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Online since: September 2018
Authors: Fatima Tuz Zahra, Muhammad Anis-ur-Rehman, Faiza Arif, Omer Farooq
AC electrical properties i.e. ac conductivity, loss factor, dielectric constant and impedance studied as a function of frequency (20Hz-3MHz).
The performance of thermoelectric materials depends on different factors, like electrical conductivity (σ), thermal conductivity (κ) and Seebeck coefficient (S).
AC electrical properties i.e.
Bae, Thermoelectric properties of Bi2Te3 material doped with lanthanum by mechanical alloying, Taylor and Francis. 38 (2008) 143-147
Dong, The structural and magnetic properties of gadolinium doped CoFe2O4 nanoferrites, J.
Online since: March 2020
Authors: A.V. Mysin, Gennady P. Paramonov, Vladimir N. Kovalevskyi
Introduction Up to date, there is no comprehensive procedure for evaluating the explosion action on a destructible medium which would take into account all the factors affecting the explosion result.
As a result, the elongated charge explosion energy transmitted to the medium in a particular section of the hole (well) depends not only on the EXP amount per unit length of the hole (well), but also on the entire charge explosion energy, explosion development over time, physical and mechanical properties of the medium along the hole (well) length.
The power characteristics of the impulse pressure are defined by: · charge structure; · charge weight; · EXP properties.
And by the equation of the shock adiabat of the pad material compression: where – initial density of the pad material; – shock adiabat factors of the pad material.
In addition, the main crack final length is affected by the relative distance between the ECC and the hole wall, which determines the initial cumulative "knife" digging depth and the physical and mechanical properties of the rock block being destroyed.
Online since: December 2012
Authors: Xie Xing Tang, Xiao Yong Luo, Qi Sun, Ya Chuan Kuang
Though there are many researches available mainly focusing on bond property, strength of material and fire-resisting performance, the mechanical property of GFRP bolt under freeze-thaw cycle conditions is hardly involved in researches[7-8].
Mechanical property See table 3 for the average value of each group and the change rate of comparison after the test results of tensile property of GFRP bolts are handled.
The degradation of resin also affects the fiber and the property of boding interfaces.
Study on varying pattern From the above analysis, the mechanical property, to some extent, has certain relation with the times of freeze-thaw cycle.
Considering factors such as the pattern of curve, residual, and determining coefficients, the Cubic function-- is used to fit the change of ultimate tensile strength and elastic modulus of bolts after freeze-thaw cycle.
Online since: December 2016
Authors: I.N.G. Wardana, H. Mardin, Pratikto Pratikto, S. Wahyono, Kamil Kusno
Some other factors such as fiber surface area, structures and porosity are relatively neglected in concern of adhesion between fiber surface and the matrix [9].
This phenomenon is closely related to the decreasing hydrophobic properties of fibers and promotes reactions of polymerization of the two materials components.
Surface morphology of palm sugar fiber affected by sea water immersion treatment has significantly improve mechanical bonding between the fiber and the natural sago matrix.
[5] Ishak M.R, Sapuan S.M, Leman Z, Rahman M.Z.A, Anwar U.M.K, (2012) Charakterization of Sugar Palm (Arenga Pinnata) Fiber Tensile and Thermal Properties, J.
Ramanand N, (2015), Surface Morphology & Mechanical properties of Some unigqui Natral Fibre Reinforced Polymer Composites-A Review, J.
Online since: October 2010
Authors: Zhen Bo Wang, Geng Huang He, Zhao Hui Cai, Dong Kai Jia, Li Xu
As the heart of the aircraft, aircraft engine is the decisive factors of aircraft performance.
All these properties mean that it will produce a higher and more concentrated cutting force when the blades are being machined then generate cutting vibration.
The main factors affecting the deformation are as follow
(1) The impact of impeller blade material and structural properties on processing deformation.
