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Online since: September 2009
Authors: Chuan Zhen Huang, Zeng Wen Liu
This investigation aims to experimentally find out the reasons causing grinding wheel wear and the factors influencing smoothness.
The present work is to analyze the reasons causing grinding wheel wear and the factors influencing smoothness respectively according to the change of the dimension of the grinding wheels and the smoothness of the surface of stone products, which is used to decide the grinding technology for granite.
Under a certain processing technology, the reasons which influence grinding wheel wear can be found by means of the change in diameter of grinding wheels and the factors which affect smoothness can be analyzed by means of the change of the smoothness of stone surface machined.
The mineral content and the physical property of the stones are shown in Table 3.
Factors Influencing the Smoothness of Stone Surface.
Online since: September 2019
Authors: Janak Mistry, Artem Osipov, Victor A. Klinkov, Margarita G. Dronova, Aleksander V. Semencha
At the same time, from the analysis which is carried out by us existence of a set of factors which influence on physicochemical characteristics of chalcogenide glasses is visible.
Studying of the main mechanical characteristics (density, microhardness, Young's modulus module), thermal properties (vitrification temperature), optical properties (index of refraction, edge of absorption), water dissolution.
Some properties of glasses in the As2S3-Br-I system are presented.
It can be seen that this affects the optical properties of the glass.
As a rule, this changes the width of the forbidden zone, the degree of amorphous glass, and also changes the mechanical properties of glass.
Online since: January 2019
Authors: Mariya Matrunchik, Anna A. Pershina
It is demonstrated that the weld penetration shape factor depends on the laser beam fluence and the pulse duration.
In its turn, the weld penetration shape factor effects the quality of obtained irradiation zones.
The concentrated energy flows are widely used in processing surfaces of various materials to improve hardening, wear resistance, mechanical and fatigue strengths in their surface layers.
Owing to residual austenite to martensite reversion during the pulsed laser irradiation, these steels can be used as hardening wear-resistant coating on friction couples [11-12].To our knowledge, current research is focused on influence of energy parameters of electron beam or plasma arc on the structure formation and properties of such coatings.
Degterev, Structure and properties plasma-powder coating, Bulletin of the Tomsk Polytechnic University.
Online since: November 2011
Authors: Peng Chen, Ai Qin Tian, Yong Hong Chen
Residual stress is an important factor in quality of the welding joints.
Residual stresses do not only affect the corrosion, cracking and fatigue strength in the mechanical properties of the welding joint, but also greatly affect physical mechanical characteristics of material, Therefore, the quantitative residual stress state obtained is very important for the welding structure designers, manufacturers and users.
Experimental test is authenticity, but can’t avoid the effects of human factors, environmental factors on the test results, the results of different measurements are different even using the same model.
That is to say, the correlation between the material properties and temperature should be taken into account.
The physical parameters at different temperatures are shown in Table 2[5] [6] Table 1 Chemical composition of A6N01S-T5 (wt%) Si Fe Cu Mn Cr Zn Ti V Mg 0.60 0.13 0.009 0.11 0.0021 0.03 0.034 0.010 0.64 Table 2 Material properties of A6N01-T5 Temperature(℃) 25 100 200 400 600 611 660 Thermal conductivity W/(m·K) 180.48 185.33 189.53 194.47 197.45 197.37 87.16 Heat capacity J/(kg·K) 0.9 0.94 0.99 1.07 1.21 2.21 1.17 Density(g/cm3) 2.7 2.68 2.66 2.62 2.57 2.57 2.39 Modulus(GPa) 67.54 64.65 60.79 25.4 7 5 1 Yield Strength(MPa) 210 185 110 30 12 5 5 Poisson's ratio 0.339 0.342 0.347 0.358 0.373 0.374 0.498 Heat source parameters.
Online since: August 2009
Authors: Cong Da Lu, Shao Fei Jiang
Considered the weight differences in attribute sets, plus the weighting factor, we get the weighted Euclidean distance: ∑ ∑ = = − = n i i n i i b b i a a i ba n ixix xxd 1 2 1 22 ))](())(([ ),( λ λ µ µ (2) )(xµ is the membership function indicated the state of object properties.
So the attributes reflected cost should choose factors which are interrelated with manufacturing process and strongly affect cost as possible.
The above parameters can be used as association factor of estimation.
In such condition the level ratio factor must be taken into consideration to ensure the reliability of estimation results.
It provides a reliable foundation for estimating the affect that estimation samples exert on estimation results.
Online since: August 2013
Authors: Hai Jun Li, Hui Qing Zhang
Slope has caused huge life and property losses of our country and people.
