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Online since: November 2015
Authors: Bianca Bontiu POP
Starting with the necessity to identify the optimum values of the cutting parameters which are affecting the surface quality, it is appropriate to use the design of experiment techniques to conduct the experiments.
The orthogonal matrix includes these three factors set for analysis, each with 2 levels associated.
So, in this research, the attention will focus on aluminum alloys whose properties are superior to other materials.
Taguchi calls this variability - noise factors [5]; the strategy he uses is not to control these factors (which sometimes can be expensive), but instead to minimize their impact.
Concerning my research, the process parameter combinations (cutting speed, depth of cut and feed per tooth, hereinafter referred to as control factors), will be determined with the purpose of reducing the effects of noise factors rather than focusing on their root case.
Online since: March 2020
Authors: S.K. Kargapol’tsev, V.I. Shastin
To ensure the listed technical requirements for quality when forming friction surfaces, it is necessary to obtain optimal tribotechnical characteristics of the mating surfaces and high physical and mechanical properties [2, 4].
In this case, tribotechnical indicators were compared with the results of metallographic studies and the physical and mechanical properties of the modified layer, in particular, with the microhardness index.
The Mechanism of Wear of Hardened Surfaces While in service during wear friction, the working surfaces of the studied friction pair are affected by force and temperature factors.
It depends on the wear conditions, physical-and-mechanical and tribological properties of the mating materials.
These circumstances largely explain the mechanism and the main factors determining the increase in the tribological properties of the studied friction pair during laser thermal strengthening, namely, by increasing the bearing capacity, increasing microhardness, and improving the wear conditions of the modified layer.
Online since: July 2015
Authors: La Mei Guo, Qiang Li, Wan Zhen Huang, Chao Ling
Slashing and Weaving Properties of Twisted Carbon Fiber Yarns Qiang LI a, La Mei GUO b*, Wan Zhen HUANG c and Chao LING d Key Laboratory of Textile Science & Technology, Ministry of Education College of Textile, Donghua University, Shanghai 201620, China alllq1006@163.com;b lmguo@dhu.edu.cn; czjyhwz_1314@126.com;ddhulc2140002@126.com; Keywords: carbon fiber yarns; slashing properties; desizing; weaving properties; Abstract.
Mechanical properties of polymer composites primarily depend on the fiber/sizing and sizing/matrix interfaces even though they are also affected by the original nature of the fiber and matrix resin.
The tensile property of the slashed yarn is an important factor to evaluate sizing property [10].
Results and Discussion The basic properties of carbon fiber yarn.
Besides, the hairiness on the surface of the original yarns were messy, it will seriously affect the weaving property of the carbon fiber yarns.
Online since: August 2020
Authors: Iim Fatimah, Dicky Anggoro, Tri Ilma Sari
Electrospinning process is influenced by several factors including the concentration of the solution, conductivity, viscosity, volatility, surface tension, electric field strength between the needle and the collector, feed/flow rate and environmental conditions such as temperature, humidity and air composition.
Electrospinning parameters affect the diameter and morphology of the fiber.
Summary In this study, the concentration of solution affects the morphology of nanofibers . 
Wei., One dimensional conducting polymer nanocomposites:synthesis, properties and applications, Prog.
Dijkstra, Electrospinning of continuous poly (L-lactide) yarns: Effect of twist on the morphology, thermal properties and mechanical behavior, J.
Online since: March 2021
Authors: Si Bin Zhang, Ze Chao Jiang, Qing Chao Tian
Without the control of vibration, the machine may be unstable thereby affecting the normal operation of the entire unit [1].
The internal factors of the alloy embody in the composition of the alloy and the microstructure after heat treatment, while the test parameters are generally specified by the amplitude, frequency and temperature applied to the mechanical vibration [4].
Obviously, the mechanical properties of both S316L and M2052 are excellent, while that of cast iron is poor in tensile strength and total elongation.
Adams, Correlation of the damping capacity of cast iron with its mechanical properties and microstructure, J.
