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Online since: December 2013
Authors: Bor Hann Huang, Hao Ming Hsiao, Chun Ting Yeh, Tsung Yuan Wu, Li Wei Wu, Hsiao Nan Yang
The material properties of L-605 cobalt-chromium alloy were used along with the ABAQUS von Mises plasticity model with isotropic hardening.
The local controller adjusted the blowing of assistant gas (air and nitrogen) to reduce the heat affected zone.
Results and Discussion Effects of Reservoir Location on Stent Mechanical Integrity.
However, for the proposed depot stent, the fatigue safety factor was reduced marginally by only 13% when compared to the standard case (Figure 5(c)).
The radial strength and the fatigue safety factor of the proposed depot stent were reduced by only 10% and 13%, respectively.
Online since: August 2013
Authors: Zi Yu Zhao, Su Zhi Zhang, Jin Guo Yang
It not only seriously affect the wear of diamond grinding wheel and service life, but also affect the stone surface quality and processing efficiency.
D.Shouji[6] etc. analyzed mechanical properties of rock deformation mechanism and failure criterion, constitutive relation of high-temperature by the point of view of temperature-stress.
The thermal stress is an important factor to lead to rock damage.
When the temperature is higher than 500℃, the sharp decline in the overall physical and mechanical properties lead to the grinding force falling largely , which reduce the loss of the grinding wheel obviously.
Our study shows that the main factor which influences the grinding force is temperature.
Online since: October 2011
Authors: Ke Zhu, Sugumar Suresh
The numerical simulation of composite forming is an efficient means of evaluating factors related to the manufacturing process, and helps to obtain optimum processing parameters.
In this study, the influence of the stamping parameters is determined on the flexural properties, void content and void distribution.
The mechanical properties thus obtained, were compared to the properties obtained by compression molding and by stamp forming of the pre-consolidated fabric.
For a 1485gsm fabric, the flexural properties obtained were lower but for a 743gsm fabric, the flexural properties obtained were equivalent to the optimal properties of compression molding process.
For each material form, the effects of the stamping parameters on flat plaque properties were examined.
Online since: December 2019
Authors: O.N. Salnikova, N.N. Onoprienko
In this regard, it is necessary to study the factors making possible to regulate the shrinkage and the solutions adhesion.
One of the important factors determining the adhesion strength is the cement-polymer composites shrinkage during hardening.
Rebinder [14] a cement stone elasticity high modulus leads to its low deformative properties, because it is associated with the predominance of hard and solid crystallization contacts in the cement stone structure.
It is known that modifying additives affect the majority of physical and physical-mechanical properties of cement systems.
The possibility of regulating the solidity, bearing capacity, deformative characteristics of cement-polymer materials, masonry, physical and mechanical properties of bricks due to the use of water-soluble polymers in the solutions composition is shown.
Online since: June 2014
Authors: Abdul Hadi, Junaidah Jai, Sakinah Mohd Yusof, Roslina Ismail, Md Amin Hashim
In developing soldered constructions (assemblies), the physical and mechanical properties of materials and material-based solders, the physical and chemical stability of solders, and their compatibility with coatings to be soldered were the crucial part to take into account [2–6].
These factors bring significant influences on the behaviors of products, such as magnetization, density, ductility, wear resistance, corrosion resistance, porosity, molecular structure, crystal properties, etc. [9].
The hydrogen evolution lead to the rise of bubble formation that often get incorporated in the crystal lattice, adversely affect the structure and properties of the metal being deposits by resulting in porous and spongy deposits[12], [14].
These results suggest that pH of the electrodeposition bath is closely associated with deposition properties such as average size of particles and density and compactness of resultant electrodeposited film.
Palumbo, Nanostructured Materials (Second Edition) Processing, Properties, and Applications, 2007, pp. 235–292
Online since: October 2013
Authors: Shu Ying Hao, Qi Chang Zhang, Li Jun Ma
Thick crescent iced sub-conductors spacing influence on the aerodynamic properties Li-jun MA1, a, Shu-ying HAO1, b and Qi-chang ZHANG2, c 1Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems, Tianjin University of Technology, Tianjin 300384, China; 2School of Mechanical Engineering, Tianjin University, Tianjin 300072, China a41612519@qq.com, bsyhao@tju.edu.cn, cqzhang@tju.edu.cn Keywords: FLUENT, iced conductors, aerodynamic coefficient, wake flow, sub-conductors spacing.
