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Online since: May 2011
Authors: Jian Qiang Wei, Ming Li Cao
In order to give full play to CaCO3 whisker’s novel micro structure, excellent mechanical properties and stability, we initially applies it to advanced cement based construction materials.
Since its low cost, the mechanical properties of the composites could be greatly improved by addition of CaCO3 whisker, without increasing costs.
Li Lixia et al, [4] using soluble phosphate as control agent, prepared calcium carbonate whisker with good crystallinity and high content of aragonite phase by gas-liquid carbonation method, and further studied the factors affecting the product quality, such as amount of the soluble phosphate, carbonation temperature, inflation speed of CO2 and initial mass fraction of Ca(OH)2 slurry.
The two factors are considered as the most important factors of the crystallization of selective inducing aragonite whisker.
In our early research work, the microstructure and effect of different whiskers content on the mechanical properties of PC were investigated, which were show in Figure 8 and Table 1, respectively.
Online since: June 2012
Authors: Liang Gao, Lei Yang
However, there are many factors affecting the final deformation of the processed steel plate, which are difficult to predict.
Material Properties and Boundary Conditions Material properties, including material density, Young’s Modulus, and Poisson ratio etc, are important in the estimation of plate deformation.
However, for the given carbon-steel plate, the influence of material properties can be ignored in the research.
The steel plate has a length of 1000 mm and the material properties of carbon-steel.
DOE-Based Numerical Investigation on Factors Affecting Temperature Field during Line Heating.
Online since: October 2012
Authors: Tao Liu, Tu Zhang Ming, Guang Wei Hu
The main pavement perforamnce, such as mechanical properties, shrinkage properties and fatigue properties of cement cold-recycled mixture may not meet the requirement of high grade highways.
PAVEMENT PERFORMANCE Mechanical properties B.BABIC’S research shows that the relationships of different mechanical properties of cement stabilized materials is affected by individual composition factors, such as cement content, cement type, gradation and density, the influence of the cement type or gradation has been found to be lower than that of density.
Shrinkage properties (1) Influence factors K.P George and H.E.
Chinese research institutes have been done much about the influence of different influence factors on shrinkage properties of cement stabilized materials.
At the base of tha lastest research on cement stabilized materials, we can conclude the various factors influencing shrinkage properties of cement stabilized cold-recycled mixture: a.
Online since: July 2020
Authors: Pei Yao Li, Guo Jun Song, Zheng Gu, Li Wang, Shi Hai Zhao
The properties of polymer/OMMT nanocomposites were investigated.
The impact factors of OMMT with different layer spacing on the morphology of polymer-based nano-composites were studied.
Mechanical properties: Tensile stress and tensile modulus were measured according to standard ISO1184-1983 by using an electronic tensile tester.
Properties of PA6/OMMT Composite, J.
Structure and properties of nitrile rubber/polyvinyl chloride/organic montmorillonite nanocomposites prepared by mechanical blending, J.
Online since: May 2016
Authors: Bei Bei Sun, Fei Xue, Xin Liu, Ren Qiang Jiao, Jian Dong Chen
To study the effect of mechanical interface on vibration behavior of industrial product, it is necessary to capture vibration data and investigate modal properties.
Some typical mechanical joints must have a significant influence on the dynamics and do make change of structural response properties.
And the dynamic properties of the mechanical system such as the natural frequency, damping ratio were also obtained with the experimental measurement for specimens.
The bolted joint specimen with free boundary was shocked by transient impulse in the horizontal direction and time-domain response properties for different preload levels were recorded in experimental results.
The processed FRF data as shown in Fig.4 not only shows the relationship between excitation and response signal but also reveals structural inherent properties.
Online since: February 2016
Authors: Zuzana Murčinková, Karol Vasilko
The paper analyzes static stiffness of technological system machine tool - cutting tool - workpiece as one of factors affecting machined part accuracy.
Stiffness of technological system machine tool - cutting tool - workpiece is one of factors affecting final machined part dimensional and geometrical accuracy.
There are authors that analysed the complex mechanisms, relationships and requirements on performance of machine tools, sources of errors and they provided schemas named Machine tool structural “loop”, Machining error generating process, Factors affecting machined part accuracy, more in [1].
The schemas analyse and define the relations between individual factors.
To obtain moment of inertia of real end mill cross section, the software (Creo Parametric) and its function X Section Mass properties was used.