To sum up, different processing routines will produce different work-piece deformation for the same material and structural properties because of complex interaction of these factors
Online since: June 2024
Authors: Khudhayer J. Jadee, Noor Alhuda Hayder Ali, Mohammed Ali Nasser
Theoretical and numerical analysis focused on two main factors which are the spring force and the variation of the stress at a specific locations across the spring section related to the deflection.
In the FEM analysis, the used mechanical and physical characteristics properties of the Belleville spring material should be settled during the simulation, so that to identify the purpose of design analysis.
The mechanical strength properties were included in the ANSYS APDL program, these properties are obtained from the mechanical and physical qualities documents as in Ref [10] and These mechanical and physical properties used in the simulation are listed in Table .2.
The used physical and mechanical properties of the Belleville spring material in the numerical analysis, [10].
According to this analysis, two factors that have been discussed in this work, the main conclusions are as follow; 1.
Online since: October 2014
Authors: Xin Rong Li, Chang Sheng Liu, Sui Yuan Chen, Yu Ning Bi, Daniel Wellburn, Jing Liang
The results indicate that the mechanical properties of the composite materials are improved after adding copper-coated carbon fibers.
The carbon fiber in the composite materials are prone to be pulled out, peeled off or shed when it is subject to load; these factors severely limit the applications of the composites.
The mechanical properties of theself-lubricating composite materials The mechanical properties of the self-lubricating composite materials reinforced by carbon fiber are shown in Table 2.
The optimum mechanical properties are found when the carbon fiber volume fraction is 11%: the hardness reaches 57.8HV and the strength 222Mpa.
The mechanical properties first increase, then decrease with the increase in carbon fibre volume fraction.
Online since: January 2012
Authors: Xian Shu Zheng, Mao Shun Chen, Ling Sun
The excellent electrical properties of CNTs can change the properties of polymeric matrix significantly; when its content is very low, the polymer/CNTs composites may obtain good electrical properties [2].
Its fine processability and mechanical property have make it been widely used in industrial field.
While in a lot of industrial productions, single screw extrusion process is still commonly used for polymer molding, but single screw extrusion molding oriented researches on the influence factors to conducting properties of polymer matrix CNTs composites are rare.
The same extruder is used throughout the experiment to avoid the above stated influence factors.
Influence of Nano-SiO2 on the Mechanical and Crystalline Properties of PBT.
Online since: May 2020
Authors: N.V. Bekrenev, Irina V. Zlobina
The microwave electromagnetic field helps to improve the damping properties of materials by 19.5% in average with a low impact energy.
With an increase in the impact force energy, the effect of the microwave electromagnetic field is manifested to a less extent; further improvement of the damping properties does not occur.
It happens not only because of the lightning discharges affecting, but also due to the accumulation of static electricity.
The presence of built-in metal LPC structures introduces additional factors affecting the difference in the perception of operational loads by the structures made of PCM from the calculated ones.
Prospective aviation and rocket complexes are highly mobile and used in conditions of hypersonic speeds in the atmosphere and near space, which demands higher mechanical and thermal strength of their structural elements having complex shapes, strongly affecting the distribution of dangerous mechanical and thermal stresses, as well as the perception of impact (dynamic) loads, including impact loads of high-speed solid objects.
Online since: January 2014
Authors: Amiruddin Ismail, Ramez A. Al-Mansob, Mohamed Rehan Karim, Mojtaba Shojaei Baghini, Foad Shokri, Ali Asghar Firoozi, Ali Akbar Firoozi
The results revealed that by adding Portland cement, the mechanical properties of the mixture have improved where the UCS is found to be an important quality indicator.
The focus of this research is to assess the factors affecting the performance and strength of CTB based on laboratory using Unconfined Compressive Strength (UCS), Indirect Tension test for Resilient Modulus (ITRM) and Flexure Strength (FS) tests, which are the most frequently employed method of CTB in the assessment of the degree of stabilization.
One of the most important factors in CTB is organic content.
Dry density of the compacted soil is one of the main factors that influence the strength of the CTB.
Xuan, D.X., et al., Mechanical properties of cement-treated aggregate material – A review.
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