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Online since: July 2012
Authors: Chuan Shan Zhao, Xian Qi Sun, Hui Rong Yang
The property of fiber can meet the operation requirements of high speed paper machine.
Handsheets were prepared and their physical properties were tested.
Handsheet properties hand towel will compare to them.
There were two main factors of affecting absorption.
One factor was that the EMP contains numerous lignin, fatty acids, and wax, etc.
Online since: June 2013
Authors: Chun Yan Xia
The results show that the polyurethane concrete also has sufficiently good mechanical properties while it has the characteristic of fast patching.
Orthogonal tests with three elements and three levels were built to analyze these factors fully.
After curing about 5 hours at the temperature of(23±2)℃,the relationship between curing agent dosage and mechanical properties of polyurethane concrete is showed in Fig.2.
Fig.2 Relationship between curing agent dosage and mechanical properties Microstructure of polyurethane concrete.
As a result, polyurethane concrete also has sufficiently good mechanical properties while it has the characteristic of fast patching.
Online since: December 2024
Authors: Pavankumar Yavagal, N.Deeban Chakravarthy, Yash Rawal, Chandana Panji, S.G. Gurusiddayya, Vinayak N. Kulkarni
Mechanical properties of NiTiNOL Material Mechanical Properties Values NiTiNOL Elastic Modulus (GPa) 75 Density (g/cc) 6.5 Coefficient of Thermal Expansion 11 x 10-6 /°C Melting Point 1310° C Modulus of Rigidity (GPa) 28 Table 2 shows the mechanical properties of tool material that is PCD.
Mechanical properties of PCD Material Mechanical Properties Values Polycrystalline Diamond (PCD) Elastic Modulus (GPa) 890-1000 Density (g/cc) 4.12 Thermal Conductivity (W/m k) 540-560 Hardness (GPa) 50 Average Grain size (μm) 10 Grade CTB010 2.2 Design of experiments and Methodology Full Factorial design (L27) is adopted for the study focusing on three factors at three levels—Vc, fr and D.
The enhanced Eq. (2) provides a more accurate prediction of tool life in milling processes, considering the complex interplay of factors that affect tool wear [23].
Similarly, a specific hierarchy of parameters influencing S/N ratios is shown in Fig.6, the main factor affecting the S/N ratio for Deformation is the fr.
Fig.4 displays a particular hierarchy of parameters affecting S/N ratios.
Online since: June 2021
Authors: Guo Qing Zhang, Wen Yong Xu, Zhou Li, Liang Zheng, Yu Feng Liu, Li Chong Zhang
The physical properties of powder mainly include tap density, bulk density and powder flowability.
The powder flowability is one of the most important physical properties which is important to the application.
There are many factors affecting the powder flowability, while the particle size and shape are two main factors.
Discussion The particle size and shape are two main factors affecting powder flowability [18-20].
Effect of particle properties on the flowability of ibuprofen powders[J].
Online since: July 2011
Authors: Yan Wu, Wen Zhong Nie, Er Geng Zhang
As a results, the grit size of grinding wheel, Grinding depth and workpiece mechanical properties are the main technology factors affected the nature and size of the residual stress of ground surface.
Introduction Author’s research group on the study for the ultrasonic machining of engineering ceramics material removal mechanism [1] found that ultrasonic vibration of hard and brittle material ductile machined surface layer formed is not clear in many key issues, constraints of the Precision and Engineering Ceramics implementation process, the ductile processing field ultrasonic vibration and the physical and mechanical properties of the material removal mechanism and other issues of engineering ceramics to further reveal the mechanism of ultrasound and efficient processing of the ductile domain, for high precision machining of new technology plays a vital role.
Theoretically, every factor causing cutting temperature rising has the trand of increasing surface residule tensile stress.
Conclusions At the same conditions for micro-nanocomposite ceramic, surface tensile stress for two-dimensional supersonic vibration grinding is less than that for conventional grinding; residule press stress for the former is more than that for the latter; mechnism of material removal will affect grinding surface residule stress, if the material stress is removed by the way of ductile deformation, grinding surface keeps residule press stress, and if brittle- ductile pattern for the material is removal, due to fracture generated on the surface of ceramic grinding, which releases tensile stress, reduces tensile stress on the grinding surface of material.