Online since: June 2018
Authors: Pala Srinivas Reddy, S. Santosh Kumar, T. Victor Babu
Evaluation of Mechanical Properties of GFRP Composites Reinforced with Single Wall Carbon Nano-Tubes by Immersion in Normal and Sea Water under Hydro-Static Pressure Dr.
The present work aims on evaluation of various mechanical properties of glass fiber reinforced polymer composites (GFRP) with inclusion of single walled carbon nano tube (SWCNT) in different weight fractions.
The main properties that describe a composite material are the engineering constants and the strength properties of a single unidirectional lamina that make the laminated structure.
Factors affecting water absorption include: type of plastic, additives used, temperature and length of exposure [2, 3].
[5] Alok Hegde, R S Darshan, Fayaz Mulla, Md Shoeb, M Rajanish, Tensile properties of unidirectional glass/epoxy composites at different orientations of fibres, Department of Mechanical Engineering, Dayananda Sagar Academy of Technology & Management, Bengaluru
Online since: December 2010
Authors: Yi Xia Yan, Fang Ju Zhang, Ruo Ze Xie, Xi Cheng Huang, Wen Jun Hu, Jun Mei, Yong Mei Chen
In this work we focus on the static and dynamic properties of vanadium alloy V-5Cr-5Ti over a range of temperature from RT to 1000 degree at strain rates ranged from 10-4/s~103/s.
The mechanical properties of vanadium alloy V-5Cr-5Ti depend significantly on strain rate, for instance, the yield stress, ultimate tensile strength (UTS).
The environmental temperatures affect the brittle-ductile transition.
The environmental temperatures affect the brittle-ductile transition.
Mechanical Metallurgy.
Online since: September 2013
Authors: Jia Liang Guan, Zhi Wei Wang, Li Li Zhu, Xin Qiang Ma, Xiao Hui Zhang
The experiments show that: grinding depth, electrolysis gap and wheel peripheral velocity are the main factors to affect the surface quality.
GCr15 bearing steel chemical composition, mechanical properties, ELID grinding experiment equipment and grinding conditions are respectively as shown in Tables 1 and 2.
Table 1 Chemical composition and mechanical properties of GCr15 bearing steel Material Chemical composition /% Mechanical Properties GCr15 steel C Si Mn Cr Mo σb/MPa HRC 0.95~1.05 0.15~0.35 0.25~0.45 1.04~1.65 ≤0.10 598~715 62~64 Ni Cu P S ≤0.3 ≤0.25 ≤0.025 ≤0.025   Table 2 Experiment equipment Machine tool MSG-612CNC-FA surface grinder (modification) Measuring instrument Harbin Measuring Tools Group 2205 surface roughness measuring instrument Image acquisition microscope +Panasonic WV-CP460 Wheel Copper-iron bond diamond pellets(W10) Electrolysis power Electrolysis Lapping liquid Lapping liquid High frequency DC pulse power 4 Experimental results and analysis 4.1 Experimental effects Through the analysis of the physical and chemical properties of GCr15 bearing steel and machining performance, also combined with similar material grinding experience, ELID grinding technology was finally adopted for the bearing steel.
(3) The electrolysis gap, grinding depth and wheel peripheral velocity are the main factors to affect the surface quality.
Journal of Mechanical Engineering,2000, 36( 5) :89-92 [4] GuanJiaLiang,FanJinWei,MaChunMin: ELID grinding technology in precision and ultra-precision processing and application for hard and brittle materials, Journal of Beijing university, 2001, 12
Online since: September 2007
Authors: Seung Yong Lee, Soon Cheol Kwon, Hee Hyun Lee, Cheol Woo Park
The thickness of plate did not significantly affect the compressive stress distribution around the bolt holes.
The chemical composition and mechanical properties are indicated in Table 1.
Table 1 Chemical compositions and mechanical properties of SM490B steel Chemical composition [wt%] Mechanical property C Si Mn P S σyield [MPa] σultimate [MPa] E [GPa] Elongation [%] 0.16 0.38 1.23 0.012 0.009 368.3 529.2 205.3 23.0 ` For the relaxation test, applied load on the bolts was measured using the strain gage as shown in Fig. 2 (a) for 30 days after loading.
It is, therefore, concluded that the thickness of the base metal does not significantly affect the slip of the bolt-connected plates.
Chang: Journal of Korean Society of Steel Construction, Vol. 9, No. 2 (1997), p.171 [3] S-Y Lee: Factors affecting Mechanical Behavior of High Tension Bolted Joints (Ph.D.
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