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Online since: October 2011
Authors: Bo Tian, Da Peng Wang, Ji Liang Wang, Yan Cong Zhang
Type of aggregate affected the CTE significantly.
Besides concrete ages, there are many factors [5] known for affecting the coefficient of thermal expansion of concrete, including the types of coarse aggregates, relative humidity, admixtures, outline of specimen, etc.
Table 1 presents the sources and main properties of these coarse aggregates.
The mixing was further continued for about two minutes before evaluating the fresh concrete properties, for example, the slump, air-content, and density.
Results and analysis Fresh properties tests for concrete mixtures were conducted in accordance with the ASTM standards and the results are given in Table 4.
Online since: April 2019
Authors: Halimah Mohamed Kamari, S.O. Baki
Structural and Optical Properties of Er3+-Doped Zinc-Titania Tellurite Glasses S.O.
Such properties are correlated to its smaller spectroscopic quality factor χ ratio [16] and local structure of highly symmetry of Er3+ which possibly reduces any nonradiative energy transfer mechanism via energy migration or cross relaxation among the Er3+ ions, also known as fluorescence quenching effect [17].
Manikandan, Aleksandr Ryasnyanskiy, Jean Toulouse, Thermal and optical properties of TeO2–ZnO–BaO glasses, J.Non-Cryst.
Mahdi, Structural and optical properties of Er3+-Yb3+codoped multicomposition TeO2-ZnO-PbO-TiO2-Na2O glass, J.Non-Cryst.
Khamirul, Optical Properties of Ternary TeO2-B2O3-ZnO Glass System, Mater.
Online since: September 2008
Authors: Linda Stappers, Jan Fransaer, Annelies Malfliet
These composite coatings have useful thermo-mechanical properties for thermal actuators.
The properties of the metal-PCM composite coatings were examined by differential scanning calorimetry (DSC) and vertical dilatometry.
Other interesting properties of paraffin are its negligible undercooling, the absence of phase segregation and the fact that it is chemically inert.
The thermal and thermo-mechanical properties of the PCM-metal composite coatings were examined by differential scanning calorimetry and thermal dilatometry.
Since the matrix contains a plastic and elastic part and the particle contains a solid and a liquid component, the thermal and mechanical properties were homogenized by weighed averages.
Online since: August 2023
Authors: Franco Bonollo, Anders E.W. Jarfors, Ziyu Li, Vittorio Magrin
This factor infuences the total scrap amount in the industries, which can go up to 10% in percentage over the total production quantities [2].
Mechanical Proprieties.
The 2 and 2.5 m/s specimens have higher properties, as the peak moves to the right of the chart (between 5 and 6 % in 2 m/s samples, and close to 6% in 2.5 m/s specimens).
In these settings, the highest number of defects caused higher stress intensification factors (while applying the tensile load), therefore the fracture of the specimens occurred earlier.
The two cast cavities had distinct tensile properties, with the specimens from the right cavity having superior fracture elongations.
Online since: September 2011
Authors: Yun Cai Zhao, Shu Feng Huang, Xiao Mei Liu
The research shows: round pit texture has a certain influence on friction factor of coating’s surface and abrasion loss.
Foreword Wear-resisting coating prepared by supersonic plasma spraying has excellent mechanical property, friction and wear property, anti-oxidation and corrosion-resistance, so wide attention and application are received, and there are many researches about it to be reported[1-3].
The technical problem just can be solved by the laser remelting[4-5], and coating’s layer structure, most of pores and oxide inclusion are removed, forming uniform dense coating, thereby it ensures coating’s properties and improves working life of parts.
Friction coefficient is related to properties of boundary film and the distribution of surface effective gradient, property of boundary film is related to third-body bed, the increase of thickness of third-body bed can make effective gradient decrease, this is said the change of third-body bed can cause the change of friction coefficient.
Micro moulding has a certain influence on third-body bed, so it can be thought micro moulding has a certain influence on tribological properties.
Online since: September 2012
Authors: Yi Ning Song, Zhi Li
For practical modeling purposes, we consider agents to have certain properties and attributes: An agent is autonomous and self-directed.
Like satellite is one of the most dicisive factors in the space object system, satellite agents is to be forcus in our ASTS model.