Wu, Effect of alloying elements on microstructure, mechanical and damping properties of Cr-Mn-Fe-V-Cu high-entropy alloys, J.
Online since: August 2013
Authors: Yan Chen, Ming Hong Bian, Hui Bo Luo, Guang Bin Ye, Xiao Dong Yang, Yi Wang
Among kinds of biodegradable plastic, PHAs which were produced by microorganism were a hot area of research on Application of environmental biology because of its special material properties.
Synthesizes the two factors of extraction rate and molecular, NaClO-CHCl3 method was best choice.
And then the properties of the transition peak are initially determined.
So the processing forming could not be affected.
The processing forming could not be affected by different extraction methods.
Online since: April 2014
Authors: Chii Ruey Lin, Da Hua Wei, Minh Khoa Bendao
The results showed that the micro structure, surface roughness, electrical properties, and optical properties were affected by the nitrogen doping.
The short-circuit current was 3 mA and the fill factor was 0.38.
Nanocrystalline diamond (NCD) has been investigated recently [6-9] due to its unique combination of outstanding mechanical, electrical, optical, and chemical inertness properties, leading to developments of this metarials for operation at high temperature and in harsh environment which aimed at replacing Si and other metal elements.
However, it should be noticed here that a p-n junction and the doping level of diamond films are considered as the key factors for highly performance of these devices and should be controlled.
Electrical properties of NCD:N films on p-type Si substrate were measured using Van-der-Pauw method in the room temperature.
Online since: December 2009
Authors: Chao Yang Sun, Qing Dong Zhang
So the mechanics property of superalloy is concerned with the temperature of workpiece, and the temperature rise is one of the key factors which affect the performance of superalloy tube, moreover, it can lead to variety of mechanical properties.
During hot process, the temperature has a significant influence on structural state and mechanical properties of billet.
Other mechanical properties are temperature dependent.
Based on the above FEM model, this study is to determine the relation between technological factors and the temperature rise, extrusion force.
Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 2000, 293(1): 198-207 [10] Na Young-Sang, Yeom Jong-Taek, Park Nho-Kwang, et al.
Online since: July 2020
Authors: Ardiyansyah Yatim, Gatot Prayogo, Ahmad Karayan, Hendra Novi, Wildan Hamdani, Sahrudin Tambunan, Rahmat Burhanuddin
Therefore, the mechanical properties including the maximum allowable stress for this vessel is questionable after PWHT at 675 °C.
Bottom head section of the vessel Material Properties.
To overcome this issue, the PWHT is usually performed to regain or increase the mechanical properties of the welded part.
Some non-destructive tests such as insitu metallography, radiography, and hardness testing are usually carried out to assess the mechanical properties of the welded part.
FE analysis can be alternative way of assessing not only the global mechanical properties but also the integrity of the facilities after weld repair and PWHT.
Online since: September 2013
Authors: Dao Fang Wang, Nan Tong Zhang, Xue Qing Wang, Yan Chen
Based on the study of concrete pile composite foundation, the effect of concrete pile composite foundation on reinforcement and influence factors of settlement are analyzed in the paper.
The effect of reinforcement of concrete pile composite foundation is analyzed and the different influence factors of concrete pile composite foundation settlement are numerical simulated, mainly the pile modulus and embankment modulus, in the paper.
The main soil of both sides is that, the surface layer is soil with good physical and mechanical properties in the first 1.3m, and flow plastic silt or silty clay is in the next 18m while plastic and flow plastic of silty clay or loam is in the next 50m.
The results of numerical simulation of concrete pile composite foundation Numerical simulation on the factors of composite foundation settlement To research on the effects of the pile modulus on the composite foundation settlement, the calculation is that the pile length is 15m, the pile diameter is 0.4m, embankment height is 2m, the width of the top surface of the embankment is 44m, the width of the bottom surface of the embankment is 48m.
The compression of reinforced area is less affected by the deformation modulus of embankment soil.
Showing 9341 to 9350 of 26166 items