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Online since: May 2014
Authors: Hanadi G. Salem, El Sayed M.A. Rassoul, W.H. El-Garaihy
Introduction Grain size can be regarded as a key microstructural factor affecting nearly all aspects of the physical and mechanical behavior of polycrystalline metals [1].
The hot pressing and sintering processes always be associated with grain coarsening, which leads to deterioration of the mechanical properties of the component [4].
This indicates a significant degree of inhomogeneity in the distribution of mechanical properties across the disc cross section.
Kim," Mechanical properties of copper after compression stage of high-pressure Torsion", Mat.
Rassoul, "Influence of HPT on the Consolidation Behavior and Mechanical Properties of AA6061-SiCp Composites Powders", Supplemented Proceeding: Volume 1, Mat.
Online since: December 2013
Authors: Seyed Navid Seyedi, Pouyan Rezvan, Amir Hossein Azadnia, Mohd Yusof Noordin
Most of the newly introduced concretes have other chemical ingredients to enhance diverse properties.
Moreover, appropriate usage of supplementary cementitious materials such as slag cement and fly ash in concrete can play a significant role to enhance different properties of concrete.
Step 2-Selecting appropriate elements, sub elements, and influencing factors.
Step 3- Weighting the sub elements and influencing factors.
In this paper, it is assumed that weights of influencing factors are equal.
Online since: July 2014
Authors: Hong Biao Liu, Hong Nan Li
Based on the characteristics of high-piled wharf in coastal ports and staying in particular environment, the mechanical properties of coastal high-piled wharf is analyzed, and the health monitoring parameters are proposed.
And also the dynamic properties of wharf structure can reflect the health state of structure.
Therefore, the dynamic properties of wharf structure should also be used as an indicator of long-term health monitoring.
The monitoring parameters of wharf dynamic properties mainly respect modal information of structure, including structural natural frequencies, mode shapes and damping ratios.
Based on the characteristics of high-piled wharf in coastal ports and staying in particular environment, the mechanical properties of coastal high-piled wharf is analyzed, and the health monitoring parameters are proposed.
Online since: October 2013
Authors: Ren Du, Xiao Qiao Qi, Xiao Chen Wang
There are three main factors of affecting ensilage.
Main Parameters Affecting the Quality of Pasture Ensilage Moisture Content and Density of Pasture.
So the main factors influencing the ensilage include the following three aspects.
Second, its property resisted puncture, tear and ultraviolet rays is very good.
Fourthly, it has good gas resistance property, namely, its permeability resisted to oxygen is good.
Online since: October 2012
Authors: Zhou Hong Cao, Zheng Xiao, Ji Jian Lian
Based on the analysis of influence of foundation elastic rebound and concrete hardening on the response of elastic foundation beam, the paper thinks it is an important cause that designers ignore the above factors of the construction process, and considering the worst case, and suggests designers should ignore the affection of the lock floor’s deadweight when computing the negative moment.
According to the universal and regular phenomenon of the floor’s cracks of Hollywood type structure, relying on a lock engineering, the authors obtained some useful conclusions by establishing finite element model considered foundation elastic rebound and other influencing factors of the construction on the basic of the general calculating method and further analyzing the reasons for the floor's cracks.
The floor's internal force calculative method of considering the construction process According to the standard methods of design, ship lock floor often cracked in the process of construction including filling the soil, etc, and had the characteristic of regularity, this might matter with not considering some factors of the construction process.
In fact the concrete whose mechanical properties changed constantly from pouring to finally solidifying, the changes were likely to affect the internal force.
(1) Foundation elastic rebound, concrete hardening and other factors during construction process had important influences on the floor’s internal force when calculating and analyzing the floor's internal force of lock.
Online since: June 2015
Authors: Andanastuti Muchtar, Huda Abdullah, Savisha Mahalingam, Sahbudin Shaari, Izamarlina Asshari, Azimah Omar, Nurul Ain Md Nawi
The changes in the structural properties were analyzed by means of transmission electron microscopy (TEM) and atomic force microscopy (AFM) analysis.
The research focus mainly on the influence of annealing temperature ranging from 400 to 600 ºC on the surface morphology and structural properties of SnO2/MWCNTs and how does it affect the photovoltaic performance in DSSC.
An optimal temperature was proposed for SnO2/MWCNTs which produces best structural properties with a high conversion efficiency for DSSC.
Guo, Fabrication and luminance properties of field emission backlight unit based on SnO2 nanowires, Mater.
