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Online since: July 2011
Authors: Kai Zhang, Xiao Xiong Zha
Mechanical method is used when making foaming agent into foams.
The additive of Mukah affect greatly on the stability of the foam, and the crash of the foam cause collapse, Showing lower performance than Styrene— butadiene latex.
The mechanical behaviors and failure mode have been discussed.
Composition is the primary factor to influence foam concrete strength, mainly including the type of gelling materials, the foaming agent and activate micro-aggregates. 3.
[2] Wenjuan Song, Qu Shenghua, Using waste material prepare cement mortar mechanical properties of impedance spectroscopy[J]: Fly Ash Vol. 5(2007), p. 14-18,in Chinese
Online since: November 2016
Authors: Matteo Villa, Michael Reich, John Hald, Daniel Apel, Frank Nießen, Olaf Keßler, Marcel A.J. Somers
Lyngby, Denmark 2Technical University of Denmark, Department of Mechanical Engineering, 2800 Kgs.
After austenitization the steel grade consists of lath martensite and obtains the above mentioned combination of mechanical properties, in particular the yield strength and toughness, by a lamellar structure of reversed austenite forming upon inter-critical annealing.
The volume fractions of austenite and martensite were determined with the direct comparison method [9]: R=mhkl∙F0hkl2∙e-2M∙n-2∙µE-1∙hcE3 , (3) fγ=1-fα'= 1qj=1qIγjRγj/1pj=1pIα'jRα'j+1qj=1qIγjRγj (4) where R is the theoretical integrated intensity, I is the measured integrated intensity, m(hkl) is the multiplicity factor, F0hkl2 is the structure factor, e-2M is the Debye-Waller factor, n is the unit cell volume, µE-1 is the energy-dependent absorption factor, p and q are the number of peaks for martensite and austenite, and f is the volume fraction.
The Debye-Waller factors were calculated according to [10] with a constant Debye-Waller parameter.
The effect of surface martensite would not significantly affect the dilatometry or calorimetry investigations, since these methods measure bulk-properties on thicker specimens, while XRD is relatively surface sensitive.
Online since: June 2007
Authors: C.A. Chidolue, B.A. Chidolue, S.N. Umenwaliri
Bleeding or leakage between the mould and baseplate may lead to loss of water which would affect the water-cement ratio of the cubes and hence their strength.
Also, weather or outdoor exposure may affect the actual structure whereas the cube specimen may be under uncontrolled laboratory conditions.
The method of non-destructive testing, which estimates the strength of concrete without destroying the structure or affecting its function, is the most suitable and widely used.
This method includes techniques which measure either the strength property of concrete or a physical or mechanical property which can be correlated to strength.
BS4408:Part5 [6] gave some tables of correction factors by which the measured velocities should be multiplied to obtain the effective velocity in concrete alone if the axis of reinforcing bars are perpendicular to the direction of propergation.When the axis of reinforcing bar is parallel to the direction of propagation BS4408[6] also has a formula by which the pulse velocity in the concrete alone may be evaluated Chung [5] showed that when a pulse is in the direction of the axis of reinforcing bars through a steel/concrete medium, the true velocity is less than the theoretical value and is influenced by the bar diameter.
Online since: October 2014
Authors: Xiu Bo Luo, De Min Xu, Xiao Mei Hu
The particles and moisture are the main factors causing the quality change of hydraulic oil and lubricating oil.
Oil quality is also a factor to reflect the state of the machine running.
Figure 4 Oil particle size line detector Most of these impurities are iron sand and the like, and the mechanical impurities in the additives.
Typically, the mechanical impurities in the lubricating base oil are controlled to 0.005% or less.
The greatest impact on particular matter pollution is lubricating properties.
Online since: May 2011
Authors: Ji Ren Tang, Ke Hu, Wen Feng Zhang, Yi Yu Lu, Zhao Long Ge
On the other hand, the porosity of rock is another main factor of rock breakage with high pressure cavitating water jets.
In this paper, influencing factors of rock-breaking performance under high-pressure cavitating water jets are simplified as two aspects: the properties of rock itself and the parameter conditions of cavitating water jets.
(4) Besides erosion conditions (pump pressure, confining pressure, erosion time) that affect rock breaking under high-pressure cavitating water jets, rock properties are important factors as well.
