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Online since: July 2014
Authors: S. Thiyagarajan, M. Surianarayanan, S.P. Sivapirakasham, P. Bineesh, Jose Mathew
This technique analyzes potential causes and consequences of fires, explosions, releases of toxic or flammable chemicals and major spills of hazardous chemicals, and focuses on fluid system, machining system, electrical & instrumentation system, utilities, human actions and external factors that might impact the process.
The flash point of the dielectric fluid is an important factor which can cause fire hazard.
Different base metals used may have different heat conductivity and electrical conductivity which can affect the process temperature which may result in variation in emission of aerosols.
The use of different electrodes may have different heat conductivity and electrical properties which can vary the process temperature resulting in variation in the emission of aerosols.
Conclusions This work is a fairly rigorous exercise on the possible process deviations in the electrical discharge machining process due to various factors.
Online since: April 2015
Authors: Agus Supriyadi, Sandy Raditya, Stefanus Adi Kristiawan
The success of these materials for patch repair application relies on several properties.
The desire property will be a similar elastic modulus between the two materials.
Proportion of patching material Cement Fly Ash Sand UPR Hardener (kg/m3) (kg/m3) (kg/m3) (kg/m3) (%)* (%)** (kg/m3) *** 731,6 129,1 860,7 430,4 35,42 50 12,9 *% of total volume of mortar; ** % of total filler by weight; *** % of UPR by weight Characterization of Mechanical Properties Both concrete and UPR mortar used for fabricating beam specimens have been tested to determine their mechanical characteristics.
Ductility factor of reinforced concrete beam Cracking Pattern.
The density of cracking of the beam will affect the stiffness of the element.
Online since: October 2011
Authors: Wen Zheng Huang
Chemical Protection of Masonry Material .Most of the masonries in ancient architectures are exposed to the outdoors, due to atmospheric changes, wind and rain erosion, microbiological corrosion and properties of masonry material itself and other factors, they are inevitably destroyed by weathering.
Chemical protection for masonry materials requires the surface of masonry cultural relics can inhibit the penetration of external water and without affecting the internal moisture to escape.
Requirements for material performance are close to the physical and mechanical properties of reinforced masonry, and in accordance with requirements of good adhesion, low viscosity, good irrigation, good penetration ability, can be cured at room temperature, freeze-thaw resistance, water resistance, etc...
Important Notices for Applied Chemicals in the Restoration of Monuments Application of applied chemicals in the restoration of monuments should conduct a full investigation and research on the monuments and their surroundings, including atmospheric, meteorological factors, the type of corruption, the extent of damage, material analysis, and reason evaluation and so on.
Pore-structure and water transport properties of surfacetreated building stones.
Online since: January 2013
Authors: Jian Gang Sun, Tie Jun Li, Xue Sen Zhang, Mei Ying Chen
As the core components of the high speed friction and wear test system, the dynamic performance of the ultra-high speed rotary system directly affects the working stability and reliability of the whole system.
Rotating disk is one of the basic mechanical components widely used in rotating machinery.
To realize the coating skiving experiment, high speed rotary table of the ultra-high speed friction and wear test system is not only affected by factors such as support bearing, unbalance mass and so on from the internal system, but also affected by Intermittent skiving impact.
Mode is inherent in the mechanical structure of the vibration characteristics, each mode has a specific natural frequency, damping ratios and mode shapes.
A New Method for Evaluation of Mechanical Properties of Sealing Coating[J].
Online since: December 2012
Authors: V. Muthupandi, Katakam Sivaprasad, B. Srinivas, N. Kishore Babu, P. Susila
Room temperature hardness and tensile properties of the weldments in the as-welded condition were studied and correlated with the microstructure.
It was reported that welding speed and wire parameters are the most important factors that avoid hot cracking in Al-Mg-Si alloys [4].
The present study focused on the dissimilar laser welding of AA6061 to AA5083 to study the influence of thermal conductivities of the individual alloys on the joint structure and mechanical properties. 2.0 Materials and Experimental procedure: Sheets (4 mm thick) of AA5083 in H111 condition and AA6061 in T6 condition were used in the present study.
In 360 µm beam spot size, increase in hardness is observed than in 180 µm, this is because of the high heat that is producing with the higher cooling resulting the better properties.
Table 3 Tensile properties of the weldments at different conditions Condition Yield strength (MPa) Ultimate tensile strength (MPa) % Elongation 1 162 180 7 2 155 172 4 3 179 195 6 4 173 198 5 5 201 241 6 6 196 228 7 3.3 Fractography of tensile samples: The fracture surface of tensile specimens was characterized by SEM.
