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Online since: November 2025
Authors: Artem Maiboroda, Maryna Chyrkina-Kharlamovа, Dmytro Zhurbynskyi, Dmytro Tregubov
It is believed that the supramolecular structure is responsible for physical properties, the microstructure for mechanical properties, and the macrostructure for the coke thermal stability.
The coke molecular and supramolecular structure organization and the impurities presence determine its properties as a semiconductor, which allows us to evaluate coke some properties based on its resistivity.
Both factors contribute to a decrease in the lump coke electrical resistivity.
The electrical resistivity of a coke heap depends on same parameters as for a coke piece, but additionally factors such as fractional composition, contact density between individual granules, and the contact surface area appear.
Emen, Formation of fire dretardant properties in elastic silica coatings for textile materials.
Online since: January 2012
Authors: Jun Xiong Lin, Lan Wang, Jun Li
At the same time, the breaking tenacity of PANI/PET composite fabric was better than that of polyester fabric 1 Introduction Polyester fabric had high intensity, good elasticity and rigid mechanical properties.
It might directly affect the production of polyester textile processing and application even could cause serious static disasters [1].
In this paper, liquid phase in-situ polymerization was used to produce the PANI /PET composite fabric with good anti-static nature and the reaction of anti-static property on PANI/PET composite fabric was explored.
At the same time, the surface morphology, chemical structure and mechanical properties of PANI/PET composite fabric were studied by means of modern testing.
If the reaction temperature was exorbitant, it may not only affect the structure of polymer chain aniline to generate "bookends" orderly, but also make the PANI/PET compound fabric on polyaniline macromolecular chain of big π key damage, leading to the antistatic performance decline.
Online since: September 2013
Authors: Jian Xiong, Bin Chu, Ming Bo Wang, Xiao Li Li, Zhen Ding She
This study shows a potentially effective method to improve the mechanical property and the biological activity of calcium phosphate cement. 1.Introduction Bone defects and damage due to aging, accident and disease, have long been challenging surgeons and affecting human health and quality of life.
The improvement of mechanical properties with the amount of curing liquid and Sr-HA fibers was be researched.
The amount of curing liquid is not only effect to the solidification time, but also to the mechanical properties of materials.
The results show that the mechanical properties of CPC could be improved by adding Sr-HA fibers.
Simon Jr, Fast setting calcium phosphate–chitosan scaffold: mechanical properties and biocompatibility.
Online since: October 2010
Authors: Yong Jin Guo, Ping Zhu, Jian Hui Niu
Material Properties Both of the sheet materials used in the study possess a thickness of 1.37mm and a nominal yielding strength of 350MPa.
The tested material properties are summarized in Table 1.
Table 1 Quasi-static mechanical properties of HSLA340 and DP590 Material Direction y[MPa] u [MPa] n r HSLA340 0° 354.90 442.17 0.129 0.93 45° 355.08 437.84 0.129 1.12 90° 364.54 441.76 0.130 1.04 DP590 0° 45° 90° 364.48 357.36 358.03 660.45 661.10 651.82 0.158 0.158 0.154 1.07 1.16 0.85 *Where y, u and n are yield strength, tensile strength and strain-hardening exponent, respectively.
It seems that the non-uniform distribution of thickness and material property induced by stamping process have little influence on the collapse initiation of HSLA340 LBHF stamped component, however it does affect the subsequent deformation mode being a perturbation.
It is found that residual forming data are significant factors affecting structure crash performance which can result in different crash behaviors for different forming conditions.
Online since: November 2012
Authors: Le Yang, Hai You Peng, Jian Guo Yang, Meng Wu, Mo Lin Zhou
The substance construction, rock mass structure and mechanical properties of Badong formation are very complex, especially the developmental weak section can be seen everywhere, which make Fengjie become one of the regions where the geological disasters grow intensely.
Analysis of influence factors Tectonism.
The different proportion of the three minerals decides the difference of physical, chemical and mechanical properties of rock[16].
So along the profile, the chemical composition changes little; while the physical mechanical properties changes obviously.
Meanwhile it may lead the mud lime rocks to corrode and easily fracture, make their mechanical properties reduce.
Online since: June 2013
Authors: Dong Xiang, Ning Xie, Nan Liu, Ying Ren, Peng Mou
Fatigue problems about large sized structure components ,such as bridge crane girder , has always been the bottleneck of mechanical products lightweight, reliability, security.
