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Online since: September 2013
Authors: Bin Li, Yue Xian Zhang
This study outlines the influencing factors of the conductive properties for carbon black filled conductive silicone rubber.
Silica added can affect the conductive properties.
Its conductivity is related to rubber matrix, types of filler, filler content as well as temperature and other factors.
The conductive silicone rubber has good electrical and mechanical properties and become a composite material[2-3] which is most widely used.
In the adding amounts up to 3%, the compound has the maximum conductive properties, if we continue to increase the amount, the conductive properties will be affected
Online since: April 2014
Authors: Guo Zhong Li, Fu Xing Wang, Juan Chen
Mechanical property of cement mortar was bad.
It would play a great impact on mechanical properties of cement mortar to improve interface bonding performance of RFA-cement.
The compatibility of admixtures had a significant impact on mechanical properties.
Table 6 shows that the admixtures play a larger impact on mechanical properties.
Compared to sample M7, the compressive strength of mortar sample M8 is increased by 80% and it indicates that compatibility of additives is a major cause which affects mechanical properties.
Online since: December 2006
Authors: Yong Jun Wang, Jun Biao Wang, Sheng Min Wei, Jiang Jun Jiang
In extrusion stretch bending process, there are many factors which affect springback of the workpiece such as mechanical properties of the material, friction condition and process parameters.
The springback of same batch of extrusion is different at same forming parameters because of the variation of the mechanical properties of the material and the friction condition.
The results from the experiment state that the intelligent control method can suit the variation of mechanical properties of material and friction condition and improve the geometry precision.
Introduction There are many factors which affect springback of extrusion stretch bending forming, such as mechanical properties of the material, friction condition and process parameters and so on.
The traditional stretch bending method can't suit the variation of the mechanical properties of the material and friction condition and lead to low forming quality.
Online since: August 2016
Authors: Ya Li Yi, He Rong Jin, Xu Kun Yang, You Wei Cui
The results show that heat treatment affects the mechanical properties and corrosion resistance of stainless clad plate significantly.
Therefore, further research to guarantee the corrosion resistance and mechanical properties of stainless steel clad plate is urgently required [6].
The mechanical properties of the experimental samples are shown in Table 2.
Based on overall consideration of various factors, the heat treatment process of oil cooling to 450℃and air cooling is more appropriate.
Chuang, et al, Effects of annealing on the mechanical and interface properties of stainless steel/aluminum/copper clad-metal sheets, J.
Online since: May 2012
Authors: Xiao Li Dong, Lei Wang
Interface mechanics characteristics and the mathematical model 2.1 Interface mechanics properties The mechanical characteristics of interface experiment results show that surface roughness is one of the main factors of mechanical properties.
The factors of soil’s gradation, density, grain shape also has important influence on the mechanical properties of the interface, in addition, the method to stress, boundary conditions and the stress path may affect the interface mechanical response.
As well as the elastic-plastic constitutive model, there is no elastic-plastic constitutive model can well and comprehensively reflect the main mechanical properties of the interface.
Because the soil-structure interaction mechanism is very complex and the influencing factors are various, the mathematical model which describes the mechanical behavior is very complex too.
Theory research is to solve the reason of the interface shear zone and the mechanical properties of the shear zone, and provide the basis for reasonably determining constitutive model.
Online since: December 2016
Authors: Ilze Salma, Janis Zarins, Mara Pilmane, Kristine Make
Aim of our preliminary in vivo study was to evaluate bone regeneration properties in three different bone conditions and to compare expression of OPG, NFkB105, BMP2/4, MMP2, IL 1 and IL 10 between healthy, osteoporotic and osteoporotic sham surgery affected rabbit bone controls.
From many described, some of bone homeostasis factors are more important in comparison to others.
Nuclear factor kappa beta 105 (NFkB105) belongs to the transcription factor family which regulates immune system and expression of cytokines, growth factors and inhibitors of apoptosis [3].
Therefore, the aim of our preliminary in vivo study was to evaluate bone regeneration properties in three different bone conditions and to compare healthy bone homeostasis factors between osteoporotic and osteoporotic sham surgery affected rabbit bone controls using OPG, NFkB 105, BMP 2/4, MMP 2, IL 1 and IL 10.
Thus, we can speculate that the decrease of bone regeneration properties in osteoporotic bone can be induced by the trauma.
