushing prediction results is affected.
Because coal classification method and standard are yet been established for the current domestic to guide coal seam crushed zones forecast, internal factors and external factors of coal crushing is not comprehensive enough, and the safety requirements can not be satisfied for coal seam drilling [2-4].
The results show that the crushed classification method is reliable and can meet engineering requirement. 2 HOEK-BROWN CRITERION Hoek-Brown criterion can be expressed as follow [5]: (1) Where, are maximum and minimum principal stress; is uniaxial compressive strength for intact rock; is rock constant; , are the coefficient of rock properties.
Status quo and trends analysis of factors considered in rock mass classification methods.

This difference in structure affects the property behavior of the products made from silica.
From here, Ross [30] took over the study and investigated the properties (especially physical and mechanical) as well as the materials used in the manufacturing process.
It is therefore necessary to investigate the physical, thermal and mechanical properties of refractory produced from nanostructured silica obtained from rice husk ash.
Ross, Silica refractory, factors affecting their quality and methods of testing the raw materials and finished ware, Journal of the Franklin Institute, 187[3] (1919) 353-5 [31] W.
Mohammed, Mechanical and Physical Properties of Silica Bricks Produced from Local Materials, Australian Journal of Basic and Applied Sciences, 3[2] (2009) 418-23 [36] P.

Ahankari1,a Atul Suryawanshi2,b and Udayraj Warerkar3,c 1Associate Professor and Head, Mechanical Department, ADCET, Ashta, Maharashtra, India. 2,3UG students Of Mechanical Department, ADCET, Ashta, Maharashtra, India.
Stacking sequence is one of the important processing parameters on which the properties of filament wound components depend to a large extent.
The performance of filament wound (FW) pipes is very much affected by processing parameters such as winding angle, stacking sequence, stacking thickness, volume fraction of fiber, fiber pretension etc.
Apart from the processing variables, certain service factors like lateral load also affect the overall performance of the component.
Hence it is of prime importance to not only focus on process variables but also the factors that a component might encounter during the phase of storage, transportation, on-field installation and service life.

The interest in the nanotechnology development in the last decade allows the increase in the nanocomposite area due to the special properties presented by these materials.
One of the main factors that control the membrane can separate species is the morphology [5].
The poly (ether imide) is an attractive material for use as membrane, due to its excellent thermal stability, chemical and mechanical as well as its good filmforming properties. 
Results and Discussion The permeation properties of gases O2 and CO2 samples of PEI pure and its nanocomposites were evaluated and the results are shown in Figure 1
With the gas permeation measurements, one can observe that the incorporation of clay affect significantly the values obtained.