Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: July 2007
Authors: Xiong Lu, Yang Leng, Zhan Feng Zhao
However, there were no systematic investigations on the key factors of the surface treatments to control such ability.
In this work, three factors are studied for their roles in controlling Ca-P precipitation in SBF: surface roughness, surface chemistry and surface energy.
Titanium and its alloys have been extensively used for orthopedic and dental applications for their excellent mechanical and biological properties.
It will be greatly useful if we can identify the factors which are crucial for enhancing the ability of Ca-P formation on titanium.
This work was the experimental study to identify the factors controlling Ca-P formation on titanium substrates.
Online since: May 2011
Authors: Yu Xin He, Yu Qing Zhang, Da Hu Yao, Hua Xu, Qian Ning
The measurements mechanical properties showed that the tensile strength of the polymer alloy was improved with styrene content.
The synergistic effect of PS and PDCPD also played a part in enhancing the mechanical properties of polymer alloy.
And the mechanical properties of IPNs may exceed the corresponding component polymers because the entanglement in IPNs cannot be separated permanently.
The report focused on the affect factors of the frontal polymerization, and did not study on the structure and mechanical properties of the polymer.
Mechanical Properties.
Online since: December 2010
Authors: Wen Bin Sun, Jian Lin Wang
These factors induce residual strain and reduce the in-situ capacity of FRP materials [20].
Types and thickness of FRP confining materials The selection of the type of FRP confining materials and the fiber thickness depends on several factors, such as the required enhancement in compressive strength, peak stress of unconfined concrete that subjected to FRP confinement, as well as the shape and dimension of concrete core.
Shape factors and cross-sectional geometries Circular columns confined with FRP wrap or tube and subjected to axial compression exhibit a uniformly distributed lateral pressure over the cross-section, therefore provide an efficient utilization of FRP materials.
It is also believed that, some other factors may influence the in-situ capacity of FRP materials due to the non-uniform confinement pressure attributed from non-circular sectional shape [38].
However, the small-scale specimens might conceal possible scale effects since the dilation properties of concrete could be influenced by specimen size [40].
Online since: February 2014
Authors: Yun Hua Guo, Wei Shen Zhu
Field investigation indicated that the degree of unloading in the rock masses on the left bank is related to the formation of fractures with medium dip angles. unloaded fracture zones (XL316-1 and XL9-15) with medium dip angles and faults f231, f208 revealed are the major factors affecting the overall stability of the right slope.
One of the representative methods is the Hoek-Brown empirical criterion (Hoek, 2002).The quantified rock mass classification system based on the geological strength index (GSI) with volumetric joint count Jv and the joint condition factor JC and the Hoek-Brown failure criterion are applied to evaluate the mechanical parameters of rock mass (Yang, Z., et al. 2010, Li, T.L. et al. 2004, Liu, D.Y., et al. 1998,).
The macroscopic properties are then derived from the mesoscopic behaviours by volume averaging (Tan, W.H., et al. 1999, Liao, Q.L., et al. 2005). (4) The fracture network simulation method (Hu, X.R., et al. 2005, Qiu, S.H., et al. 2005).
Table 5 The mohr envelop parameters obtained by numerical loading tests Rock mass classification NO. ① ② ③ ④ ⑤ ⑥ (Mpa) 1.75 7.95 11.3 10.8 12.6 22.9 a(Mpa) -1.38 -6.94 -9.60 -9.53 -1.07 -2.08 b(×1E-7) 6.66 3.21 2.29 2.61 2.27 1.38 Conclusions Based on the laboratory experiments on mechanical properties of rock blocks and field tests on single fracture plane, the mechanical parameters are transformed into the mechanical parameters of rock masses by stochastic mechanical analysis of the characteristic element in rock masses.The stochastic mechanical analysis method and the calculated mechanical parameters of rock mass can reflect the strength characteristics of rock masses in the field.
Determination of mechanical parameters of rock mass from Yunxi Datun Tin Mine.
Online since: August 2019
Authors: Darminto Darminto, Triwikantoro Triwikantoro, Mashuri Mashuri, Mohammad Syaiful Anwar, Khoirotun Nadiyyah, Affandi Faisal Kurniawan
The development of graphene is interesting because of its extraordinary chemical and physical properties since graphene was discovered through mechanical exfoliation in 2004.
Furthermore, the process of mechanical exfoliation was performed by ultrasonic cleaning for 6 hours.
