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Online since: July 2014
Authors: Xiao Bao Lei, Feng Xie
The work material was zirconia block used for dental restoration which properties as shown in table 1.
The response variable is an unknown function of the former design variables, which are also known as design factors.
In this experiment, the cutting speed, feed rate, width of cut and depth of cut were chosen as design factors as mentioned earlier.
Three levels were specified for each of the factors as indicated in Table2.
“Microstructural characterization and comparative evaluation of physical, mechanical and biological properties of three ceramics for metal–ceramic restorations”, Journal of Dental materials, 2008
Online since: May 2011
Authors: Shuai Jie Guo, Bao Tian Wang, Fu Hai Zhang, Liang Chen
Cohesive sediment deposition for mutation affects estuary channel transport and brings great challenges to dredging project.
Basic physical and mechanical equations.
Experiment verification of consolidation coefficient trend Experimental soil properties.
The soil basic physical properties are listed in Table 1, and the results of particle analysis test are shown in Table 2.
Acknowledgments The authors appreciate the financial support has been provided by “Fundamental Research Funds for the Central Universities” (2009B13514) and Doctoral Fund of Education Ministry “Reaearch of high moisture content and heavy metals by curing mechanical properties” (2010 009411 0002).
Online since: August 2013
Authors: Yan Hua She
Building up the 3D numerical analysis and computing model, force properties of buried pipelines under vibration loads induced by bridge pile foundation construction were researched, to evaluate and control the influence of construction vibration on adjacent buried pipeline.
Introduction With the large number of highway, railway and other infrastructure construction, impact loads caused by bridge pile foundation construction gave rise to inevitable disturbance to the surrounding adjacent buried pipeline, affecting the normal use and safety operation of buried pipeline adversely.
In recent years, it has been paid more attention to the third party interference of buried pipeline, such as response under the action of dynamic blasting vibration [1,2], rockfall impact loading [3,4], and traffic loads[5].At present, like the mechanical impact problems of the dynamic compaction and punching pile construction, it focused more on the study of the dynamic characteristics of soil, and paid less attention to the research on vibration response of underground structures, such as buried pipelines.
It mainly considered variation factors of pipeline buried depth, source location, pipeline and vibration level spacing effecting on stress, displacement and the vibration velocity of the buried pipeline.
Tab.3 Pipeline response values along level distance It can be seen from Tab.4, the factor of level distance affecting pipeline was significantly higher than others, especially when impacting close to the buried pipeline.
Online since: March 2004
Authors: Young Won Chang, Tae Kwon Ha, Sang Ho Ahn, Hwan Jin Sung
Introduction It is well known that the existence of pores can act as crack initiation sites causing stress concentration, reduce the load bearing area, and detriment static/dynamic mechanical properties of the sintered part
[1, 2] Mechanical properties of porous materials with pores inside are strongly dependent on the amount, size, distribution, and shape of pores.
There have been a large numbers of researches on the effect of porosity on the mechanical properties of sintered parts inevitably containing pore for a long time. [3~6] The majority of the researches were, however, focused on the parts made by conventional powder metallurgy mainly consisting of pressing and sintering, in which the systematic control of pore shape and microstructure is inherently difficult.
(6) It should be noted in the present model that the initial stacking structure, i.e. the initial porosity �i affects the strength of sintered parts even with the same porosity.
Haynes, The Mechanical Bchaviour of Sintered of Sintered Metals, (Freund Pub., London, UK 1981)
Online since: December 2006
Authors: Yong Kang Zhang, Tao Ge, De Jun Kong, Jin Zhon Lu, Ai Xin Feng
Study of Interfacial Bonding Strength of Coat based on XRD Dejun Kong1,a ,Yongkang Zhang1,2,b , Aixin Feng 1 , Jinzhon Lu 1 and Tao Ge1 1 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China 2 School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China a kong-dejun@163.com, bykzhang@ujs.edu.cn Keywords: Interfacial bonding strength, X-ray diffraction (XRD), Coat, Residual stress Abstract.
Introduction Coat technology is one of the important means to increase material surface performances, such as wearability, corrosion resistance, thermal resistance, fatigue resistance, radiation resistance and special properties of light, heat and electricity [1-3].
Residual stress is a widespread phenomenon during coat process, and is one of the main factors which effect bonding strength between coat and matrix [4].
