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Test combination design for the main control factors of the cement concrete strength was executed based on orthogonal test method.
The results show that the chiefly control parameter of affecting concrete strength is water cement ratio and the following are sand ratio and the coarse aggregate grading.
It can effectively distinguish the test factors, the primary and secondary function and trend of test index, and select the optimum combination of the optimum level of experimental factors and experimental factors[6].
The analysis reveals that the influence of water-cement ratio in three factors is the greatest to concrete compressive strength.
Binjing.Concrete technology (China Communications Publications, Beijing 1996) [6] Standard Test Methods for the mechanical properties of ordinary concrete (GB / T 50081-2002)

In time past, designs of shafts were conservative in approach as relatively low working stresses were employed to cover up for unknown “Factors of Ignorance”. [1].
The factor so chosen is the factor of safety.
This range will be higher if there are only approximate values for shaft loadings, geometry and material properties or if there are grave consequences for shaft failure.
The factor of safety employed in the design of shafts depends on factors such as degree of safety required, materials used, purpose of shaft, accuracy of the values used in computing the loadings, geometry, mechanical properties etc.[3]
“Mechanical Engineering Design”, Fifth Edition.

Effect of molding parameters on the mechanical properties：Fig.2 showed the effect of molding parameters on the mechanical properties of LPMC products.
A moderate pressure holding time could increase the curing degree and improve the mechanical properties of LPMC parts.
Seen from Table 2, the molding parameters had a great influence on the mechanical properties of LPMC parts.
In the process of practical production, the moderate clamping time should be set according to the flowing property of LPMC sheets to obtain good mechanical properties.
During the curing process of LPMC, pressure holding time and molding temperature were the key factors to affect the curing degree of LPMC parts, which was directly related with its surface quality.

A number of factors determine the properties of dispersion, such as the type, geometrical parameters and dosage of CNT [1].
One key factor affecting the quality of dispersion is applied plasticizer.
The properties of this dispersion with ultrasonication treatment (D2) were studied during research as well.
Ou, Mechanical properties and reinforcing mechanisms of cementitious composites with different types of multiwalled carbon nanotubes, Comp.: Part A 103 (2017) 131–147
Li, Mechanical properties and microstructure of multi-walled carbon nanotube-reinforced cement paste, Const. and Build.

The mechanical wear because of the steel impact during the transfer of the metal and the parameters affecting it, is another phenomenon which occurs in the bottom region.
The factors were rotation speed, steel temperature and steel composition.
The presence of iron oxides and slag attack, the effect of vacuum and atmosphere and the impregnation-spalling are the corrosion factors.
Excellent mechanical, thermal and chemical properties are exhibited by carbon containing refractories in the metallurgical industry.
These phases strengthen and toughen the structure to improve mechanical properties.

Study of Micro-Mechanical properties of Alloyed Surface with TiNi Layer Considering Shape Memory Effect Zh.M.
This can be achieved using the properties of shape memory alloys and developed alloying technology [2, 3].
Already developed technologies for surface modification [4] and doping technology welds materials with SME to improve functional and mechanical properties of materials [5,6].
In certain modes of the plastic deformation, not only the alignment of the mechanical properties of welded joints and their approximation to the properties of the parent metal occurs, but also the grain orientation directions, the most advantageous with the cyclic axial loads.
Plastic deformation modes also affect the functional properties of the compound.

These coatings aim to enhance the properties of traditional metallic materials.
Key factors include gases flow rates and the fueltooxygen ratio (F/O).
Considering that spray parameters influence the thermal transfer and impulse of sprayed particles, affecting coating properties, process parameters must be optimized for each powder type and specific application.
The mechanical properties of 10CrMo9.10 steel vary depending on the thickness of the material, but in general, the tensile strength (Rm) is between 480 to 630 MPa and the minimum yield strength (ReH) is between 250 to 310 MPa.
Spray parameters influence the thermal transfer and impulse of sprayed particles, affecting coating properties, process parameters must be optimized for each powder type and specific application.

Properties of the load bearing structure as well as natural factors were also taken into account in assessing the suitability of the used mortars.
Experimental method and results Basic properties.
Table 1: Comparative results of mixing plaster samples Samples NJ NS O Properties joint surface Porosity [% wt.] 23.1 20.6 Bulk density [kg/m3] 1820 1800 Matrix density [kg/m3] 2370 2270 Actual moisture content [% wt.] 12.2 6.1 9.2 Moisture content (by vacuum saturation) [% wt.] 12.7 11.4 Basic properties of the new mortars are very similar.
Their consistency and strength were therefore lower than the original mortar, which showed good mechanical properties.
The moisture survey of masonry shows that the wall is generally affected by high humidity.

Distributions of the thrust force and hole delamination factors for various drills and cutting parameters were obtained.
The carbon fiber content in the CFRP is 70%.The physical and mechanical properties of the CFRP T700/6101 are shown in Table 1.
Main mechanical properties of T700/6101 CFRP material.
The diameter D, rotating speed n and feed speed Vf were used as the 3 independent experimental factors.
Cutting fluid degrades the mechanical properties of the composite materials.

An Experimental Investigation of Effect of Process Parameters on Materials Removal Characteristics in Fluid Jet Polishing Zhong-Chen Cao1, a and Chi Fai Cheung1,b 1 Partner State Key Laboratory of Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong a charles.cao@connect.polyu.hk, b Benny.Cheung@polyu.edu.hk Keywords: Fluid jet polishing, material removal rate, ultra-precision machining, process factors, tool influence function.
They are mixed to become a slurry by mechanical stirring in a tank.
To study the effect of slurry pressure, standoff distance, and impingement angle on the polishing tool influence function, all these experiments were conducted by changing one process factor and keeping the other process factors constant as shown in Table 1.
The material property of the polished surface is also a factor that should be considered when understanding the effect of the standoff distance on the influence function.
Lee: Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture Vol. 224 (2010) p.59