Fatigue failure mechanism is very complex about bridge crane for a long period of alternating loads, because a lot of factors that affect the fatigue behavior[1,2,3].
The actual processing of welding influencing factors were ignored in the above analysis, then the local details of welded joint fatigue problem will be analyze the fatigue properties focus on the most dangerous position.
Fig5 Dangerous position in mid-span section Fig6 Dangerous position in 3D model Combined with welding process technology characteristics of their own technology to retain the weld heat affected zone and the consistency of the welding process and the process parameters of the actual bridge crane, characterized in figure 7 shows, determine the welded joints simplifying principles are as follows: a.
Online since: May 2014
Authors: Fei Li, Wei Dong Miao, Wei Zeng, Xiao Jun Zheng
Therefore, equipment performance is affected by the environment.
Typically, equipment operating environment refers to all contextual factors which equipments exist and run, including the natural environment, political environment, technological, environmental and economic environment.
As is shown in Figure 1, this include the external environment (equipment operating environment) and the background--between the internal and external factors in the complex engineering equipment system, the interaction relationship between the factors of engineering equipment,then establish a corresponding system model ,which make optimal change design of the system structure.
To improve the level of environmental adaptability of armor, we need analyze and evaluate some environmental factors armored vehicles encountered, including meteorological environment, mechanical environment, geography, etc.
As described above, changes in vehicle performance may result in a deterioration of other properties, which is a conflict in armor performance demand indicators, especially for the design of local change in armored vehicles, also limited by the existing structures.
Online since: March 2006
Authors: Samuel Sánchez, E. Velasco, J.L. Cavazos, Patricia del C. Zambrano
The mold filling depends on many factors whose exact effect is still unknown.
Fluidity is affected by some factors [4], such as: a) Fluidity increases with overheating, due to viscosity reduction and solidification delay.
High levels of titanium can give rise to the formation of intermetallic particles that are detrimental to mechanical properties.
Hatch: Aluminum: Properties and Physical Metallurgy (ASM International, Metals Park, OH, USA 1984)
Taylor: Factors Affecting the Fluidity of Metals (Ed.
Online since: August 2011
Authors: Jing Wang, Zhan Fang Ge, Ming Wu, Ai Jiu Chen
The order of the factors that affect the chloride ion diffusion coefficient of recycled concrete is fly ash admixture→mixing amount of the air entraining and water-reducing agent→admixture of recycled coarse aggregate→polypropylene fibre admixture, which provides a basis for the application of recycled concrete engineering in the environment which is affected by chlorine salt in the north frigid area .
The packing density is 550 kg/m3~800 kg/m3.In the experiment, the binder is P.O32.5 cement; sand is the ordinary river sand with fineness modulus of 290; Natural coarse aggregate is grinded rubbles of continuous grade; Recycled coarse aggregate is collected from abandoned reinforced concrete beam that was broken and processed; Polypropylene fiber presents in bunch of monofilament, with excellent self-dispersion property; Using SK-3 air-entraining and water-reducing agent which produced by China's water science research institute; The water used regarding to mix-proportion and maintenance is tap water of Zhengzhou; The basic properties of coarse aggregate are in the table 2.
As a result the internal structure of concrete can be improved and the work performance, mechanical properties and durability of concrete can be perfected enormously.
In this experiment the design strength of fly ash recycled concrete is C30, instead of cement admixture of fly ash for 30%, Super generation coefficient is 1.5, the mix proportion and the property of mixture in table 3.
Experimental Investigation on Properties of Concrete with Reclaimed Coarse Aggregate [J].
Online since: October 2014
Authors: Mohd Fareez Edzuan bin Abdullah, Noor Aliah Binti Abdul Majid, Mohd Hisyamuddin bin Sulaiman
A number of factors can affect the NOx emissions regarding to the use of biofuel.
Materials and Methods Fuel Properties.
The reference fuel properties of POME, CoOME and CaOME are shown in table 1 [6].
Physical and chemical properties of various methyl esters of fatty acids [6].
Cheralathan, Influence of fuel properties and composition on NOx emissions from biodiesel, Renewable and Sustainable Energy Reviews 16 (2012) 3702-3710
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