Average grits size, grinding depth and mechanical performance of grinding workpiece material for grinding wheel are the process factors of nature and amount of ceramic grinding surface residule stress.
Online since: October 2014
Authors: Miriam Andrejiová, Anna Pavlisková, Anna Grinčová
It is affected by plenty of factors, including above all the quality structure of the belt conveyor, optimal construction, production, and properties of the conveyor belt as such, adequate solution of conveyance route shifting, reasonable maintenance, and quality repairs of conveyor belts.
Conveyor belt Lifetime is affected by plenty of factors: structure of the belt conveyor, construction, production, and properties of the conveyor belt, solution of conveyance route shifting, reasonable maintenance, and repairs of conveyor belts [2,5].
Based on all the facts, it is very difficult to take into consideration all factors that affect the lifetime of the conveyor belt.
There are plenty of factors that affect the overall lifetime, reasons of wearing, as well as duration of individual renewal cycles.
All these factors can be mutually combined and together they may affect lifetime of the conveyor belts.
Online since: March 2017
Authors: Ladislav Kander, Šárka Hermanová, Petr Čížek, Zdeněk Říha
Effect of various welding technology including simulation heat treatment on mechanical and fracture properties have been studied.
Conventional mechanical properties as well as unconventional mechanical properties (fracture mechanics, low-cycle fatigue and stress corrosion cracking in water environment) have been studied.
Required mechanical properties including elevated temperature and transition temperature are given in the Table 2.
In fact real level of mechanical properties was found to be much higher compare to the requirements [1].
· Structure and basic mechanical properties were satisfied compared to technical requirements and standards
Online since: May 2011
Authors: Fang Tian, Wei Xin Hu, He Ming Cheng, Ya Li Sun
But this shortcoming can be improved by incorporating a certain amount of fly ash into the concrete mixture as fly ash is known to be able to enhance the mechanical and transport properties concrete.
The different applications of fly ash produce concrete with totally different properties.
Results and Discussion There are many factors that affect the depth of concrete carbonation, but the main factor is the density of concrete, which affects the CO2 diffusion rate in concrete.
Because there are many complex factors for carbonization, and the data are greatly dispersed, it is difficult to make a statistics on these data to identify the major factors that affect the rate of carbonization.
Table 3 illustrates the affecting factors that yield by applying GRA, which has the greatest influence for carbonation depth.
Online since: August 2013
Authors: Neculai Nanu, Gheorghe Brabie, Maria Bologan
In order to control the springback, the factors that influence its intensity must be known and controlled.
The researches show that the springback intensity depends on material properties, process parameters and tools geometry.
Concerning the process parameters and conditions, the most important factors that influence the springback intensity are the blankholder force and friction between tools and blank [8, 9, 10].
The mechanical properties of the used material in the case of FEM simulations are given in Table 2.
The elastic properties of the blank material were the Young’s modulus and Poisson’s ratio.
Online since: November 2012
Authors: Hong Yan, Teng Fei Xu, Jun Wang
With the combined effect of flowing water and weathering factors, the immediate rock stratum would have lots of fractures and damage the whole roof and supporting strength, leading to the large roof deformation.
For some coal roadways, the fast deformation of the surrounding rock could turn to the final roof caving accidents with the weak supporting structure. 5 4 2 3 1 Fig.1 Roof abscission layer and deformation (1, 2, 3-rock strata, 4- abscission layer, 5-roof deformation) Roof Mechanical Properties Test and the Spraying Water in Drilling-Hole Measuring For the type of coal roadways with water spraying and compound roof, it is important to analyze the roof mechanical properties before determining the supporting design and concrete parameters.
According to the testing results of the roof mechanical properties, the influencing effect of the spraying water to the roof strata could be further researched.
As is shown in Fig.2, the testing results are as follows, (a) uniaxial compression test (b) split test Fig.2 Rock mechanical properties test Tab 1.
From the above testing and analyzing results, the mechanical properties have great discrepancy among them, so the roof deformation might occur, especially to the limestone stratum containing water.
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