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Online since: March 2010
Authors: Shu Huang, Yu Jie Fan, Jian Zhong Zhou, Min Wang, Yin Bo Zhu, Ling Ling Hu, Jian Fei Zhao
In this paper, the basic principle of µLSP and mechanism of wave-solid coupling were introduced, the influence factors on strengthening effects, such as micro-size effect, anisotropy, dislocation, stacking fault, grain boundary and surface energy were discussed from the microscopic point of view, the results provide theoretical guidance for further study.
Distribution of dislocations in metal surface will have a direct influence on the mechanical, physical metallurgy and electrochemical properties of the material [15].
Stacking fault energy is a physical nature of metal materials, the value of stacking fault energy is closely related to motion mode of dislocation during the deformation of materials, and directly affects the mechanical properties of materials.
Summary LSPµ is an effective surface treatment method for improvement of physical and mechanical properties of micro-device structure.
Murr.: "Microstructure-Mechanical Property Relations," Shockwave and High-Strain-Rate Phenomena in Metals (Plenum Press, America 1981)
Online since: February 2014
Authors: Rui Yin, Rui Wang, Xiang Yang Peng, Ke Wang, Xiang Yang Zhou
They can also affect the stability of the visual axis of camera.
The motion of pitch frame is affected by coupling moment and.
The motion of roll frame is affected by coupling moment and.
The paper proposes a novel method for the characteristic, which is introducing a judgment factor abs()<10-7.
Fig.2 The control block diagram of azimuth frame In Fig.2, if the judgment factor abs()<10-7.
Online since: September 2018
Authors: Ali Haider, Omar Farooq Azam, Muhammad Talha, Saleem Akhtar
Minor addition is made to have requisite properties suitable for dental prostheses.
In this work investigation was carried out to find out optimum chemistry to have melting temperature of the alloy in the range of 1100-1200 °C without compromising the requisite mechanical and corrosion properties.
Beryllium metal is added to Ni-Cr alloys to improve properties like hardness and reduce fusion temperature [6].
Ni-Cr based dental alloy contain minor additions of other elements for improvement in properties.
Reis, Characterization of two Ni–Cr dental alloys and the influence of casting mode on mechanical properties, J.
Online since: June 2012
Authors: Wei Lai Chen, Mao Yi Zhang, Zhan Chang Tang, Miao Miao He
Textile should have certain mechanical strength, and therefore tensile property is one of the most basic testing items in textile production[3].
The tensile properties of textile materials include strength and elongation.
It shows that the mechanical properties of floret silk/cotton sports socks are quite well.
Breathability affected wear feeling comfort properties directly such as breathe freely, function of cool, heat keeping and insulation.
Air permeability of the fabric depends on the pore size and pore number in fabric, thus thickness and density of the fabric are the very direct effect factors to breathability.
Online since: May 2011
Authors: Lei Wang, Dong Xiao Li, Ping Zhang
In order to test the quality of the overall structure of the bridge, understand the dynamic characteristics of the bridge structure, and evaluate the mechanical properties and work behaviors of the structure, load tests on the bridge were conducted.
Determination of Test Load To ensure the test results, we take the efficiency of static load test, denoted as ηq, as controlling factors when choosing the load and position of the test, according to the provisions and requirements in "Test Method for Large-span Concrete Bridges”.
As Table 2 shown, the load efficiencies under various working conditions which are maximum bending moment positive at vault, maximum bending moment negative and maximum horizontal thrust at springing, and maximum bending moment positive and maximum bending moment negative at L/4 all meet the requirement which ranges from 0.85 to 1.05, therefore, this load test can reflect the mechanical properties of the structure under the standard vehicle loads on the section of the vault, L/4 and the springing.
It indicates that bridge keeps in good elastic behavior, good mechanical characteristics and elastic resilience state under every case.
Conclusion Determining the declination extent and function of the bridge structure not only helps us to have a total grasp of the existing bridge to ensure traffic bearing capacity safety, but also provides the data which is helpful to a similar bridge under construction to decrease the probability of generating negative factors, also improve the durability of the bridge to extend the useful period of the bridge.
