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Online since: August 2013
Authors: Shuo Xing, Yun Xia Wang
The edge load correction factor is introduced, and its scope is 1.0 ~ 1.2.
The BP neural network is a relatively mature and is widely applied now, and this model can fully reflect the effect the parameters of pile, the displacement rate, the physical and mechanical properties of soil and mattress layer thickness and construction technology as well as the interaction among various factors have on the bearing capacity of CFG pile composite foundation, and the various effect of composite foundation.
The traditional bearing capacity calculation formula and formal of CFG pile composite foundation, do not consider physical and mechanical properties of soil between piles after reinforcement.
Rui-jie Jia [19] (2006) found that the physical and mechanical properties of soil between piles can be improved after the soil was reinforced by CFG pile, and it will inevitably affect the bearing capacity of single pile and composite foundation.
It can consider many factors influencing the performances of the pile at the same time, such as the nonlinear of soil, the soil inhomogeneity, anisotropy, the consolidation and creep and so on.
Online since: February 2011
Authors: Zheng Liu, Xiao Mei Liu
Fractal Characteristics of Microstructure in Semisolid A356 Alloy Zheng Liua, Xiao-mei Liub Faculty of Mechanical and Electronic Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China a liukk66@163.com, b liuxm66@163.com Keywords:semisolid; fractal; morphology; primary grain; A356 alloy Abstract.
The research has indicated that one of the structural characteristics in semisolid alloy with good forming properties has certain amount of particle-like primary grain in the alloy [1].
Discussion During formation and growth of semisolid microstructure, because of affecting by preparing condition and external physical field (for example pouring temperature, stirring power, stirring time, isothermal holding, ultrasonic or mechanical disturbance, addition of modifier and so on), there will be change on the morphology, size and structure for primary grain, at the same time, there is other change, included growth and migration of the grain, even fuse and separation of the grain to make morphology of the grain change.
There are the numerous complicated factors affecting the morphology during evolution of the primary grain morphology in semisolid A356 alloy, in which they are nonlinear in essence.
Online since: October 2007
Authors: Kenji Higashi, Sachio Oki, Sung Wook Chung, Masato Tsujikawa, Hong Qiu Qu
However, as is well known, welded joints can exhibit poor fatigue properties.
The heat of friction and plastic flow from the rotating tool produce significant microstructural changes, which lead to a local variation in the mechanical properties of the weld.
This paper determines fatigue properties of FSW of the Al5083-O alloy with FSW condition with tool rotation: 500 rpm-100 mm/min, 800 rpm-100 mm/min and 800 rpm-200 mm/min, including fatigue life and fatigue characteristic values.
We conducted tensile test and fatigue test to study the factor of fatigue strength of Al5083-O alloy FSW joints.
References [1] Caizhi Zhou, Xinqi Yang and Gouhong Luan: Fatigue properties of friction stir welds in Al 5083 alloy.
Online since: August 2011
Authors: Ying Li Gao, Ling Cheng
This paper studied the CO2 sequestration effect and the mechanical properties of the pure cement, the pure steel slag, and the cement based composite cementitious materials containing steel slag.
And, CO2 is the primary compound in the automobile exhaust, accounting for 12%-15% of it, and it is the main factor to cause global warming.
On this basis, the mechanical properties was tested.
All these made the CO2 sequestration property of cement can not be realized in the maximal degree.
(b) The porosity affects CO2 sequestration property.
Online since: May 2014
Authors: Hui Wang, Jiu Peng Zhang
In order to prevent the reflective cracking, three main factors are taken into account. (1)The SBS modified asphalt used in the wearing course of AC-13 is with the amount of 5.5% SBS.
The asphalt concrete with high addition SBS modified asphalt is of good high temperature performance, good low temperature performance and good fatigue property. (2)Open-graded large-stone asphalt mixes LSAM-25 is of large air voids.
Mechanical response and life expectancy analysis of asphalt overlay Mechanical Response of Asphalt Overlay Based on the temperature parameter of Xia-Fen expressway and Eq.1, we gets the temperature stress of asphalt overlay (superposition of temperature stress caused by shrinking constraint of the surface course, contraction deformation of the base and warping of the base)
The Influence of Disengaging to Life Expectancy of the Asphalt Overlay One of the influence factors that affect the load stress of asphalt overlay is disengaging under the old cement concrete slabs, which can express by λk (the ratio of foundation strength under the corner of the slabs to the middle of the slabs).
Furthermore the factors that influence the reflective cracks are traffic volume and heavy load.
Online since: July 2022
Authors: Nicolas Montes, Ivan Peinado-Asensi, E. García
The stamping process is made up of more than 40 variables that directly or indirectly affect the process.