The Japan Society of Mechanical Engineers International Journal Vol. 38-1 (1995), p.31-37 [5] Soyama H,Tokumitsu K,Nishida M.
Chinese Journal of Mechanical Engineering Vol. 33-3 (1997), p. 44-47 (In Chinese) [10] Wenying XIANG, Xiaohong LI and Yiyu LU.
Online since: March 2022
Authors: John Ryan C. Dizon, Ulysses B. Ante, Arvin Oliver S. Ng, Joseph Alfred V. Garcia, Fred P. Liza, Michael B. De Leon, Madelene Velasco Villablanca, Rigoberto Advincula
Factors, such as radiation, extreme heat cycles, and low pressure are the common environmental conditions a CubeSat will encounter in space.
The comparisons in Table 2 are based on specific material properties using a standard test piece.
In addition, to control the desired mechanical properties and reduce defects induced during printing, post-processing such as heat treatment, stress relief, solution annealing, and ageing are considered.
These thermoplastics offer remarkable chemical resistance and excellent mechanical properties even at elevated temperatures.
This process is necessary to maintain its mechanical strength and modify its mechanical properties, depending on the application, by varying the time and temperature in the heat treatment process.
Online since: August 2025
Authors: Nisar Ali, Qazi Shakeel Ahmad, Majid Khan, Amir Khesro, H. Alrobei
Therefore, by reducing the density of dangling bonds (dislocations), it is possible to improve VOC and fill factors.
It was noted that the capping agent directly affects the surface of NPs, having a significant impact on the oriented attachment process and the surface-associated properties of nanoparticles.
PL spectra of CdZnS QDs as synthesize and synthesized with capping agents I-V characteristics The I-V properties can be affected in a variety of ways depending on the capping agent selected.
These groups can modify the charge transport properties or enable particular interactions with other materials in a device to affect the I-V behavior [33].
The I-V properties of CdZnS QDs can be affected in a number of ways by the addition of a capping chemical to their surface.
Online since: August 2011
Authors: Gui Qiang Li, Chao Nan Yin, Shou De Wang, Ling Chao Lu
This new-type cement shows excellent mechanics properties.
The cement possesses the properties of Portland cement as well as that of rapid hydration and hardening, higher early age strength and smaller volume shrinkage of hardening [4-6].
Sintering temperature, sintering time and adding contents of C1.5Sr2.5A3 mineral were taken as the influencing factors of the orthogonal test [10].
Orthogonal test of the compressive strength was carried out in order to analyze the effect of various factors on the compressive strength.
Free CaO and Mechanical Properties Analysis.
Online since: May 2014
Authors: Guo Qiang Liu, Jie Liu, Xiao Lin Guo, Yan Zhao
The soils are the precious property for the development of agriculture and forestry.
Terramechanics is a subject about the mechanic interaction between the terrain and the vehicle, in which the two sides are viewed as a system to research the mechanical properties of the ground and all kinds of relationship between the ground and the vehicle, so as to provide theoretical basis for the reasonable design of vehicle.
The properties of the terramechanics are one of the most important factors that affect the vehicle’s trafficability.
Such as Qizhou Fan established a mechanical model of P-K.
These conducted models and analysis methods will help to understand the mechanical properties of the soft soil and the interaction of the screw propeller and the ground.
Online since: January 2022
Authors: Mehmet Alper Sofuoğlu, Nil Aras, Haydar Aras, Nuri Şişman
Factors resulting from health-ecological problems as well as cultural, social and economic changes and differences in Turkey were included in the model to obtain more realistic results.
The reliability of these predictions is one of the significant factors affecting the effectiveness of countries' energy policies.
ANN has many attractive theoretic properties to detect nonlinear effects and interactions.
In addition to variables used in the literature, factors resulting from health and ecological problems as well as cultural, social and economic changes and differences in Turkey were included in the model to obtain more realistic results.
Karacan, Investigation of factors affecting demand for electricity consumption with multiple regression method, Selçuk University Journal of Engineering, Science and Technology, 4(3) (2016) 182-195 [27] F.Yüzük, Turkey energy demand forecasting with multiple regression analysis and artificial neural networks.
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