Online since: October 2014
Authors: Zhi Yi Huo, Min Li Gong, Hong Yan Liu
This essay, on the basis of fuzzy theory, illustrates the steps of fuzzy comprehensive evaluation, introduces the factors influencing 18Cr2NiWA's cutting processing performance, gives a fuzzy evaluation of the factors, and thereby successfully solves the problems regarding these multi-factors' decision and evaluation. 0 Introduction We should consider all aspects of factors because the things have variety of attributes or are affected by many factors.
Fuzzy comprehensive evaluation means to make decision and overall evaluation of factors affected objects or phenomena, it is a mathematical tool for fuzzy synthetic decision. [1] 1 The basic steps of fuzzy comprehensive evaluation First, we should make a independent evaluation according to each factor, and then click the all factors comprehensive evaluation, which mainly comprises the following steps: (1) Analysis of the influence of elements The factor set refers to the various important factors affecting evaluation objects as a collection of elements, the commonly used U said, U =(u1,u2,…, un)
The cutting performance of the artifact material mainly depends on the material mechanics, physical properties (such as hardness, strength, ductility, toughness and thermal conductivity), the chemical composition and microstructure is the main factors affecting the mechanical, physical properties, so the machining properties of materials is not a single basic attribute, it is the comprehensive reflection of some basic properties of the material, rather than a comprehensive performance, we should use an index system and evaluation guidance not a single index. [3] The traditional methods for evaluating materials cutting performance mainly use the relative processing, such as: ① Tool life or cutting speed of the life; ② Cutting forces or cutting temperature; ③ Surface quality; ④ The difficulty level of chip breaking.
The mechanical factors affecting the cutting performance: hardness, tensile strength, elongation, impact toughness, thermal conductivity, the physical and mechanical properties of the material are shown in table 1.
Tab.1 Physical and mechanical properties of 18Cr2NiWA steel material type and grade Hardness ( HBS) tensile strength (GPa) impact toughness (MJ/mm2) thermal conductivity (W/mK) Elongation (δ%) 18Cr2NiWA 359 1.13 1.17 41.22 11 (1) Establishing factor set The physical and mechanical properties of table 1 are seen as factors lumped elements.u1 is hardness, u2 is hardness, u3 is elongation,u4 is impact toughnes,u5 is thermal conductivity, U=(u1,u2,u3,u4,u5)
Online since: November 2025
Authors: Mariy Shyogoleva, Victoria Otrosh, Oleksandr Tyshchenko, Nina Rashkevich
At elevated temperatures, the rate of hydration can change, which in turn affects the final properties of the concrete.
Table 1 shows the main factors affecting the degree of damage to structures during a fire.
configuration and layout Affects fire spread, heat accumulation and ventilation Presence of holes/cracks Accelerates the temperature spread deep into the structure External conditions (wind, air temperature) They can both increase and decrease the intensity of fire exposure Factors affecting the extent of structural damage after a fire include the temperature of the fire, the duration of the fire, the type of materials and the structural design of the building.
In general, these factors interact with each other and determine the extent of damage to structures after a fire, which in turn affects the decision to restore or reconstruct them. 3 Conclusion Fire exerts a multidirectional impact on building structures, altering their physical and mechanical properties, geometric characteristics, functional reliability, and load-bearing capacity.
Elastic properties of steel-cord rubber conveyor belt.
Online since: August 2020
Authors: Md. Shafiul Ferdous, Sobahan Mia
Shafiul Ferdous1,b 1Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna-9203, Bangladesh asmia@me.kuet.ac.bd, bmunazeer_218@yahoo.com, Keywords: Fatigue life, Critical stress, Stress concentration factor, stress intensity factor.
Introduction Carbon-carbon fiber reinforced matrix reveal advanced mechanical properties.
In the recent years, research has been working on the investigation of the mechanical characterization and physical properties.
Table 1 shows the mechanical properties of the carbon-carbon composites.
This figure shows that the mechanical properties could be improved by removing these void forms during fabrication.
Online since: February 2011
Authors: Jian Fei Sun, Zhi Liang Ning, Fu Yang Cao, Xiao Gang Diao, Shan Zhi Ren
Many factors, such as chemical composition, cooling rate, liquid treatment and heat treatment, have their influences on the microstructure[8, 13-15].
Cooling rate has its dramatic effect on the microstructure of heavy section ductile iron casting under the same conditions and hence affects the mechanical properties of castings[8, 16-17].
Chills were used to reduce the solidification time thereby improving its mechanical properties.
Samples taken from the casting were near the thermocouple used for measurement of mechanical properties.
Fig. 4 Count and size of graphite nodule at different positions of sector casting Mechanical properties The mechanical properties measured at positions 1 and 2 of the sector casting are shown in Table 2.
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