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Online since: July 2015
Authors: Toshihiko Kuwabara, Satoshi Shirakami, Shigeru Yonemura, Tohru Yoshida, Noriyuki Suzuki
In sheet metal forming, the yielding and work hardening behavior of sheet metals are one of the most influential factors that affect the formability, stiffness, and crushability of the formed parts.
The mechanical properties obtained from uniaxial tensile tests in the RD of the materials are listed in Table 1.
Table 1 Mechanical properties of the test materials Material Thickness [mm] YS [MPa] TS [MPa] EL [%] IF steel 1.6 150 286 54 980 DP steel 1.6 730 1051 14 Experimental apparatus.
The SD effect is not affected by the strain path change.
Tanabe, The Bauschingar effect and its role in mechanical anisotropy, J.
Online since: September 2011
Authors: Long Chen, Ming Qiu, Zhi Lun Gao, Guo Feng Wang
The results indicate that the fiber woven with PTFE effects the friction and wear characteristics of bearing, the tribological properties of bearing with Kevlar/PTFE fiber woven liner is the best in the three kinds of bearing.
It can be widely used in aerospace, aviation, agriculture, textiles, transportation and many other fields of mechanical equipment.
Thus, the tribological properties of lubricating spherical plain bearing are the key factors affecting its life and performance.
Table1 The material properties of different spherical plain bearings Numbering Material of inner ring Material of outer ring Material of bearing liner I GCr15 GCr15 Nomex/PTFE fiber II GCr15 GCr15 Kevlar/PTFE fiber III GCr15 GCr15 glass/PTFE fiber Test apparatus.
The type of fiber mixed with PTFE fiber effects the friction and wear characteristics of bearing, the bearing liner mixed with Kevler/PTFE showing the best tribological properties in the three kinds of bearing liners.
Online since: December 2012
Authors: Bing Xiang Liu, Meng Shan Li, Yan Wu
There are many factors influence the distribution of the melt temperature, these factors have the coupling and nonlinear relationship which is difficult to measure accurately by the traditional measuring method.
Introduction Melt temperature is one of important parameters in polymer extrusion, which produces an effect on melt rheological properties and stability.
It is important influences on the properties of the finished products, and the temperature change will cause the melt viscosity changed too.
Thereby, all of the factors will cause the variation of the pressure and flow rate.
Selected 4 factors which affected mostly the polymer melt temperature field as the input variables, they were screw speed, die wall temperature, the wall temperature of the transition section and the measurement section, so the node number in the input layer of the neural networks was 4.
Online since: October 2023
Authors: Jorge Salguero Gómez, Severo Raúl Fernández-Vidal, Francisco Javier Puerta-Morales, Luis Roldán-Jiménez, Alejandro Sambruno
The quantification of this defect is difficult, and there are different factors for its determination, such as the conventional delamination factor "FD" the equivalent delamination factor "Fed" and the alternative delamination factor "FA" [10,11].
In summary, the research exposes the relationship that exists between quality, delamination, force, and wear, but few studies correlate these factors.
Results of CFRP material properties Interlaminar shear Tensile strength Elastic Module Glass transition temperature 77 MPa 1072 Mpa 62 GPa 167.54 °C Table 3.
a) b) Figure 2. a) Mahr Perthometer PGK 120 roughness tester with detail of MFW-250 contact stylus b) Three point internal micrometer The delamination factor is a parameter of special importance, as it directly affects the functional performance and mechanical properties of the material components.
The dimensional quality is another relevant factors, where tolerances between 30 and 90 µm are established.
Online since: January 2013
Authors: Juan Ye, Zhan Feng Zhao
LED performance was significantly improved because of the improvement of encapsulation design and materials properties.
All these factors are relatively independent; however, they are also coherently correlated with each.
The silicone materials has a better properties compared with general epoxies, featured in below aspects: (a) bigger transparency degree, up to 99%, (b) greater refraction index, around 1.4~1.5, (c) better thermal stability, bear 200℃ elevated temperature, (d) lower elasticity modulus and lower moisture absorption.
On the other hand, the forward voltage is affected by temperature.
