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Online since: September 2011
Authors: Qing Yuan Li
Steel stress sensors at both ends of the connecting rod reinforced with spiral steel to ensure that the measured stress sensor and has the same mechanical properties of steel.
The maximum horizontal displacement resulting in reduced parts occur, the development of horizontal displacement of the central pit the fastest, the bottom of the pile foundation horizontal displacement was less affected. the larges deformation of retaining pile is not the most dangerous place in the top of the pile.
Conclusion Pit Deformation Monitoring of the site, you can get the following conclusions: (1) affect the stability of deep foundation pit of factors, including depth, size, formation characteristics, earth pressure and groundwater.
Floor is completed, construction of the station less affected by the surrounding environment, basically does not change.
Online since: June 2011
Authors: Li Jie Yue, Jin Sheng Han, Kun Xie
Introduction Compared with the noble-metal-based metallic glasses, Cu-based bulk metallic glasses have excellent properties such as high glass forming ability, good mechanical properties and relatively low cost.
Since the successive development of Cu-based bulk metallic glasses by Inoue [1], Johnson and others in the late 90s, much effort [2~4] has been devoted to study the alloy systems, properties and engineering applications of Cu-based bulk metallic glasses.
The ultimate aim of amorphous alloys research is to develop the bulk metallic glasses with high glass forming ability and useful engineering properties.
The alloying elements significantly affected the thermal physical parameters of Cu-based metallic glasses such as crystallization temperatures, glass transition temperatures and liquidus temperatures, which further influenced glass forming ability, thermal stability, corrosion resistance and mechanical properties of metallic glasses [5, 6].
It is well known that bulk glassy alloys with high GFA and large supercooled liquid region usually obey the following three factors [7]: (1) multi-component system consisting of more than three elements, (2) significant atomic size mismatches above about 12% among the three main elements and (3) negative heats of mixing among their elements.
Online since: June 2018
Authors: Jakub Tkacz, Lucie Galvánková, Matěj Lédl, Denisa Beranová, Tomáš Opravil
One of the most important factors is the reaction temperature.
All of them agreed that during the mixing phase the essential part of ammonium is released so the mechanical properties of the final product remained unaffected.
AAC is a lightweight material with remarkable properties such as fire resistance, thermal and sound insulation and very good structural performance.
The final part of the manufacturing process is the hydrothermal treatment of the prepared green bodies, where the material gains its final properties.
Dilmore and Neufeld [16] examined the influence of the contaminated fly ash to mechanical properties and were concerned about the environmental impact of produced AAC.
Online since: August 2011
Authors: Zhao Min Li, Zu Peng Liu
Strength of foam film is one of the major factors that determine foam stability.
One of its special properties is that it can absorb water to swell several times as big as its initial size.
This special property allows it to drive oil from the deep reservoir.
(Dec. 1965), 295-300 [9] Gdanski, R.D.: “Fluid Properties and Particle Size Requirements for Effective Acid Fluid-Loss Control”, paper SPE 25849, 1993 [10] Rossen, W.R., and Wang, M.W.: “Modeling Foams for Acid Diversion”, paper SPE 56396, 1999
Miller: “Mobility of Foam in Heterogeneous Media: Flow Parallel and Perpendicular to Stratification”, paper SPE 63228, 2000 [12] Mamun C.K., Rong, J.G., Kam, S.I., et al.: “Extending Foam Technology from Improved Oil Recovery to Environmental Remediation”, paper SPE 77557, 2002 [13] Baojun Bai, Liangxiong Li,Yuzhang Liu,He Liu,Zhongguo Wang,Chunmei You,” Preformed Particle Gel for Conformance Control: Factors Affecting Its Properties and Applications”,SPE Paper 89389 presented at the 2004 SPE/DOE Symposium on Improved Oil Recovery, Tulsa,April 17-21 [14] Baojun Bai, Yuzhang Liu, J.
Online since: August 2019
Authors: Anatoliy G. Demianenko
The accompanying component is caused by the mobile inertia load or by the changeable length and they are not trivial only when this factor exists.
Panovko wrote: “The problem of dynamic acting of movable load, 100th anniversary of which we have celebrated in 1947, by today did not lost their up-to-date status, the life still set new tasks and caused by this following motion of the theory to forward” In agile XX-XXI centuries significant increasing of masses and velocities of motion sets new tasks, requires their solution, causes in its turn developing new approaches in the mechanical and mathematical modeling, new and improving of old methods of their research, that allow more comprehensively discover all quantitative and qualitative features of the kinematical and dynamical properties of the system motion.
The dynamical problem of moving variable-length objects of and objects in longitudinal motion such as threads, wires, profile rod In dependency of the analytical model of inertia properties of the elastic structure and acting movable loading we could use the following four variants of statement of the problem of influence of the movable loading on the elastic structures and buildings [5,8].
Naturally, this kinship also affects the nature of the movements of the objects being studied.