Taking Suoertou landslide as an example In this paper, on the basis of investigation and study, general situation of Suoertou landslide is introduced, then the stable state is analyzed, calculated and evaluated, the conclusion is a depend basis for later treatment. 1, Introduction Land slope is one of the highest frequency and most damaging geological hazard, once the land slope lost its stability, it can cause huge life and property losses of people, and the safety of all kinds of engineering.
Its physical and mechanical properties are not good, strong permeability, poor stability 4, Analysis of Formation Factor for Suoertou Landslide There are many formation factors for Suoertou landslide, including natural and human factors, the major are type and properties of landslide, soil structure, geological Structure, effects of wind and water, seismic and human engineering activities. ① topography and geomorphology Topography and geomorphology is one of decisive factor that affect landslide development, suitable slope and a certain height difference are the basically terrain condition for landslide becoming.
Upper gravel soil is mainly to the rubble and gravel, its structure is aerial construction, the state is loose, ground cover is  sparse, it is good for surface water infiltration and circulation; lower layer carbonaceous slate clastic is very crushing affected by fault structure and slide perturbation, and the layer is easy soften and sludging when meet water, it has a poor engineering properties and belong to the facility-sliding strata; landslide bed is mainly to the carbonaceous slate, because of the effect of Pingding-Huama great fault, the layer has a fragmentation body, messy occurrence and developed joint . the above mentioned decide the occurrence and development of the landslide. ③ the condition and action of surface water and groundwater The leading edge of Suoertou landslide is facing Bailong River, it is directly scouring and erosion of the Bailong river, the width of the river is 18-30m in this place, and it has a strong capacity of erosion and side corrosion.
Online since: December 2013
Authors: Rui Tang Guo, Wei Guo Pan, Jie Nan Hong, Han Cheng Luo, Hong Lei Ding, Chao Lin Shi, Fu Xiao Li
As the traditional electrostatic precipitators has low removal efficiency of submicron particles, so we improved the supply conditions of the precipitator, and pre-charged to improve the particle properties.
Bag filter attracts the attention at home and abroad for that it’s immune from flue gas composition, specific resistance and other properties of the dust and without secondary pollution.
The combination of ESP and bag filter also can accommodate wider range properties of the fine particles by adjusting the respective load.
Besides, electric coagulation process is more complex, and there are many factors affect the performance of coagulation, such as the initial particle size distribution, pre-charged condition (the number and frequency of the charge, polarity and symmetry), the applied electric fields (such as whether applying electric field, electric type), etc., which limits the electric agglomeration techniques used in industry [15].
Chinese Journal of Mechanical Engineering ,2003,23(1):145 – 149.
Online since: October 2014
Authors: Shou Xu Song, De Qiao Yu, Hui Cha
It provides important mechanical foundation for further research on the mechanical force desulfurization of material.
Stress-strain curve Material Properties Define The Basic Material Properties Table 1.
Basic parameters of rubber Density Shear modulus Poisson ratio 1.15e3(Kg/m3) 1.3(MPa) 0.47 Construction and Model Parameter Fitting of Constitutive The accurately measure of the mechanical properties of rubber material and construction of constitutive model is an important guarantee for finite element analysis reliability.
Journal of Mechanical Engineering, 2011,57(7-8):622-632
Experimental study on dynamic mechanical properties of fiber reinforced high strength concrete[J].
Online since: May 2013
Authors: Qiang Wang, Fang He, Kong Jun Chen
Fig. 1 Schematic diagram of strip wound prestressed die In the design procedure of strip wound prestressed die base on fatigue theory, there are many factors can affect the performance of die, including allowable safety factor named [n], friction coefficient of strip named f, thickness of strip named t, as well as material properties and die structure.
The greater the range, the larger the influence of factors on the results of the fatigue design.
The factor which has biggest range is the main factor.
According to the data in the table, the order of which the influence of factors on the results of the fatigue design is B>C>A, B is the main factor.
The main factor is allowable safety factor named [n].
Online since: August 2014
Authors: Peng Gao
These iron oxide scale not only directly affected the steel plate surface quality and yield, but accelerated the roll wear.
Therefore, clearing oxide scale in time before rolling and in the rolling process had become an important process affecting the surface quality of steel plates.
The final rolling temperature directly affected the internal physical structure and mechanical properties of steel plate.
Wei Sheng-nan[10] considered that the jet water flow was a major factor influencing convective heat transfer coefficient, and deduced the corresponding formula.
In summary, the above authors studied mainly the relationship between high pressure water convective heat transfer coefficient and the steel plate surface temperature ,water density or water flow, water pressure, and considered one or two factors to calculate the convection heat transfer coefficient.
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