Its hardness is above HRC65 after quenching and annealing of removing residual stress, TiN coat is deposited on ceramic cutting tool by PVD (Physical vapor deposition), and their mechanical properties are shown as Table 1 [7-8].
Table 1 Mechanical properties of Si3N4 substrate and TiN coat Material Expansion coefficient [K-1] Elasticity module [GPa] Density [g/cm 3] Si3N4 3.35×10-6 300 3.21 TiN 8.0×10-6 450 5.44 Test Device.
Online since: May 2011
Authors: Bin Wang
The results showed that the eccentricity ratios and slenderness ratios are the primary factors to influence the load-bearing capacity of CFSST columns, with the increase of eccentricity ratios and slenderness ratios, the limit load-bearing capacity reduced gradually.
Material Properties.
It can be found that, slenderness ratios have big influence on specimen elastic stiffness, and they do affect the load-bearing capacity and ductility of the columns to some extent.
The eccentricity ratios and slenderness ratios are the primary factors to influence the load-bearing capacity of composite columns, with the increase of eccentricity ratios and slenderness ratios, the limit load capacity reduced gradually. 3.
Tao: Mechanical research on key points of concrete-filled square steel tube members, the dissertation submitted to Harbin Institute of Technology for degree of Doctor of Philosophy 2001
Online since: June 2017
Authors: D.V. Shchitov, E.Yu. Lykova, K.V. Katerinin, P.A. Sidyakin, A.A. Voytyuk, E.V. Moskvicheva
Besides the desired properties of the obtained sorption material (mechanical strength, porosity, specific surface area, the chemical nature of the surface) technological factors and characteristics of the cleaning solution affect the sorption.
For this reason, the determination of physico-chemical properties of the newsorption material is necessary.
The equilibrium concentration of zinc ion in solution, mg/l A systematic analysis showed (Fig. 1) that an increase in the specific surface area of the sorption material increases its adsorption properties.
Effect of temperature on the adsorption capacity of solutions sorption material The work investigated the effect of pH on the properties of the resulting composite.
Kuzmina, Study of links between physical and chemical properties of industrial wastewater and methods of cleaning, J.
Online since: November 2012
Authors: Kai Qi, Wei Xiong Wang, Xin Hua Wang, Ai Hua Jiang, Bai Qing Liu
Since there is a considerable scatter in the data, a reduction factor is often applied to the S-N curves to provide conservative values for the design of components.
Of course, environmental conditions, load history, statistical aspects, and safety factors must be incorporated in this methodology for remaining fatigue life assessment.
After idealizing the detected defection, relevant stress intensity factor will be gained via calculation or fatigue handbook.
Furthermore, material properties such as young modulus, tensile strength, yield strength and fracture tough and so on can be obtained via tests.
Transactions of the American Society of Mechanical Engineers, (1963), p. 528-534
Online since: November 2016
Authors: Mahmoud M. Bubakir, Yu Mei Ding, Hao Yi Li, Wan Lin He, Wei Min Yang
Thus It is very important to find low cost, scalable fabricated, high sorption capacity, high selectivity, excellent reusability, optimum mechanical properties, and environment friendly materials that could meet all the requirements needed to be used as an efficient sorbent to clean up spills and recovering the oil .
The physical properties of oil, such as density, surface tension, and viscosity, could also influence the sorption capacity and the retention behavior as well.
The physical properties of the oil at 25 ± 1 °C and a relative humidity (RH) of 25 % are given in Table 1.
Results showed that change in temperature and oil concentration were important factors in determining the sorption capacity of the fibers.
Study of sorption properties and comparison with other cotton fiber-based sorbents.
Online since: April 2014
Authors: Mei Jiang Yan, Yang Zhang
If we take the safety factor of 1.5, the maximum allowable stress will be 237MPa.
Material properties was defined as steel, then the modeling is shown in Fig.8.[3] B T Fig.8 ADAMS modeling Kinetic Analysis According to the computational loadings of the catching-mechanism, we defined the related loadings and steps in ADAMS.
Optimization of Mechanical Design[M].Peking: Machinery Industry Press,2005
Senior Mechanical Design Application of ANSYS[M].
[3] Yaodong Gao.50 Mechanical engineering applications of ANSYS[M].Peking:Electronic Industry Press,2011.
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