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Online since: January 2012
Authors: Sheng Hua Lv, Ming Ming Hou, Shui Li Lai
The effect of the main factors on yield of the copolymer was discussed.
Samples were prepared in deuterated dimethyl sulphoxide (DMSO-d6). 3) Test for Ts and Mechanical properties of leather: Ts of leather were measured by Digital Leather Shrinkage Temperature Tester MSW-YD4 before and after tanning.
The improvement of the mechanical properties which listed in Table II is coincident with the increase of Ts and thickness listed in Table I.
The results show that these factors can affect its copolymerization distinctly.
The applied results prove that the copolymer has excellent tanning and retanning properties.
Online since: December 2012
Authors: Peng Yi, Xi Hong Zou, Jian Ke, Bin Deng, Xiao Hui Shi, Wen Li Li
The influence of electromagnetic coupling and mechanical coupling on control property in dynamic emulation system is analyzed. the coupled system is a dual-input dual-output system.The load torque changes will cause the variation of speed in the system and the speed changes also affect the variation of load torque.
From the equation(1) it can be concluded that cross-coupled voltage has an effect on speed and other factors.
(6) The transfer function G(s) is presented by: (7) Two separate equivalent control system can be given by the unit matrix method, and the transfer function of the control object is one.The unit matrix method for the asynchronous motor decoupling control schematic diagram is shown in Fig.2 Analysis of coupling characteristics of the mechanical system.The speed regulation and load variation greatly impact on the dynamic loading system. mechanical inertia and friction damping are also the influence factors, therefore mechanical coupling must be considered in the whole system.
The equation(8) and (9) show that the load torque changes will cause the variation of speed in the system, and the speed changes also affect the variation of load torque.
Mechanical Electrical Engineering Technology (In Chinese). 2011,40(1):69-71
Online since: December 2019
Authors: Victoria A. Gurieva, A.V. Doroshin
The separate and joint grinding raw materials mixture rational composition influence on the ceramics technological properties is studied.
The technogenic waste addition to low-quality clay raw materials allows not only to improve the physical and mechanical properties of the finished product, but also to regulate the production properties of wall ceramic products in accordance with regulatory requirements, to reduce the production costs and to solve the waste disposal problem.
However, the insufficient raw materials grain composition optimal distribution method knowledge, affecting the basic physical and mechanical characteristics of ceramics, determines the need to develop a new experimental method of mathematical composition of the ceramic compositions of the «loam + ASW» ceramic masses.
The following factors were taken as variation factors: X1 - waste ash, mass%, X2 - silicate lump, mass%, X3 - technological parameter: particle size distribution, pressing pressure or molding moisture of press powder.
The influence of variable factors X1 - ASW, %; X2 - silicate lump, %; X3 - pressing pressure, MPa on the physical and mechanical properties of the experimental compositions bricks a) average density,[g/cm3]; b) water absorption, [%]; c) compressive strength, [MPa] Analysis of nomograms to determine the optimal pressing pressure (Fig. 1) after separate grinding showed that it was possible to obtain the ceramic brick brands from M120 to M225 with satisfying physical and mechanical properties, where the average density is in the range from 1,6 to 1,98 g / cm3 and with water absorption 12-14 %.
Online since: December 2010
Authors: Torsten Sjögren, Henrik Svensson
The present paper focuses on the pearlite appearance, since it strongly affects the mechanical properties.
The pearlite interlamellar spacing (ILS) will highly affect the mechanical properties of the grey cast iron.
Results from tensile test and mechanical properties of the investigated materials are elsewhere presented and discussed more detailed [9].
Other factors as e.g. pouring temperature and inoculation will also affect the final graphite structure.
Nilsson: Effect of alloys on mechanical properties in grey iron, Swedish Foundry Association (1982)
Online since: January 2019
Authors: Annalisa Pola
CORRELATION BETWEEN MICROSTRUCTURE AND PROPERTIES OF SEMI-SOLID PRODUCTS Annalisa Pola University of Brescia, Department of Mechanical and Industrial Engineering Brescia, Italy email: annalisa.pola@unibs.it Keywords: semi-solid; microstructure; globules; mechanical properties; wear; corrosion; cavitation-erosion.
On the contrary, only some studies focus their attention on the relationship between enhanced mechanical properties and the microstructure.
This modified microstructure strongly affects the mechanical and technological properties of the casting, additionally improved by the absence of porosity typical of SSM products.
Wu, Microstructure and mechanical properties of rheo-diecasted A390 alloy, Trans.
Mao, Effect of semi-solid processing on microstructure and mechanical properties of 5052 aluminum alloy, Trans.