Some factors that influence dielectric loss include relaxation of dipolar, interfacial or Maxwell-Wagner-Sillars polarization, defect-induced polarization or loss, oxygen functional groups on the graphene surface and so on [11].
Baqiya, Darminto, Defect and Magnetic Properties of Reduced Graphene Oxide Prepared from Old Coconut Shell, IOP Conf.
Xu, Preparation and electromagnetic properties of multiwalled carbon nanotubes/Ni composites by γ-irradiation technique, Mater.
Online since: December 2013
Authors: Meng Shu Wang, Ding Li Zhang, Zhai Hai Wei
Under the influence of external environmental factors (load, temperature, etc.), the state of material would vary.
The ability of a structure to resist the influence of external factors is one of the basic properties of materials. 1.1 Basic assumptions The presence of full state function is based on the following assumptions: (1) The material is composed of a large amount of basic elements which form a structure; (2) The structure of the materials can be destroyed.
When the strength of the material does not vary with the external factors, the diameter of tubular surface would no longer vary.
The actual material properties are very complex.
Therefore, these variables are actually the influential factors for directions.
Online since: October 2014
Authors: Gui Qin Li, Hong Bo Li, Xiao Yuan, Yang Chen, Bin Ruan
But, the effect of various factors on the properties of plastics is a significant challenge to ensure the safety of vehicles.
The function includes several adjustable parameters to match the change of properties caused by the factors such as temperature etc.
So, the modified model concerns the factor of time as a minor one and cancels the relaxation tests which shorten the test cycle for obtaining the properties of plastics.
Finally, it follows from the adjustable functions and boundary conditions that , (2) where E describes elastic properties, A and B characterize its properties plastic flow and constant k stands for properties of material.
[10] Hufenbach W, Gude M, Böhm R, The effect of temperature on mechanical properties and failure behaviour of hybrid yarn textile-reinforced thermoplastics, J.
Online since: July 2017
Authors: Eleanora Anatolievna Petrakovskaya, Lyudmila Vasilevna Kashkina, Olesya Pavlovna Stebeleva, Tatyana Yuryevna Yemelyanova
Changes in the properties of brown Kansk-Achinsk coal after exposure to microwaves have been studied using scanning electron microscopy (SEM) and electron magnetic resonance (EMR).
Microwave drying affected grindability of coal in samples 2 and 3.
EMR method applied to study the effect of microwave drying on coal makes it possible to investigate the relationship of structure and electron properties of the coal matter.
In [10] the investigation of physical-mechanical (elastic) properties of coals disclosed their affinity with properties of glasslike solid bodies.
The value of g-factor for R1 and R2 is bigger than the g-factor when the electron position is fixed (g-factor = 2.002322).
Online since: July 2011
Authors: Bo Huang, Zeng Wen Liu
The cutting force is the key factors influencing the processing precision and efficiency in special-shaped stone production.
The cutting force is the key factors influencing the processing precision and efficiency in special-shaped stone production.
So the cutting force affects the processing precision, the tool life and the processing cost.
The main composition and physical properties of the granite are shown in Table 2.
Table 2 Main composition and physical properties of the granite Main composition (%) Physical properties SiO2 Al2O3 CaO MgO Na2O K2O Compressive strength (MPa) Bending strength (MPa) Shore hardness (HS) 49.6 16.8 10.4 9.2 3.7 8.8 262.2 27.1 81 The cutting parameters are shown in Table 3. ap is the cutting depth, which is constant. f is feed rate in mm/s. v is the peripheral speed of the cutter in m/s.
Online since: September 2013
Authors: Jin Hua Yin, Rong Jin, Jin Yu Dong, Xing Zhao
Polymer/TiO2 nanocomposite films have good mechanical, electrical and thermal property, which are applied to electrical engineering and microelectronic technique field extensively.
Under the condition of high heat it still has outstanding dielectric properties, mechanical properties, corrosion resistance and performance under low temperature.
Although the traditional insulation materials have special properties, it can't provide long-term protection by corona discharge in the practical application, eventually leading to breakdown [5-8].
References [1] Chiang P C,Wang W T,T sai M H,et al.Physical and Mechanical Properties of Polyimide/titania Hybrid Films[J].Thin Solid Films,2004,447-448:359-364
Synthesis an Optical Properties of Polyimide-silica Hybrid Thin Films[J].Chem.Mater.,2002,14:4242-4248
Showing 7491 to 7500 of 26166 items