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Online since: May 2016
Authors: Hussin Kamarudin, A.M. Mustafa Al Bakri, Che Mohd Ruzaidi Ghazali, Mohammed Binhussain, Nur Ain Jaya, Roszilah Ahmad
It has favourable properties such as natural whiteness, fine particle size, and non-abrasiveness and chemical stability.
The samples were sintered at the same sintering temperature of 900 °C to ensure uniform measurements taken to assess the properties.
Provis, J.L., et al., Correlating mechanical and thermal properties of sodium silicate-fly ash geopolymers.
Yan, Synthesis and mechanical properties of metakaolinite-based geopolymer.
Yeh, Sintering effects on the development of mechanical properties of fired clay ceramics.
Online since: July 2008
Authors: Li Kai Shi, Zhi Feng Zhang, Jun Xu, Yi Dan Zeng
Introduction Among semi-solid forming processes, increasing interest has recently been paid on the rheoforming process due to its advantages such as the efficiency in cost and productivity, and the consistency of mechanical properties in comparison with thixoforming one [1].
However, it is still most important to produce high quality semisolid slurry characterized by globular solid particles surrounded in a liquid phase in an appropriate ratio at temperature ranges for semisolid state, changing its shape easily by a small force due to its thixotropic properties [2].
Although these methods appear to be promising for future industrial applications, there exist some limitation to be overcome for mass production, such as low productivity, high production cost, and non-uniformity of microstructures, consistency and soundness of mechanical properties.
Rotating speed and temperature of rotating plate mainly influence the nucleation, while holding temperature affects particle growth.
Very similar to increasing the rotation speed, decreasing temperature of rotating plate can make the superheat and latent of thin liquid film extract quickly, leading to particle size decreasing, as indicated in Fig. 2(a). while particles size and shape factor Fig.3 The particle size and shape factor of primary α-Al phase as functions of various process conditions: (a) as a function of cone-shaped plate; (b) as a function of rotation; (c) as a function of holding temperature. 400 450 500 550 600 62 64 66 68 70 72 74 76 78 0 1 2 3 4 5 shape factor particle size (um) holding temperature (C) 1--particle size 2--shape factor (c) 300 350 400 450 500 550 600 650 48 49 50 51 52 53 54 2 3 4 shape factor particle size (um) temperature of cone-shaped plate (C) 1--particle size 2--shape factor 1 2 (a) 0 200 400 600 800 1000 1200 1400 1600 46 47 48 49 50 51 52 53 54 55 1 2 3 4 shape factor particle size
Online since: May 2008
Authors: Jan Van Humbeeck, Sergey Kustov
Damping properties of SMA Sergey Kustov1 and Jan Van Humbeeck 2 1Dep.
Several equivalent characteristics of damping are used, depending on the experimental technique employed to measure damping properties.
(2) The inverse quality factor, Q -1, and the specific damping capacity, Ψ , are W W W W Q ∆ =Ψ ∆ = − π2 1 . (3) Equations (2) and (3) indicate that all basic damping characteristics are interrelated through numerical factors: 1 22 − ==Ψ Qπδ
Even in absence of formation of equilibrium phases (limited diffusion, not too high temperatures, typically below 0.3 Tm) structural relaxation affects strongly the damping properties of martensites.
In fact, damping properties of martensites, associated with the motion of linear/planar defects, can be affected strongly also by the diffusion, assisted by these linear/planar defects.
Online since: August 2011
Authors: Jacob Notbohm, Jin Hong Kim, Anand Asthagiri, Guruswami Ravichandran
Introduction The mechanical behavior of cells has been shown to affect cell adhesion, growth, differentiation [[] D.E.
For these cells to adhere, mechanical forces must be present.
In the model, the substrate properties are chosen such that they match the properties of the polyacrylamide gels that are used as substrates in the experiments: the substrate is modeled with linear elastic 8-node bricks with Young’s modulus of 7.1 kPa and Poisson’s ratio of 0.48.
Contact inhibition and scattering have been shown to have chemical cues such as growth factors [[] J.H.
We are currently studying this hypothesis by investigating how cells respond to mechanical cues such as substrates of different stiffness and to chemical cues such as epidermal growth factor.
Online since: January 2012
Authors: Guo Dong Zheng
The main impact factors of Pinghai Bridge structural durability Chloride corrosion.
