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Online since: March 2013
Authors: Chun Yuan Liu, Yu Liu, Xiao Han
Building Condition Assessment According to the “Code for design of building foundation” [10], due to the factors, such as uneven foundation, large load difference and body complexity, that cause the deformation of foundation, the masonry load-bearing structure should control its local slant.
New material mechanics model can be built with consideration of the material properties of mortar and brick as well as their interaction separately.
Considering adjustments to mechanical properties of homogenized masonry materials, a whole floor model is built based on elastic theory.
Taking the construction process in that time into account, the component, connections and material properties have great differences from current norms.
To simulate the process that settlement affects the building from completion to this day, the constraint condition is established.
Online since: August 2016
Authors: Andrei Lucian Crăciun, Camelia Pinca-Bretotean
Weight, manufacturing process ability and cost are also important factors those are need to be considered.
The properties examined are: porosity, density and hardness test.
Samples obtained will be tested in terms of mechanical properties and in terms metallographic structure , which is the subject of other papers .
During the mixing of ingredients it was observed that the factors that affect a homogenous mixture are the speed of mixing, the amount of the phenolic resin.
It can be concluded that CP2 and CP3 showed almost similar properties from the four formulations and it could be utilise in the fabrication of brake disc.
Online since: March 2014
Authors: A.J. McEvily, Kenichi Masuda, Sotomi Ishihara, Yuya Sugai
The chemical compositions and mechanical properties of these alloys are given in Tables 1 and 2, respectively.
Mechanical Properties Yield Strength, MPa Tensile Strength,MPa % Elongation Al 6061-T6 287 315 16.4 JIS S25C 269 520 31.0 Previous Test Results [6] A.
Then, the crack opening stress intensity factors Kops, Kopi and the values of a were determined for those materials.
Therefore, it is important to understand that both the work-hardening coefficient and Young’s modulus are key factors, determining the crack closure characteristics.
(4) Both the Young’s modulus and work-hardening coefficient are key factors for determining the crack closure characteristics.
Online since: September 2016
Authors: Vikas V. Chaudhari, D.M. Kulkarni, P.L. Ramkumar
In such applications, fracture properties are considered to be critical from the quality characterization point of view.
Significant contribution in the development of rotational moulding process and product was made by Crawford [5-7] in knowing the powder properties and its structure.
In such applications, fracture properties are considered to be critical from the quality characterization point of view.
According to ASTM D6068 (2012), J integral is given by Eq. 1 J = Je+Jp (1) Here Je & Jp are the elastic and plastic components of total J value given by the Eq. 2 Je = ηe Ue/ B(W-a) Jp = ηp Up/ B(W-a) (2) Were Ue & Up are the elastic and plastic components of the total energy. ηe & ηp are their corresponding work factors.
This variation clearly implies that the cooling conditions are significantly affecting the final product quality in rotational moulding process.
Online since: November 2006
Authors: Wei Hua Zhang, Yong Xiang Zhao, Bing Yang
In addition, material micro-structural barrier related parameter is introduced to characterize the significant micro-structural affecting effects.
Chemical composition of the base metal and the electrodes for weld metal and monotonic mechanical properties see reference [5].
The cracks in these zones might affect the DESFC behaviour.
energy utilized factor in the MSC regime; G2, K2, and � 2 are initial growth rate, cyclic strain energy strengthening factor, and cyclic strain energy utilized factor in the PSC regime; aT is half DESFC length corresponding to the maximum micro-structural barrier.
And a material micro-structural barrier related parameter is introduced to characterize the significant micro-structural affecting effects.
Online since: November 2011
Authors: Jia Sheng Guo, Chao Kui Qin, Fei Ma, Chao Tong
Introduction In the past decade, driven by environmental and economic factors, the rapid development of gas engine technology such as closed-loop feedback control and stoichiometric and lean burn engines and other advanced technologies are widely used.
Klimstra [2] examined the relationships between gas composition and mixture properties and reported on the effect on stoichiometric air-fuel ratio, heating value and the Wobbe Index, and knock sensitivity.
When using gas as a fuel the following fuel properties are important in relation to engine performance: · Density · Heating value, i.e. the Wobbe Index · The stoichiometric air-fuel ratio · Knock resistance.
These gas properties are closely linked to the composition of the gas.
It is minimally affected by changes in gas composition if the air/fuel ratio is constant.
Online since: November 2014
Authors: De Kun Yue, Yong Min Jiang
Although the results of the movement only require that the geometric accuracy of the timeless track of the trajectory, the motion parameters (initial conditions, displacement, velocity, acceleration parameter) are the determinants of the geometric properties of trajectories.[1] The whole movement process is the forming process of the geometric properties.
Accordingly we must research movement parameters and all factors related to the movement process to study the geometric precision of the timeless track, take comprehensive consideration to the parts machining accuracy, tool path geometry characteristics, NC machine tool kinematics and dynamics characteristics of a variety of factors.[2] Due to formingtrajectory is a process, so, trajectory control should be a series of motion state control.
The contour can be depicted as function of position, having the corresponding geometric properties, such as the tangent slope, curvature, torsion rate.
As long as the tool motion according with the planning movement characteristics, their trajectories geometric properties can achieve the requirements of a given contour curve.
Journal of Mechanical Engineering, 2002, 38 (1):31-34
Online since: June 2010
Authors: Sheng Ru Qiao, Cheng Yu Zhang, Yi Xia, Chao Yan
But amorphous SiCN matrix would occur crystallization when subjected to high temperature [2,3], and crystallization behavior has complex effect on properties.
It will destroy the primitively dense microstructure of C/SiCN and result in falling of mechanical properties.
The stress field within amorphous SiCN is also considered as a factor that may affect the crystallization.
Secondly, the diffusion behavior of atomics is affected by many factors.
Online since: August 2013
Authors: Ying Jun Li, Ru Jian Ma, Xiu Hua Men, Qi Zhang
Cold heading technology is used in the small and medium-sized steel balls forming, and can ensure product accuracy and mechanical properties.
For the cold heading process defects problem,the common approach using artificial detection increased the subsequent workload and affect the entire production process of the steel ball.
(3) In this paper, influencing factors on the sensor is analyzed by ANSYS analysis.
It concludes the PVDF external radius, upper and lower cover surrounded by regional height change on PVDF films stress value have obvious influence, and to establish a mapping relationship between the influence factors and stress.
Mechanical Systems and Signal Processing 36 (2013) 317–331.
Online since: August 2016
Authors: Bernd-Arno Behrens, Christian Bonk, Milan Vucetic, Anas Bouguecha
In contrast to flow behaviour at high strains or anisotropy of metals at elevated temperatures the inelastic heat fraction that also affects these properties isn’t well investigated at least for AHSS.
On the basis of this results the concept of stored and dissipated energy fractions were introduced and the factor (also known as, which is used in this paper) was defined as: . (1) This formulation describes the relation between the heat power and the mechanical power .
Table 1: Material properties of DP600 and DP1000 [10] Material [] [] [] [] [-] DP600 500 7500 28 1310-6 0.9 DP1000 500 7500 27 1310-6 0.9 It should be noted that was assumed to be constant during the deformation and as well as were calculated by the assumption of volume constancy and the axial elongation that was measured by the push rods.
On the other hand the thermal material properties of both dual phase steels should be similar, so that at least a quantitative comparison is possible.
Inelastic heat fraction estimation from two successive mechanical and thermal analyses and full-field measurements.
Showing 15771 to 15780 of 25946 items