Two-wave processes in the mechanical systems, “Lybid’, Kyiv.Ukraine, (1991), 83-94
Online since: February 2011
Authors: S.M. Sapuan, Abdan Khalina, W.H. Haniffah
Sapuan 3, c 1 Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Malaysia. 2 Department of Biological and Agricultural Engineering, Universiti Putra Malaysia, 43400 UPM Serdang Selangor Malaysia 3 Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 UPM Serdang Selangor Malaysia awmh76wh@yahoo.com, bkhalina@eng.upm.edu.my, csapuan@eng.upm.edu.my Keywords: repeated water immersion, absorption, retention, kenaf/PP composite, kenaf Abstract.
Water absorption has been one of the weakness of natural fiber composite, it reduce the mechanical properties and also physical properties of the composites [2,3,4,5,6,7].
In much complex network model; factors like the size of the neck, connectivity of the network and the condition of neighboring pores determine the vapor pressure at which the pore body start drying.
Water retention of repeated immersion\drying at various cycles (A) 2\8, (B) 4/6, (C) 6/4 and (D)8/2 Summary Duration of immersion and drying does affect the amount of water retention in the composite.
Khalina: International Journal of Mechanical and Materials Engineering (IJMME), Vol. 5 (2010), p. 11
Online since: May 2004
Authors: Rui F. Silva, Mariano Pérez Amor, Manuel Belmonte, A.J.S. Fernandes, Florinda M. Costa, Juan Pou, M. Boutinguiza, F. Quintero
The performance of the Nd:YAG laser to cut thick (500 µm) free standing CVD diamond films for electronic, optical and mechanical applications, is investigated.
Introduction It is well known that diamond is very attractive for a wide range of applications because of its extreme properties.
The mentioned properties together with the developed chemical vapour deposition CVD technique to grow diamond have increased the application of diamond to many diverse technological areas, such as abrasive and cutting tools, heat sinks, high power and high speed electronic devices, optical windows, etc. [3].
Results and Discussion The interaction between the laser beam and the diamond work piece depends mainly on two set of factors: i) the laser beam characteristics, such as wavelength, pulse energy, pulse width, focal position, and frequency; ii) the work piece characteristics, such as absorptivity at the incident radiation, thermal diffusivity or the presence of impurities [6].
As the heat-affected zone is restricted, the diamond structure at the cutting surface is relatively preserved.
Online since: June 2015
Authors: Wojciech Ozgowicz, Barbara Grzegorczyk, Elżbieta Kalinowska-Ozgowicz, Aleksander Kowalski
Introduction Plastic deformation is the basic process of changing the geometrical features of solid bodies affected by external or internal forces, on which the technology of plastic working is based.
Due to the rather high interest in non-homogeneous deformation, the considerable amount of investigations has been started, dealing with the influence of those factors which are responsible for this phenomenon.
Micropores occurring in a single crystal of the alloy CuZn30 with the crystallographic orientation []: a) size distribution of micropores, b) SEM image of the pore with the results of chemical composition microanalysis at the internal surface of a micropore The microstructure of plastically deformed single crystals with the orientation [] was essentially affected by the temperature and strain rate.
Wang, The effect of cumulative large plastic strain on the structure and properties of a Cu-Zn alloy, Mat.
Grzegorczyk, The influence of the temperature of plastic deformation on the structure and mechanical properties of copper alloys CuCo2Be and CuCo1Ni1Be, Arch.
Online since: March 2019
Authors: Rudolf Kawalla, Sergey Guk, Ulrich Prahl, Maksim Zapara, Eva Augenstein
They affect the formation of the microstructure through both, the local changes of transformation temperatures and the shift of the excess carbon by cooling from the transformation front into the untransformed austenitic regions.
In fact, it is well known, that the primary segregation of alloying elements affects the temperatures of γ-α-transformation Ar3, Ar1 and Ac3, Ac1.
Khan: Role of ferrite/pearlite banded structure and segregation on mechanical properties of microalloyed hot rolled steel.
Hunkel: Analyse von Seigerungen und seigerungsbedingtem Verzug am Beispiel des Einsatzstahls 20MnCr5, HTM 67 (2012) 5, pp. 311/21 [5] Wang Bin, Hu Hong-Mei, Zhou Cui: The Method of Eliminating Banded Structure and the Effects of Banded structure on the Transverse Properties in 20G Steel, Applied Mechanics and Materials, 347-350 (2013) pp. 1171/1175 [6] S.
Howell: Factors influencing ferrite/pearlite banding and origin of large pearlite nodules in a hypoeutectoid plate steel.
Online since: August 2017
Authors: Oratai Jongprateep, Chonthicha Nueangjumnong, Jednupong Palomas
The results revealed that porosity was affected by both solids loading and sintering periods.
While pore sizes were not significantly affected by the two factors, the increase in solid loadings and sintering period could result in a narrower pore size distribution.
Jongprateep, Ba0.9 A0.1TiO3 (A= Al and Mg) Powders Synthesized by Solid State Reaction Technique and Their Dielectric Properties, Advanced Materials Research. 747 (2013) 603-606
Herliansyah, Effect of sintering temperature on mechanical and tribological properties of hydroxyapatite measured by nanoindentation and nanoscratch experiments, Ceramics International. 40(7) (2014) 9159-9164
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