Satellite agents own its properties and its behavior rules(see Table I).
The Properties Of Debris Agents Property Description Orbit Define a satellite's orbit, including propagator, coordinate system, orbital elements and time parameters.
The Properties Of Facilities Agents Property Description Position Define the location of the facility using one of several available position types.
Online since: August 2014
Authors: Shi Nan Li, Hui Chen, Yan Jie Zhang, Zhang Yu Gao, Li Zhen Liu, Bing Ma, Lu Ning Yu
It can be concluded that level of V concentration at the beginning of TD process is a vital factor for the forming of VC layer.
This paper deals with how the beginning V concentration affects the result of TD process on Cr12MoV.
[2] Zhitao HUANG,Wenhuai TIAN: Effects of Mo Contents in Matrix on Microstructure and Properties of Vanadium Carbide Coating Formed by Thermal Diffusion Treatment.
Hayes: Thermal stability and mechanical behavior of ultra-fine bcc Ta and V coatings.
[6] PENG Zhi hui, YANG Zhi bing , WANG Shaowu, GUO Yiwan: Effect of Rare Earth on Structure and Properties of Boronizing Layer.
Online since: December 2012
Authors: Jun Deng, Ning Fang Yue, Xin Hai Zhang, Yong Fei Jin
For example, the large rod diameter SHPH test system is used for the research on the mechanical properties of the rock [13], and the CT technology is used for the research on the evolution law of the damage to the rock [14].
Wang Shengzu [15] puts forward the three-axial test facility with the confining pressure medium such as argon and carbon dioxide which is used for the research on the mechanical properties of the rock at the high temperature ranging from 1000 to 1400℃ so as to meet the need of the quantitative research on the rock mechanism under the high temperature and high pressure.
Li Tangshan et al [25] make the analysis of the factors affecting the fire heating air pressure in the coalfield outcrop fire zone, and find out the calculation equation of the fire heating are pressure under the influence of the terrain and air velocity.
Journal of Chongqing University, 2011,34(11): 122~127 [13] Tubing Yin, Xibing Li, Zilong Zhou, Liang Hong, Zhouyuan Ye.Study on Mechanical Properties of Post-High-Temperature Sandstone[J].
Temperature Load Granite and Mechanical Properties of Evolution and Microscopic Mechanism Research[D].
Online since: November 2012
Authors: Xiao Chu Liu, Hua Liu, Jian Hua Tao, Xiao Jun Fei
The NC system design for strengthening and polishing machine Jianhua Tao1,a, Hua Liu1, b, Xiaochu Liu1,c,* Xiaojun Fei1, d 1School of Mechanical & Electrical, Guangzhou University, Guangzhou, 510006, P.R.China ajhtao@gzhu.edu.cn, bliuh2578@163.com, cgdliuxiaochu@163.com, dfxj0518@sina.cn, Keywords: Strengthening and polishing, The NC system, Design Abstract.
First, it designs the overall scheme of the system on the basis of taking all of the factors into account, and focuses on the injection system include its structure and working principle.
Therefore, the technology has many advantages over the traditional, such as the little changes in the physical and chemical property, no limitation from the workpiece shape and so on.
Of course, the external input signals also can affect its states. the corresponding planning structure diagram is shown in Figure. 2.
CNC machine tool mechanical structure and electrical control.
Online since: July 2015
Authors: Mathias Liewald, Ranko Radonjic, Fei Han
.=13(1+2r)1+r+ρrntR1 (2) Table 1: Factors that affect the strain value at the beginning of wrinkling Strain path in the pre-wrinkling process ρ Sheet thickness t Geometry of part 1R1, 1R2 Strain hardening exponent / Average vertical anisotropy n / rm Theoretically, the total deformation consists of two parts: elastic and plastic deformation.
Table 1 presents the factors that can affect the strain value by the wrinkling acquired from theoretical analysis.
At this point, it can be concluded that the strain value is influenced by the two factors strain path in the pre-wrinkling process (ρ) and the geometry of part.
It can be summarised that the only factor that affects the strain value is the geometry of part.
Loganathan, Effect of mechanical properties on wrinkling limit diagrams for Aluminium 5086 alloy annealed at different temperature, J.
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