Online since: January 2013
Authors: Fu Xiang Wei, Gen Xi Yu, Zhi Ling Wang
Effects of compound additives on properties of cermet inert anodes Fu-xiang Wei 1, a, Gen-xi Yu1 and Zhi-ling Wang2 1 School of Materials Science and Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China 2Jiangsu province xuzhou technician institute, Xuzhou, Jiangsu 221116, China aweifuxiang2001@163.com Keywords: Cermet, Inert Anode, Two-step Sintering, Compound Additive.
This compound offers a good combination of physical and chemical properties such as high melting-point, good resistance to chemical attack, high thermal stability, and consequently it is the preferred material as ceramics inert anode.
Sintering additive is an effective method to increase cermet mechanical properties and electric conductivity.
Although is approximately a constant within a certain range, it can be affected by several factors: the carrier concentration in the material structure, the quantity of charge, the average transition distance, the transition frequency, and the environment temperature T.
Online since: June 2019
Authors: Qun Hu Xue, Li Biao Xiao, Xiao Qing Hua
Addition of different types of calcined bauxites to the ceramic plate formulation was performed to study effects on the firing and properties of the resulting ceramic plates.
The degree of secondary mullitization was the main factor affecting the performance of the ceramic plate.
Zanelli, et al, Processing and properties of large-sized ceramic slabs, Boletín De La Sociedad Española De Cerámica Y Vidrio, 4 (49) (2010) 289-295
Bó, et al, Effect of reduction of thickness on microstructure and properties of porcelain stoneware tiles, Ceramics International, 9 (40) (2014) 14693-14699
Romero, Effect of microstructure on mechanical properties of porcelain stoneware, Journal of the European Ceramic Society, 30 (15) (2010) 3063-3069.
Online since: November 2012
Authors: Chun Hua Zhao, Ya Lan Luo
Main influencing factors were obtained by comparing simulation results, so as to make preparations for further optimization.
The results of the analysis of divider showed that the deformation with powering disc tooth blade was mainly affected by its diameter, rotational speed and thickness.
The greater thickness was good to dividing, but mechanical deformation and the whole weight imbalance became more serious.
The high rotational speed caused shock, mechanical deformation and more serious power consumption.
The mechanical properties test on peas stalks [J].
Online since: June 2013
Authors: Xiang Li, Hao Cheng, Guang Fu Zhou, Jiang Min Ding
Interfacial performances which affects machine tool bed’s performance includes damping property and mechanical property mainly[3].So the design of compounding process mainly focused on guaranteeing these two properties, and factors which affects interfacial performance includes mainly the surface qualities of silicate cement concrete inner core, temperature and properties of resin concrete.
Take these three factors as criteria to conduct experiments, compounding process will be designed on the basis of experiment results.
Composite concrete machine tool bed model and sensor arrangement is shown in figure6,the test result about first mode of composite machine tool bed is shown in figure7, the simulation result about first mode of composite machine tool bed is shown in figure8, Fig.6 Composite concrete machine tool bed model and sensor arrangement Fig.7 The test result about first mode of composite machine tool bed Fig.8 The simulation result about first mode of composite machine tool bed 4 Summary ⑴ The process of composite concrete manufacturing and compounding is reasonable, which guarantees the properties of high damping ratio, high stiffness ratio, corrosion resistance, cracking resistance, small thermal deformation and so on. ⑵ Composite concrete has excellent performance, especially the high damping ratio property.
Online since: March 2009
Authors: Masumi Saka, Hironori Tohmyoh, M. Muraoka, Yang Ju, K. Sasagawa
Finally, regarding evaluation of mechanical and electrical properties of the micro/nanomaterials, the concentrated-mass cantilever technique in atomic force acoustic microscopy and the four-point atomic force microscope technique are shown to be powerful tools, respectively.
Excellent properties of carbon nanotube such as mechanical, electrical, optical and thermal properties are expected to be used in many fields of applications.
Finally, the special techniques based on atomic force microscopy (AFM) for evaluating the electrical [11] and mechanical properties of MNMs [12] are reported.
However, in the actual situation, it is not an easy task to determine the temperature of atoms in advance because the temperature of atoms is affected by a number of factors such as the current density, substrate temperature and the geometry of the slit.
Moreover, new techniques based on atomic force microscopy are powerful tools in evaluation of electrical and mechanical properties of micro/nanomaterials.
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