Sunkara, Surface properties of SnO2 nanowires for enhanced performance with dye-sensitized solar cells, Energy & environmental Science 2 (2009) 1302-1309
Online since: June 2021
Authors: Su Mei Zheng, Teng Zhang
It facilitates the selection of the factors of the technological process which shortens the time and reduces the cost of production preparation [22].
Interactions, structure and properties in PLA/plastici-zed starch blends.
[9] Ke, T., Sun, X., Effects of moisture content and heat treatment on the physical properties of starch and poly (lactic acid) blends.
Physical and degradation properties of binary or ternary blends composed of poly (lactic acid), thermoplastic starch and GMA grafted POE.
Physical and thermal mechanical properties of corn starch/LDPE composites.
Online since: October 2012
Authors: Rui Qiang Yue, Yong Ma, Hong Yang, Shao Lin Fang, Zhong Lin Tang, Dan Dan Li, Ming Zhang, Wen Jiang Jiang, Ying Xin Zhou, Chuan Tang
Engineering properties of Mengzi expansive soil Mengzi Town is located at latitude 23°20′, longitude 103°23′, with height 1309 meters.
The physical and mechanical indices of Mengzi expansive soil are listed in Table 1.
Comparing to expansive soil in other areas, Mengzi expansive soil has some bad engineering properties, such as higher moisture content, higher void ratio, lower density, higher plasticity and stronger shrinkage.
Also the water content which affects expansion deformation is more sensitive than the dry density.
The first three factors are the intrinsic factors of water immersion expansion deformation.
Online since: November 2014
Authors: Cong Du, Lian Sheng Liu, Jian Guang Fan
Experiments show that the injection pressure and air/liquid ratio (ALR) are the major factors impacting the atomization stability, and the flow coefficient of the nozzle ranged in 0.1-0.15.
The location and area ratio of the aerator holes, final discharge orifice diameter, the length to diameter ratio play important roles on the performance of effervescent atomizer, and the spray behavior, including the liquid flow rate, the velocity distribution of the droplets and the spray angle, are affected by a series of factors such as the liquid and gas physical properties, the operating parameters, including the injection pressure drop and GLR.
Figure 10 Later stage of the bubble flow 4 Conclusion Based on numerical analysis and experimental method, the inner flow field and the influencing factors are analyzed in this paper.
American Society of Mechanical Engineers, 94-GT-495, 1994. 1-6
Online since: June 2013
Authors: Xi Jian Zheng, Hong Zhang, Jin Bao Zeng
Research of Intelligent Monitoring System of Tower Crane Based On RFID Xijian ZHENG1, a, Jinbao ZENG2, b and Hong ZHANG3, c 123School of Traffic and Mechanical Engineering, Shenyang Jianzhu University, Shenyang China 110168 axijianzheng@sina.com, bfenzonzeng@163.com, cyiren630@163.com Keywords: Tower cranes group; RFID; Anti-collision; Internet of Things Abstract: To ensure the efficiency and safety of the construction, it needs to monitor the real-time work status of single tower crane and between each other.
However, due to the factors such as unreasonable optimal configuration of tower cranes, lower collaboration efficiency and unable to issue warning signals when encounter dangerous situations, construction progress would be affected or even lead to construction incidents.
Coupled with its advantages of small size, strong anti-interference ability, non-contact transmission, no barrier reading as well as larger data storage, and combined with the characteristics that there are many obstacles in construction sites and many electromagnetic waves generated by the electrical and mechanical equipments, there will certainly be a good prospect of application for RFID technology in the wireless communication system of group controlling of the tower cranes. 2 Hardware System Design of Wireless Communication System Fig. 1 The hardware system block diagram of tower crane The design of the hardware system structure includes the microprocessor (C8051F020), I / O expansion module (for digital-to-analog conversion), the buzzer alarm module (for hazard warning), relay control parking module (for emergency stop of tower crane), GPRS module (for long-distance wireless communication), RFID wireless communication module (for signal acquisition and data transmission) and
The tower crane's hardware system block diagram is shown in Figure 1. 3 Application of RFID Technology in Wireless Communication System of Group Controlling of the Tower Cranes During the operations of the tower cranes group, accidents such as tower crane collisions often occur because of the factors of irrational allocation of resources, poor coordination between the tower cranes and unable to send timely early warning signals when tower cranes are close, which cause huge property losses and casualties.
Mechanical Engineering and Automation.
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