Search results

Based on the results of testing the samples, mathematical models have been developed which describe the dependences of the physical and mechanical properties of the cement com-posite material samples on the fraction of waste and water-cement ratio.
Variation intervals of factors x1 and x2 Factors Variation levels -1 0 +1 The proportion of powdered optical discs waste from the filler weight (factor x1) 0 0.25 0.5 Water-cement ratio (W/C, factor x2) 0.45 0.55 0.65 Dispersion of the mixture components and compaction during molding was carried out manually.
Results and Discussion Based on the data obtained as a result of testing the samples, mathematical models have been developed that describe the dependences of the physical and mechanical properties of the samples of cement composite material on the above factors.
The possibility of using the maximum possible amount of waste without significant deterioration of the physical and mechanical properties of fine-grained concrete is noteworthy.
The physical and mechanical properties of the cement composite material with a filler in the form of powdered optical discs

The mechanical property can be influenced remarkably by a few non-metallic inclusions [1].
Main reason of the steel crack generation is the inclusion in the steel which also has the prodigious influence for quality and mechanical property of steel.
In non-metallic inclusions, the sulfides are the source of cracks generally, and the cracks in steel are enlarged when the sulfides are combined with other factors.
The second sulfide is very like the bar and distributes between the dendrite, which is harmful to mechanical properties of the steel.
This inclusion influence on steel mechanical properties is between the first and second kind inclusions [8-9].

Al/Mg alloys have been attracted significant attention because of their excellent mechanical properties.
The behavior of materials under dynamic loading depends strongly on the strain rate [17] and the composition that affects the microstructures as well as the other factors.
From our simulations, we obtain the mechanical properties of Al/Mg phases with different percentage of Mg.
Ec is the cohesive energy, α0 is the equilibrium lattice parameter, A is the scaling factor for the embedding energy, α is the exponential decay factor for the universal energy, β(0-3) are the exponential decay factors for the atomic densities, t(0-3) are the weighting factors for the atomic densities, Cmax and Cmin are screening parameters, ρ0 is the density scaling factor that is relevant only for element pairs. [38].
One of the fundamental questions if the structure and mechanical properties of these phases as a function of chemical composition influence their mechanical properties.

Such coatings are reported to provide excellent physical and mechanical properties.
Introduction EL coatings consisting of metal/metal plus metalloid/non-metals are reported to provide excellent physical and mechanical properties.
Fig.1 Sectional view of EL coatings on Fig.2 SEM of EL Ni-23.4 at % P deposit both sides of substrate In another study [13, 14], the factors affecting the deposition rates and the crystallization behavior of amorphous Ni-B EL coatings have been investigated.
Nano coatings are found to have better adhesion with the substrates and hence improved mechanical and physical properties.
Agarwala, "Factors influencing the deposition rate of Ni-B Electroless Film, Z.

The physical-mechanical properties of chromium coatings from low-concentrated electrolytes with additions of organic substances were studied when comparing with similar ones from standard sulphate electrolyte.
It has been established that the properties of chromium coatings from low concentrated electrolytes are superior to those of standard sulphate electrolyte.
The physical-mechanical properties of chromium coatings depend on the composition, temperature of electrolytes, the concentration of organic additives, the current modes of chromium deposition under constant current, pulsed or reverse deposition in a low-concentration electrolyte [3-6].
Absorption spectra with CrO3 solutions containing CV in the temperature range from 20 to 60 ° C have no differences, i.e. a change in temperature in this range does not affect the working properties of the additives.
Current density of 70 A / dm2 and temperature of 70 ° C with chromium deposit thickness of 20 μm from a low-concentration electrolyte (1.5 g / l H2SO4 + 150 g / l CrO3 + 1 g / l CV) were taken as planning factors.

The deformation within the range of 25-30 % substantially affects surface diffusion layer structure, phase and chemical composition and properties.
Properties of diffusion layers obtained in such way depend on their structure and interstitial atoms content in diffusion zone.
Furthermore, the cold deformation can influence the surface diffusion layer structure, its phase composition, improve layer mechanical properties and change kinetics of layer growth.
The reasons of surface layer mechanical properties rise, phase formation change and interstitial atoms mass transfer increase in deformed Fe-Cr-Ti alloys as compared with undeformed ones lie in distinctions of deformed and recrystallized metal structures.
Therefore, the properties of diffusion layers obtained in recrystallized specimens attributed to this factor.