The main ways and design ideas sea of improving the durability of cross-sea engineering structures The main affecting factors of the durability include the structural design, material properties, construction quality, maintenance, operation and maintenance of components.
To improve the durability of reinforced concrete structures, we can start from the following main influencing factors.
At the same time advances and improvements of the research on concrete admixtures to improve durability are got for the high-performance concrete has lower cost and can improve various physical and mechanical properties of concrete.
The durability factors mainly considered is the reinforcement corrosion, alkali-aggregate reaction and thermal stress cracks due to chloride ion penetration.
Online since: June 2020
Authors: Rosdi Daud, M.M. Mustaqieem, A. Shah, Andril Arafat, M. S. Dambatta, Hassan Mas Ayu
Dambatta4,f 1Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia 2Faculty of Technical and Vocational, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak, Malaysia 3Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Padang, 25131, Air Tawar Padang, Sumatera Barat, Indonesia 4Department of Mechanical Engineering, Faculty of Engineering, Kano University of Science and Technology Wudil, P.
Many factors affect load transfer at the bone implant interface such as the type of loading, material properties of the implant and prosthesis, implant geometry, surface structure, implant design quality (diameter and length) and quantity of surrounding bone, and nature of bone implant interface [3, 4].
However, a key factor for the success of a dental implant is the particular way of stresses that are transferred from implant to the surrounding bone.
The material properties of the implant system and the mandibular bone used to setup ANSYS for analysis are shown in Table 1.
References [1] Mas Ayu, H., et al., Improving biocompatibility of cobalt based alloy using chemical etching and mechanical treatment.
Online since: September 2013
Authors: Xie Li
Factors which affect springback can be divided into two categories for a certain material of sheet.
The factors which are related to mould, like punch radius, die radius and die span etc.
The other factors are those which are related to the bending process like punch displacement friction coefficient etc.
T[1] researched on the examination of springback of sheet metals with several thicknesses and properties in bending dies.
Moving the punch up. 5.Measuring the bending angle after springback by the profile projector The basic mechanical properties of ST12 as expriments material are given in Table 1.
Online since: November 2013
Authors: Muhammad Yusuf, N. Ismail, S. Sulaiman, M.K.A. Ariffin
This is due to some superior properties of these materials such as high strength-to-weight ratio, excellent low temperature performance, exceptional corrosion resistance, high machinability index and comparatively low cost [1, 2].
Various properties of MMCs, such as strength-to-weight ratio, thermal stability, wear and corrosion resistance, are superior to those of their constituents [3].
A lot of factors affect the surface condition of machined part.
Although many factors affect the surface roughness of machined part such as feed rate, tool geometry, and productivity of machine tool.
The difference between theory and actual surface roughness may be caused by the factors such as workpiece material, built-up edge formation, chip formation, tool wear, tool vibration, workpiece vibration.
Online since: January 2016
Authors: Jaroslav Juračka, Tomáš Katrňák
Structural optimization is the process of such a design which fulfils all requirements and simultaneously minimizes weight or other efficiency decreasing factors.
Optimization methods The structural optimization is a design process which fulfils all strength, stiffness and fatigue requirements, and minimizes weight or other efficiency decreasing factors.
Optimum design There are several parameters which directly affect the convergence of optimization.
The criterion CONV1 controls a relative difference in the objective function and the criterion CONVPR derives a limit for the maximum of relative property changes.
These two management parameters affect length of the optimization process.
Online since: July 2013
Authors: Le Hua Yu, Shuang Xi Zhou, Wen Wu Deng
Meanwhile it was discussed that quality characteristics of pavement concrete was changed with main construction factors included milepost distance, section distribution, half-side spatial position, construction time and other environment.
Furthermore, a discussion on the factors affecting the concrete quality and the methods promoting the concrete was presented.
It was produced by New Century Cement Co., Ltd in Guixi Country of Jiangxi Province, and its properties were expressed in Table 1.
Table 1 Main properties of the cement Fineness[80μm sieve residue wt %] Stability Setting time[min] Flexural strength[MPa] Compression strength[MPa] Initial Final 3d 28d 3d 28d 3.6 Qualified 58 465 4.2 7.9 18.6 46.9 River sand taken as fine aggregate with a fineness modulus of 2.9, was sourced from Yiyang sand factory located in Yiyang Country.
Here fcs is defined as the threshold value that the pavement concrete can be predicated to meet works requirement on mechanical property in case of flexural strength above it, and the fcs is obtained from equation (1).
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