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Online since: October 2014
Authors: Ling Liu, Li Yong Tang, Bing Bing Shen, Chang Zhou, Qian Tin Chen
The micro-nano sized tungstate materials characterized with fabulous superior properties in fields of luminescence [3-5], magnetism [6] and thermo-optical properties [7] and so on are the hot points of researches these years.
Factors controlling morphology The morphology a crystal grows depends on the cystal internal structure as well as the growing environment [21].
Other factors: The impurities in solution, which can affect solubility and solution property, change crystal habit to develop morphology.
Meanwhile the morphology is developing to be refered to an influence factor of tungstate properties [22].
The crystal anisotropy qualifies an excellent properties ranging of mechanical capacity, optical character, elasticity and magnetic performance in certain specific lattice direction, greatly satisfying some devices the demands of fine material properties.
Online since: October 2014
Authors: Guo Jian Cao, Wan Jiao Xu, Yi Cheng Feng, Wan Yong Tang
In addition, a nanoindentation was employed to characterize the mechanical properties at different radius.
On the other side, the dense inner prevents the decline of strength and provide better mechanical properties.
And the pore structure, as well as mechanical properties, of the material was also characterized.
Owing to the surface roughness made by inevitable external factors, the inner edge is partly empty.
The microstructure and the mechanical properties of the GPT were characterized.
Online since: February 2019
Authors: Denis B. Solovev, Evgenij Korolev, Ruslan A. Ibragimov, T.R. Deberdeev, V.V. Leksin
This is due to the mechanical and thermal effects of ferromagnetic bodies altering the structural parameters of Portland-cement particles and the related physico-chemical properties.
The degree to which such properties alter naturally depends on the impact frequency and the duration of treatment.
The intensity of the structuring process for such composites naturally depends on the physico-chemical properties of the material (treatment that improves such properties can also be referred to as activation).
[5] Kriskovaa L., Pontikesa Y., Zhanga F., Özlem Cizerb, Tom Jonesa P., Van Balenc K., Blanpaina B., Influence of mechanical and chemical activation on the hydraulic properties of gamma dicalcium silicate.
[et al.], Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of Portland slag cement.
Online since: January 2013
Authors: Gang Li, Hiroshi Okada, Feng Gao
The mechanical factors affect the restenosis after stenting and image-based simulation has become a popular tool for acquiring information.
Several risk factors such as smoking, hypertension, diabetes mellitus and high cholesterol have been identified which contribute to the progression of coronary artery disease [1].
The neotimimal hyperplasia is affected by mechanical factors, such as wall strain distribution and blood flow induced wall shear stress [5] and local arterial wall stress [6].
These studies aim at predicting and calculating the wall stress state generated after a coronary intervention and investigate the role of mechanical factors on the occurrence of restenosis after stenting.
Simplified approaches have improved the understanding of the structural properties of coronary stents.
Online since: June 2013
Authors: Zhang Jing
The Study on Disturbing Force of Dynamic Mechanical Systems using Kalman Filter Techniques Zhang Jing Suzhou Vocational University Keywords: Disturbing Force; Dynamic Mechanical Systems; Kalman Filter Techniques Abstract.
According to the approach presented in this paper, the disturbing force of dynamic mechanical systems can be estimated using Kalman Filter techniques.
Table 2 AUGMENTED TEST SYSTEMS Discussion of some properties of the estimation The performance of the input estimation is dependent on several influence factors, which shall be closer looked at. 1) Parametrization of the covariance matrix A major influence on the estimation result arises from the parameterization of the covariance matrix.
While the ideal system covariance tuning factor depends on the actual model quality, especially the effect of the input covariance factor is important to adapt the estimation result to the ndividual requirements.
In comparison, a 10% error in the damping of the eigenmode hardly affects the estimation.
Online since: August 2013
Authors: Hai Xia Huang, Hao Sun, Yi Hua Feng, Fu Meng Li
In this paper, we will examine self-lubricating ceramic tools and friction properties of coating tools, to find its friction performance factors and the formation mechanism.
expansion dry cutting and high speed cutting Main factors affect the friction properties of self-lubricating ceramic tool material The manufacture of ceramic composite tool, the first choice to meet our requirements matrix, mechanical and friction properties of different matrix may be similar or different completely.