Online since: September 2013
Authors: Jia Liang Guan, Li Li Zhu, Zhi Wei Wang, Xin Qiang Ma, Xiao Hui Zhang
The experiments show that: grinding depth, electrolysis gap and wheel peripheral velocity are the main factors to affect the surface quality.
GCr15 bearing steel chemical composition, mechanical properties, ELID grinding experiment equipment and grinding conditions are respectively as shown in Tables 1 and 2.
Table 1 Chemical composition and mechanical properties of GCr15 bearing steel Material Chemical composition /% Mechanical Properties GCr15 steel C Si Mn Cr Mo σb/MPa HRC 0.95~1.05 0.15~0.35 0.25~0.45 1.04~1.65 ≤0.10 598~715 62~64 Ni Cu P S ≤0.3 ≤0.25 ≤0.025 ≤0.025   Table 2 Experiment equipment Machine tool MSG-612CNC-FA surface grinder (modification) Measuring instrument Harbin Measuring Tools Group 2205 surface roughness measuring instrument Image acquisition microscope +Panasonic WV-CP460 Wheel Copper-iron bond diamond pellets(W10) Electrolysis power Electrolysis Lapping liquid Lapping liquid High frequency DC pulse power 4 Experimental results and analysis 4.1 Experimental effects Through the analysis of the physical and chemical properties of GCr15 bearing steel and machining performance, also combined with similar material grinding experience, ELID grinding technology was finally adopted for the bearing steel.
(3) The electrolysis gap, grinding depth and wheel peripheral velocity are the main factors to affect the surface quality.
Journal of Mechanical Engineering,2000, 36( 5) :89-92 [4] GuanJiaLiang,FanJinWei,MaChunMin: ELID grinding technology in precision and ultra-precision processing and application for hard and brittle materials, Journal of Beijing university, 2001, 12
Online since: October 2012
Authors: Tao Liu, Tu Zhang Ming, Guang Wei Hu
The main pavement perforamnce, such as mechanical properties, shrinkage properties and fatigue properties of cement cold-recycled mixture may not meet the requirement of high grade highways.
PAVEMENT PERFORMANCE Mechanical properties B.BABIC’S research shows that the relationships of different mechanical properties of cement stabilized materials is affected by individual composition factors, such as cement content, cement type, gradation and density, the influence of the cement type or gradation has been found to be lower than that of density.
Shrinkage properties (1) Influence factors K.P George and H.E.
Chinese research institutes have been done much about the influence of different influence factors on shrinkage properties of cement stabilized materials.
At the base of tha lastest research on cement stabilized materials, we can conclude the various factors influencing shrinkage properties of cement stabilized cold-recycled mixture: a.
Online since: October 2010
Authors: Liang Yun Lan, Chun Lin Qiu, De Wen Zhao
Under the condition of welding thermal cycles these microstructures always happen to complex phase transformation and result in mechanism properties sharply varied at different parts of heat affected zone (HAZ).
This information will help to further understand the failure mechanism of the welded joints and properties variation in HAZ.
The main mechanical properties of as-rolled steel are as follows: yield strength 645MPa, tensile strength 760MPa, and impact absorbed energy (-20℃) 161J.
Schematic diagram of Charpy V notch position In order to facilitate analysis of the HAZ microstructure and mechanical properties, A V-type joint design was considered and four-passes welding procedure was conducted to generate a relatively large HAZ section.
The Eq. (1) can be expressed as a following form: , (1) Where the coefficient K is a constant, A contains metallurgical factors.
Online since: June 2018
Authors: Barbara Grzegorczyk
The internal (structural) factors, affecting the PLC effect, are: chemical constitution and phase composition of the material, crystalline structure (mono- or polycrystalline), grain size and state of precipitations (shape and morphology).
The external (mechanical) factors are: temperature and strain rate, deformation environment as well as state and development of the material.
The results of investigations on the mechanical properties after a tensile test have been shown in Table 2.
Results of the mechanical properties of copper alloys CCNB, CB4, CNCS, CNP and CW106C after tensile test at elevated temperature No.
Ozgowicz: Influence of plastic deformation temperature on the structure and mechanical properties of low-alloy copper alloys with Co, Ni and B.
Online since: December 2010
Authors: Yi Xia Yan, Fang Ju Zhang, Ruo Ze Xie, Xi Cheng Huang, Wen Jun Hu, Jun Mei, Yong Mei Chen
In this work we focus on the static and dynamic properties of vanadium alloy V-5Cr-5Ti over a range of temperature from RT to 1000 degree at strain rates ranged from 10-4/s~103/s.
The mechanical properties of vanadium alloy V-5Cr-5Ti depend significantly on strain rate, for instance, the yield stress, ultimate tensile strength (UTS).
The environmental temperatures affect the brittle-ductile transition.
The environmental temperatures affect the brittle-ductile transition.
Mechanical Metallurgy.
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