Studies show that aerodynamic coefficient of downwind sub-conductors affected by wake-flow, with the upwind sub-conductors there is always a big difference.
However, because the wind tunnel test is expensive, it can be instead of numerical simulation research the aerodynamic properties of iced conductors.
Fig. 1 Sub-conductors layout Fig. 2 Whole grid of attack angle 45 degree Meshing is the basis for solving the equation, the quality of the mesh will directly affect the accuracy of the results.
Wake’s cause and mechanism In velocity field, the component of conductor drag is the differential pressure from front and behind of the conductor and viscous force, differential pressure is the main factor affecting the aerodynamic drag because of air viscosity is very small.
Online since: October 2016
Authors: Donato Sorgente, Gianfranco Palumbo, Vito Piglionico, Antonio Piccininni, Luigi Tricarico, Pasquale Guglielmi
In fact, preliminary tensile and Nakajima tests (both at room temperature and in warm conditions) revealed that the mechanical and formability properties of the investigated alloy are strongly affected by the strain rate.
Aluminium (Al) alloys are well suited for this purpose: high mechanical properties and low density make them particularly attractive for the automotive industry [4–6].
Table 1 AA5754 chemical composition Al% Cr% Cu% Fe% Mg% Mn% Si% Ti% Zn% 93.6 – 97.3 < 0.3 < 0.1 < 0.4 2.6 – 3.6 < 0.5 < 0.4 < 0.15 < 0.2 Evaluation of mechanical properties.
Evaluation of formability properties.
It is worthy of notice that the temperature increase led to a strong reduction of the mechanical properties of the alloy.
Online since: December 2012
Authors: Simul Banerjee, Subhash Chandra Panja, Sunil Hansda, Haradhan Soren
The FRP components are superior to other materials due to their particular mechanical and physical properties such as high specific stiffness, fatigue limit, high damping, good corrosive resistance and low thermal expansion which enable the structural design more flexible than conventional metals [1].
The selected factors and their levels chosen for drilling operation of GFRP composite were tabulated in Table 1.
Fig. 1: Scheme of the delamination factor Table 1 Factors and levels selected for drilling GFRP composites Factors Level1 Level2 Level3 Material thickness, t [mm] 8 12 16 Drill diameter, D [mm] 10 12 14 Spindle speed, N [rpm] 400 800 1100 Feed rate, f [mm/rev] 0.1 0.175 0.275 Numerical Analysis In this present work, to analyze the process capability of drilling on GFRP composites, 72 numbers of experiments were conducted and corresponding values of delamination factor are determined.
Machaly: Factors affecting the machinability of GFR/epoxy composites. composite Structures.
Spiring: Some properties of the family of inverted probability loss function.
Online since: December 2016
Authors: Saulius Vaitkus, Sigitas Vėjelis, Agnė Kairytė
Results and discussion Density and mechanical properties The effect of different TCAs can be observed from Fig. 2.
Mechanical properties of PU/PWS foam composites coupled with TCAs: a) compressive strength; b) tensile strength Mechanical properties of the prepared foams with different types and amounts of TCAs are presented in Fig. 3.
Neon, Effects of titanate coupling agent on rheological behaviour, dispersion characteristics and mechanical properties of talc filled polypropylene, Eur.
Khalil, Effect of a silane coupling agent on the properties of white rice husk ash-polypropylene/natural rubber composites, Polym.
Ishak, Effect of titanate coupling agent on the mechanical, thermal and morphological properties of poly(methyl methacrylate)/hydroxyapatite denture base composites, J.
Online since: January 2017
Authors: Yang Wang, Yu Chuan Jiang, Da Huo, Jin E Xu, Hao Chun Yan
Introduction The adaptability of polycarboxylate superplasticizer and cement is affected by many factors including type and properties of superplasticizer, composition and fineness of cement, type and dosage of mineral admixtures [1-4].
Many scholars [9-13] at home and abroad studied the influence of stone dust on workability, mechanical properties, and durability of concrete.
So the similar internal structure of mortar and concrete determines their macroscopic properties of approximation.
It also can better reflect the rheological properties of concrete.
Yu, Analysis of factors of affecting sultability of concrete additives and cement admixture, Coal Ash China, April, 2007, 47-48
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