There were two factors affect the cutting performance of the self-lubricating tools.
The solid lubricant added will impact tool’s mechanical performance and properties, we need to find a relatively perfect point between them.
[15] Maoquan Xue, Properties of Ni-based self-lubricating composite, Int.
Online since: September 2014
Authors: Hong Yu Zhou, Yi Bo Chen, Ya Ran Zhang, Hai Qian Wang
For basic mechanical properties of concrete materials, such as compressive, tensile, flexural and shear properties, present researches on mechanical properties of static loading are quite a lot, also relatively mature.
When concrete is subjected to dynamic loads, its mechanical properties increase.
Lots of experiments about strain-rate effect on concrete mechanical properties are made by domestic and foreign scholars, and some conclusions are obtained.
Dynamic Uniaxial Compressive Properties of Concrete Concrete is a kind of quasi-brittle materials, and under dynamic loads, mechanical properties exhibited are quite different from those in quasi-static loading conditions.
Therefore, research on dynamic mechanical properties of concrete is not only confined to the uniaxial stress state.
Online since: August 2013
Authors: Zheng Lin Liu, Sheng Dong Zhang, Bo Qin, Liang Zhao, Peng Liu
Therefore, research on the heat - structural properties of marine stern shaft mechanical seal has important theoretical significance and practical value[2].
The stern shaft mechanical seal materials and boundary conditions setting The stern shaft mechanical seal materials.Floating ring (static ring and the bracket) using M106H graphite impregnated with epoxy resin embedding CESTIDUR (polyethylene, polyamide, poly synthetic materials formaldehyde resin), namely the friction face is CESTIDUR material; static ring bracket adopts M106H graphite; ring adopts 3Cr13 stainless steel.The structure parameters and property parameters of bracket and static, moving ring as listed in Table 1.
Before and after the experiment system operation of the physical properties do not change with temperature.
Calculation of friction heat.In the actual operation process of mechanical sealing device, the friction heat generated at the same time in the two seal.Due to the frictional heat generation and distribution is affected by many complicated factors, the size of the friction heat are difficult to determine, heat load calculation only according to the total frictional heat.Due to the introduction of contact theory, the model of computation can be obtained in the radial position of the contact surface of the sealing pressure, which can lay a good foundation for the calculation of heat flux load, so this paper uses the following simplified formula for calculating the friction power loss[4]
Calculation of Mechanical Engineering Society of Heilongjiang province. 2002 journal, design of mechanical seal of Heilongjiang: Heilongjiang Institute of mechanical engineering, 2002:242-246
Online since: December 2016
Authors: Martin Vyšvařil, Patrik Bayer, Tomáš Žižlavský
The applied limestone aggregate is convenient to lime-based mortars and the addition of limestone fines contributes to better mechanical properties of lime mortars.
Alvarez, Masonry repair lime based mortars: factors affecting the mechanical behaviour, Cem.
Pozo-Antonio, Evolution of mechanical properties and drying shrinkage in lime-based and lime cement-based mortars with pure limestone aggregate, Constr.
Alvarez, Mechanical properties of naturally hydraulic lime based mortars, Cem.
Papayiannai, The role of aggregate on the structure and properties of lime mortars, Cem.
Online since: September 2014
Authors: Yong Lin Kang, Guo Ming Zhu, Ming Fan Qi, Huan Huan Zhang, Bing Zhou
The defects not only affect mechanical properties, but also deny the opportunity for property enhancement by heat treatment.
Tensile properties and fracture morphology of RDC AZ91D Mg alloy.
The mechanical properties of RDC castings can be improved through heat treatment and no bubbles appear on the surface.
The tensile properties for AZ91D Mg alloy in different conditions are shown in Tab 1.
Microstructure and mechanical properties of rheo-diecasting AZ91D Mg alloy, Trans.
Showing 4301 to 4310 of 26166 items