In order to extract the crack signal of the imbalance-crack coupling fault, and realize the fault diagnosis, the paper mainly analyzes its mechanical properties, and then use wavelet packet to de-nosing, decomposing and reconstructing the acquisition of vibration acceleration signal, and then analyzing the characteristics of frequency domain of the fault signal by using the energy spectrum.
If it is the normally open crack, the stiffness matrix of crack-axis can be written as follows: = (4) Mechanical model.
Rotor rotating machinery due to the influence of mass distribution of materials (such as sand holes or stomata in casting), processing errors, assembly factors and the operation of the uneven wear, erosion or deposition and other factors, or a certain fixed parts imbalance caused by loose parts, resulting in some eccentricity between the center of mass and the center of rotation.
Unbalance mechanical, including static imbalance and dynamic imbalance.
(R / min).Affect the vibration of the imbalance has three main factors, that is, the quality of the rotor m, eccentricity e and rotor omega angular velocity.

The energy absorption capacity of the composites were found to be strongly affected by material properties of reinforcing fibre, type of fabric structure and elasticity of resin.
* Polypox H 030 flexible *-with this component elasticity of epoxy matrix can be adjusted Table 2 Properties of matrix components used for sample preparation Sample preparation.
The differences in fibre-matrix adhesion and in fibre properties (elongation, etc), probably influenced the energy absorption.
The thickness of composites greatly affects the energy absorption capacity during ballistic impact [5, 6, 7, 8].
The number of layers as influencing factor was investigated by drop weight tests and by big bore ballistic tests.

But in the actual use , with the time of material under stress increases, the performance of materials will be decreasing[7], which will result in affecting movement of the hydraulic cylinder .
In order to achieve the reduction of structural deformation, there are several methods: increasing ribs , changing material properties ,or using them both .
New rib Fig10 Total deformation of supporting beam Fig11 Diagram of internal structure of supporting beam Fig12 Total deformation of supporting beam Fig13 Total deformation of supporting beam It can effectively reduce the deformation by changing the material properties, the following three figure(Figure 14,15,16) is the result of the analysis of the change of material properties. ( material used is 9Cr2Mo )Figure14 shows the maximum deformation of the supporting beam is 0.3707 mm,Fig15 shows the deformation of supporting beam which is welded one more rib is 0.3426mm, Fig16 shows the deformation of supporting beam which is welded two more ribs is 0.3142mm.
On the contrary, the safety factor of the facility will be larger than the analysis results.
Mechanical design and manufacturing(2010) [4] Tiejun Wen，Qin Zen，Zhuying Tang.

Preface Building structure detection mainly refers to the mechanical properties of building structures and components (such as capacity, strength of materials, stress and strain, deformation, vibration, cracking and cracks, etc.) used for testing equipment, so the quality of comprehensive analysis and assessment of building structures .
Should be capable of detecting quality control measures Implementation of total quality management approach, on the quality of the various factors affecting the detection of effective control, mainly developed following the detection of quality control measures: 2.1Have a very clear based on the test.
Special circumstances, can provide users with the testing requirements, if existing standards and norms results in a lack of judgment or the results of a method to determine the method is not clear, the user should provide a clear method to judge the results. 2.2 In strict accordance with national standards or product sampling method specification to ensure a representative sample testing and authenticity. 2.3 Inspectors must be taken seriously testing work to enforce the law, adhere to the principle of all test items provide the same quality of service, and departments affected by the relationship. 2.4 Measuring and testing for the detection of all instruments and equipment according to requirements of the relevant national regulations were certificated and traceable to national benchmarks. 2.5 The testing according to national standards or technical specifications prepared a complete test implementation rules, strictly in accordance with the detection implementing rules and regulations
and the relevant provisions of detection work. 2.6 Various factors affecting the detection process to detect quality control are to develop practical methods to ensure quality testing work. 2.7 When the user disagrees with the test results, a sound approach.