Methodology In the world of stamping, the working parameters for the production of the different car body parts are obtained through simulation, where from some inputs such as properties of the material to be used, geometry, type of lubrication, etc., we can obtain the outputs to be configured in the press such as the stamping speed, materials, tonnage, etc., to produce parts within quality margins.
This can be due to different factors such as die wear [6], change in the properties of the material in the sheets obtained from the end of the coil or even due to a bad working condition of the press.
In short, tonnage is a highly sensitive variable to any change in the process parameters that can affect the machine health and the quality of the part.
Towards Real Time Predictive System for Mechanical Stamping Presses to Assure Correct Slide Parallelism. 
Online since: October 2012
Authors: Ming Zhang, Xu Dong Wang, Ping Liu, Hu Yuan Zhang, Qing Lin Guo, Lin Yi Zhao
The physical and mechanical properties and building technology of the earth determines the vulnerability of the earthen architecture sites.
The domestic scholars have conducted the systematic research on the classification and mechanism of diseases of the cultural relics. [5-6] However, many existing studies are mainly in the qualitative description without the scientific quantitative research data, such as the issues concerning the control of the threshold level of the factors affecting the cause and development of diseases of the sites, the prediction of the development mode of diseases under certain conditions, the scientific explanation of the cause mechanism of different types of diseases, etc.
For the earthen architecture sites, the properties of the construction materials have been confirmed, so it can only start from the structural form.
However, the relevant natural factors require the scientific and systematic researches through the technical means.
In the disease mechanism research of the earthen architecture sites, the current researches focus on the soil-water interaction, water and salt transport, thermodynamic properties, and wind erosion mechanism.
Online since: August 2013
Authors: Yang Liu, Hai Ying Wen, Gang Yang
The ideal axis compression member occurs at the branch point instability, where it mutates from one equilibrium state to another equilibrium state, and with mechanical properties having different fundamental changes.
Figure.1 The facade of the main bridge The Establishment of the Modal .The unit type and material properties are shown in Table.1.
Table.1 The unit type and material properties Component Grade Unit type Elastic modulus [MPa] Poisson's ratio Density [kg/m3] girder C55 Solid65 3.55 × 104 0.2 2,600 pylon C50 Solid65 3.45 × 104 0.2 2,600 pre-stressed steel Φs15.2 Link10 1.95 × 105 0.3 7,850 Adopt fixed constraint at the bottom of the piers.
The security factor of the single free-standing tower is 42.3.The security factors of two conditions are greater than 4.
(2) The security factors of the bridge and the single free-standing tower are greater than 4, They meet the requirement of related specification.
Online since: March 2020
Authors: Shival Patel, Vishvesh Badheka, Kishan Fuse, Khushboo Gangvekar
The experimental layout of L9 orthogonal array for the process parameters & tensile properties measured in terms of selected response variables is shown in Table 2.
Rejecting null hypothesis for feed rate suggest that feed rate is the most significant process parameter affecting multiple response characteristics.
ANOVA results considering grey relational grade as factor indicated that feed rate is the most significant process parameter affecting multiple response characteristics.
Kailas, Two-pass friction stir welding of aluminum alloy to titanium alloy: A simultaneous improvement in mechanical properties.
Pal, Fuzzy assisted grey Taguchi approach for optimization of multiple weld quality properties in friction stir welding process.
Online since: February 2014
Authors: Yang Tao Xu, Tian Dong Xia, Wan Ping Wang, Gui Lan Zhang, Bao Lin Jia
School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China Email:lanzhouxuyt@163.com Key words:Graphite;Molten Solar Salt;Hot corrosion;Graphitization degree Abstract: Solar Salt is the best hot transfer medium molten salt of solar thermal power generation.In order to study the hot corrosion behavior of four graphite is in the molten Solar Salt.The graphite immersed equipped with molten salt crucible placed in a muffle furnace,each period of time remove the sample and weight the weight gain until the sample is completely destroyed.The destruction forming of graphite is analyzed by XRD, SEM and OP.The study found that the order of hot resistant corrosion of molten Solar Salt of four graphite materials are the fine structuregraphite,isostatic graphite,9# graphite and cold pressing graphite.The principal factors can affect hot corrosion resistant of graphite is the graphitization degree.
Molten salt mixture properties in RELAP5 code for thermodynamic solar applications[J].
The preparation and properties of multi-component molten salts[J].
Effect of graphitization degree on the mechanical properties of C/C composites[J].Journal of Central South University of Technology (Natural Science),.2001,32(3):289-293
Effect of graphitization degree on properties of self baking carbon block[J].
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