The lab experiment and field quality assurance proved that both the encapsulation materials and the encapsulation interfacial properties greatly affected the lighting efficiency and the device reliability.
Online since: June 2013
Authors: M. Amuei, R. Khorshidi, Masoud Emamy
Forming in semi-solid state to achieve globular microstructure has an effective influence on mechanical properties of aluminum alloys.
The use of SSF methods minimizes the amount of porosity in produced specimens and has shown good mechanical properties [2].
In this technique, the microstructure of first specimen directly affects the final mechanical properties [3].
The SIMA process affects the microstructure and alters the dendritic structure to globular.
This kind of distribution of intermetallics causes achieving better mechanical properties specially higher resistance against growth of cracks.
Online since: April 2008
Authors: Hong Ye, Zhong Lin Yan, Yi Luo, Bin Shen
A favorable joint had been obtained by EBW for AZ61 magnesium alloy, in which heat affected zone was not evident, the fusion zone (FZ) consisted of fine-equiaxed grain.
This non-linear transient thermal analysis requires a series of parameters for the thermo-physical properties of materials, such as heat conductivity λ (W·m -1·°C-1), convective heat transfer coefficient β(W·m-2·°C-1), density ρ( kg·m-3), specific heat capacity C (J·kg -1·°C-1), melting point (°C) and initial temperature of welding parts (°C).
The distribution of its heat flow density is illustrated as follows: )] (3exp[ 36 ),,( 2 2 2 2 2 2 2 2/3 2 2 c y b z a x abc Qf zyxq ++−× = π (2) Where a, b, c1 and c2 is heat source shape parameters that can be different and is independent from each other; Q is heat input power, f1 and f2 are energy distribution factors for the first and second ellipsoid heat sources, f1+f2=2.
Point 2 is in the heat affected zone (HAZ) at a temperature of 510°C approximately.
Chinese journal of mechanical engineering, Vol. 40 (2004), p.165
Online since: December 2013
Authors: Roslee Ahmad, Zawati Harun, Hasan Sulaiman, M.B.A. Asmael, R. Sadeghi, H. Mohamad
There has been a growing demand to meet the severe requirements of the design engineers for fabricating thinner section castings with excellent mechanical properties [1].
Hence, one of the prime factors to be taken into account in foundry practices of thin section castings is the fluidity and a thorough knowledge about the various factors influencing it is also essential [4].
The factors determining fluidity can be basically divided into (i) metallurgical variables, such as composition, superheat, latent heat, surface tension, viscosity and mode of solidification and (ii) mold/casting variables, such as part configuration, cooling rate, degree of super heat, mold material and its surface characteristics [5].
Cr has been reported as a destructive impurity for mechanical properties of Al-Si alloys [8].
The fluidity of the melt is affected by both the morphology and volume percentage of intermetallics.
Online since: August 2014
Authors: Marin Bane, Florin Miculescu, Mihai Branzei, Marian Miculescu, Lucian Toma Ciocan, Daniela Meghea
The implant surface morphology and microstructure significantly affect cells and tissue quantity formed at the interface.
Surface properties of biomaterials are commonly grouped into three categories: geometric, electrical and chemical properties.
Implant geometry is one of the most important factors to be taken into account during the implant or prosthesis design.
Mullere, Relationship between surface properties (roughness, wettability and morphology) of titanium and dental implant removal torque, J Mech.
Voicu, Correlation aspects between morphology, infrared and acoustic absorptions properties of various material, Optoelectron Adv Mat 6 (5-6) (2012) 631-638
Online since: January 2016
Authors: Mohd Noor Asril Saadun, Ahmad Anas Yusof, Mohd Syukran Ismail
Most hydraulic components used mineral oil as the pressure component cannot be used for water hydraulic application because the properties of water significantly different with mineral oil.
The density of water is higher than mineral oil and the result of those properties will be increases pressure losses and dynamics effect on control valve.
Most of system analysis based on the properties of water that will be effect in water hydraulic.
The designations were depended on the tank volume, position and pump suction pressure to reduce the effect of water properties limitation.
There are some of water properties changed affect by temperature, which is viscosity, density, and cavitation.
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