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Online since: February 2013
Authors: Xin Jian Zhang, Jun Fang Xue, Ying Li Zhang
Information entropy is decided by internal properties of things.
Comprehensive evaluation for disassembly sequences process There are many factors affecting product disassembly sequences, both qualitative and quantitative.
Data of comprehensive evaluation includes project set, factor set and weight set.
It can work out the total property values .and different disassembly sequences are sorted depending on the size of the total property values.
Mechanical Design, 2005, 22(1) , In Chinese [3] Kroll E, Thomas A H.
Online since: December 2010
Authors: Yang Li, Hai Yong Qin
The effect of the sample treated with LSP is affected by many factors, such as the fluctuation of the laser power density, the condition of the overlay and the aborbent coating [8-11].For example, when the power density of a laser pulse from a Q-switched laser is insufficient or the laser misfire, the residual compressive stress caused by the laser shock wave will be deficient.
Its chemical composition and the mechanical properties are shown in Table 1.
In general, while people have the comparative sufficiently cognition among the intrinsic properties of research object and the relationship among various factors, mathematical model-y =φ( x) is build to describe by mechanism analysis method, and then parameters in model are defined using the method of curve fitting .
,Laser shock processing and its effects on microstructure and properties of metal alloys: a review, International Journal of Fatigue Vol. 24(2002) p.1021 [2] J.L.
Swain.The influence of coatings on subsurface mechanical properties of laser peened 2011-T3 aluminum.
Online since: October 2015
Authors: Luba Bicejova, Slavko Pavlenko, Ján Kmec
Factors of liquid basic physical properties and their hydrodynamic regularities. 2.
Factors of Basic Liquid Physical Properties and Their Hydrodynamic Regularities The identification of liquid basic physical properties is based on basic properties and equations of hydrodynamic processes which are aptly described in [1,2].
The basic physical properties and hydrodynamic regularities of the liquids used at hydrodynamic processes and which are significant for jet technology hydrodynamic processes are [6,7]: a) Physical properties: 1.
a) Physical properties 1.
Table 2 Graphic Model of Hydroerosion Factors Complex – Model KMF1 FACTORS INFLUENCING HYDROEROSION SURFACE TOPOGRAPHY Factors of basic liquid physical properties and their hydrodynamic regularities Technical factors influencing hydroerosive production process.
Online since: January 2013
Authors: Yan Hai Sun, Tao Shen, Lai Zhong Song
Random parametric equation to generate an arbitrary Circle inscribed polygon Basic extension factor and its properties.
So we see the definitions and properties of basic extension factor in reference [6].
By the vector operation properties: = , so we use A, B, and C to express DF, eventually we get =.
A circular arc scale affect Fig.2.
By finite element mesh analysis such as mechanical, thermodynamic etc, it prepares a prerequisite for the application of practical engineering.
Online since: September 2011
Authors: Prasad K.D.V. Yarlagadda, Andre Poh, Shu Hau Hsu
However, the dissipation factors for absorptive materials are finite.
Their results indicated that curing of epoxies using microwaves reduces curing time and could improve the mechanical properties.
Fillers are commonly added into the mixed solution of epoxy resins and hardeners to change or improve the physical, mechanical and processing properties.
Another important factor in the tensile properties of the material is it’s percentage elongation.
Material properties were not greatly affected with the exception of Resin R 2515 which turned out to be very brittle even after reaching it’s “C state”.
Online since: October 2017
Authors: Nonthaphong Phonphuak
The main factors involved in manufacturing clay bricks are the type of raw material used and the firing temperatures, both of which affect the final product [4].
The effects on the physical and mechanical properties of clay bricks were examined and assessed.
The physical properties of specimens after firing were characterized.
The high porosity of clay brick is beneficial in the terms of thermal properties of brick i.e. brick with high porosity also has low thermal conductivity and is good for the insulating properties.
Ersahin, Quantitative analysis of pumice effect on some physical and mechanical properties of clay bricks, J.
Online since: June 2013
Authors: Chun Yan Duan, Dong Liang Lu, Da Jun Zhang, Tao Lin
A lot of factors could influence the result of directional solidification.
Directional solidification technique enables the solidification structure of materials to put in order along a specific direction, namely as the directional or single crystal structure, which could improve scientifically mechanical and physical properties of materials.
We will investigate cooling water flow how to affect the impurity removing efficiency.
The impurity removal rate of Fe,Al and Ca Conclusions From the results,we could infer: (1) As was shown in Table 3, Cooling water flow was an important factor to the remove impurities , the impurity removal rate of Fe, Al, Ca were the most obvious, the impurity removal rate of Ca, Ti, Cr, Mn were the second best, the impurity removal rate of B,P were not obvious,especially to B.From Fig.1 we could found that the contents of B has significantly increased instead of decrease
Online since: May 2007
Authors: Shu Hua Li, Fu Chi Wang, Zhi Sun, Zhi Yong Chen, Cheng Wen Tan
Introduction Titanium alloy is of great importance in many industrial applications due to its highly attractive properties ,such as good deformability ,low density ,high specific strength, excellent corrosion resistance and high temperature strength retention[1、2].
Since the mechanical characterization of titanium is of great complexity and is strongly sensitive to the processing way and processing parameters, i.e. deformation grade, strain rate and temperature, it is important to clarify its deformation modes and the relationship between the processing variables, microstructure and properties under different deformation way and loading conditions .
Based on the Eq.(1), it is well known that tow counterbalancing factors strongly influence the growth of localized shear regions : imposed strain rate due to dynamic load and heat generation due to plastic work.
Hence, both the softening modus and the imposed strain rate affect developing of the adiabatic shear process.
Ho, Physical properties of titanium alloy, in the science, technology and application of titanium, in:R.I.Jaffee, N.E.
Online since: February 2015
Authors: Jan Křepela, Jakub Chmelař, Karel Petr, Vojtěch Dynybyl
A concept of closed electro-mechanical loop was chosen for design of the presented test stand due to its advantages described further.
The concept is based on the combination of electrical and mechanical power transfer in closed loop [1].
As it was described above, developed test stand is equipped with a unique system for the simulation of track irregularities [3] that dynamically loads the gearbox and considerably affects its fatigue properties.
It is expected that the testing stand should improve knowledge of behaviour and fatigue of gearbox as assembly, where minimum factors are neglected.
Dynybyl, Powertrain Metrology: Experimental Assistance of Research and Development in Mechanical Engineering, Czech Technical University in Prague, Prague, 2009.
Online since: April 2013
Authors: Wei Guang Li, Li Xin Chen, Peng Wei Hao, Chao Qiang Ye, Jia Le Song
Introduction Polysilazanes-derived ceramics for MEMS devices have excellent thermal and mechanical properties and good chemical resistance at high-temperature.
Moreover, the method of manufacturing such ceramics can be effectively employed to control the size and shape of MEMS devices, as well as material properties through tailoring the chemistry of the organic precursors.
These limitations are overcome by the addition of a thiol monomer to the system, thereby changing the predominant polymerization mechanism to step-growth thiol-ene polymerization mechanism, and exhibits several unique properties, including rapid curing in the presence of little or no photo initiator, delayed gelation, reduced sensitivity to oxygen inhibition, low volume shrinkage, high crosslink density and great mechanical property [2].
Besides the concentration of the photo initiator, the kinetics of the photo polymerization is also affected by the UV light intensity.
The activation energy and frequency factor are calculated as 13.97 kJ/mol and 54.0s-1.
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