Online since: January 2013
Authors: Chang Ping Chen, Fu Qiang He, Li Hong, Xian Qi Zhou
Many factors influencing water loss will affect concrete workability.
Experimental programs Raw materials.One type of P.O 42.5 cement was used for experiments, whose properties accord with Common Portland cement (GB175-2007) [3].
Properties of water used for mixing RA concrete accord with standard of water for concrete (JGJ63-2006) [5].
Concrete: Microstructure, Properties, and Materials[M], McGraw-Hill Company, 2005
[7] Shaocheng Ji, A generalized mixture rule for estimating the viscosity of solid-liquid suspensions and mechanical properties of polyphase rocks and composite materials[J].
Online since: June 2017
Authors: Mohammad Sukri Mustapa, Mahmod Abd Hakim Mohamad, Muhammad Irfan Ab Kadir, Mohd Arif Samsi, Ahmed Sahib Mahdi, Abdul Latif Mohd Tobi
AMCs when compared to the base of aluminum alloy, they showed good combinations of mechanical and tribological properties, additionally these properties can be adapted to an explicit requirement [2].
The factors that affect wear have been grouped under the following headings.
There is a growing interest worldwide in manufacturing hybrid metal matrix composites [HMMCs] which possesses combined properties of its reinforcements and exhibit improved physical, mechanical and tribological properties [4].
Therefore, some of mechanical properties and wear rate have been studied in this paper.
“studies on mechanical properties and tribological behaviour of lm25/sic/al2o3 composites” Journal of Engineering Science and Technology Vol. 10, No. 2 (2015) 134 – 144
Online since: August 2011
Authors: Sankara J. Subramanian, Vijay K. R. Penmetcha
., 23, Airport Road II Floor, Leela Galleria, Bengaluru 560008 India ashankar_sj@iitm.ac.in, bvijay.vilto@gmail.com Keywords: Lap-Shear, Mechanical Properties, Digital Image Correlation (DIC), Sn-Cu Solder, Pb-Free Solder, Electronic Packaging Abstract.
The lap-shear test is frequently used in the microelectronics industry to obtain mechanical properties of solder joints.
Introduction Solders are widely used in the micro-electronics industry [3] to provide interconnections between materials that have very different mechanical properties [4] such as elastic modulus and coefficient of thermal expansion (CTE).
While their low melting points are an advantage with respect to processing and their low yield stresses and large ductility protect the adherends from thermo-mechanically induced failure, these factors contribute to substantial strains in the solder joints themselves.
Creep properties of composite solders reinforced with nano- and micro-sized particles.
Online since: September 2011
Authors: Hao Jie Lv, Guo Qing Hu, Xing Ye Wang
In fact, temperature dependence of the sensor will be related to thermal and mechanical properties of sensor materials, including Young’s modulus, Poisson’s ratio, Coefficients of Thermal Expansion (CTE), Thermal Conduction (TC).
In addition, the thermal properties of the film, which are different from the bulk, will also contribute to performances of the sensor.
However, temperature distribution will produce thermo-elasticity to affect the deflection w.
Temperature Dependence of Material Parameters For thermal conductivity K, temperature becomes a most important effect factor in heat transfer process.
Ma: Practical handbook of thermophysical properties (Chinese Agricultural Machinery Press., China 1969).
Online since: July 2013
Authors: Jin Woo Lee, Jun Mu Park, Yun Hae Kim
Mostly, Resin Filling stage is greatly affected by the level of permeability, a characteristic of stiffener due to pneumatic resistant nature in the process.
Other factors such as viscosity, technological vacuuming, or even stiffening process itself could also influence the production as well.
In this research, the researchers examined the mechanical property and the pneumatic nature of Resin by dividing the pneumatic movement of the Resin into sections.
Introduction Fiber reinforced composite materials have relatively better properties including light weight, high strength, high stiffness, and corrosion resistance than that of conventional metallic materials.
Table. 2 Physical properties of the basalt fiber used for experiments Tensile Strength (MPa) Modulus of Elasticity (GPa) Density (g/㎥) Diameter (㎛) Temperature (℃) 3000~3500 85~95 380 8~15 -260~900 Hexion’s rim135 Infusion/rimh137 system as the epoxy resin.
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