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Online since: January 2011
Authors: Hui Zhi, Jing Lin, Zhi Hui Sun
SiOx/PET thin film as food packaging material, exhibited not only a high barrier property, a good mechanical property, a safety, a transparency, but also had an excellent microwave permeability.
In order to further optimize magnetron sputtering parameters, improve ceramic films’ barrier properties, and accelerate the process of the films’ application, the coating SiOx film on PET substrate parameters were studied in this article.
Magnetron sputtering technology involved many factors, and each factor has the different levels, and they are intertwined, very complicated.
Interaction Effect Analysis of Two Factors.
In the regression equation, fixed an arbitrary factor in zero level, and researched interaction effects on other two factors.
In order to further optimize magnetron sputtering parameters, improve ceramic films’ barrier properties, and accelerate the process of the films’ application, the coating SiOx film on PET substrate parameters were studied in this article.
Magnetron sputtering technology involved many factors, and each factor has the different levels, and they are intertwined, very complicated.
Interaction Effect Analysis of Two Factors.
In the regression equation, fixed an arbitrary factor in zero level, and researched interaction effects on other two factors.
Online since: December 2018
Authors: Xi Wu Li, Hong Wei Liu, Kai Wen, Li Zhen Yan, Shu Hui Huang, Hong Wei Yan, Bai Qing Xiong, Zhi Hui Li, Yong An Zhang
Thus, annealing on anisotropy and mechanical properties of Al-Mg-Si alloy is discussed in present work.
Results and Discussion Mechanical properties of the T4P treated alloy sheets is summarized in Table 1.
Their mechanical properties are different in the three directions, especailly r value.
Table 1 Mechanical properties of the T4P treated sheets.
The following results can be drawn: The mechanical property anisotropy of the alloy sheet in T4P state is affected by intermediate annealing treatment.
Results and Discussion Mechanical properties of the T4P treated alloy sheets is summarized in Table 1.
Their mechanical properties are different in the three directions, especailly r value.
Table 1 Mechanical properties of the T4P treated sheets.
The following results can be drawn: The mechanical property anisotropy of the alloy sheet in T4P state is affected by intermediate annealing treatment.
Online since: March 2006
Authors: Dong Joo Lee
Comparison of Mechanical Properties of Compression and Injection
Molded PEEK/Carbon Fiber Reinforced Composites
D.
The effects of fiber length on mechanical properties are evident in cases of specimens made by compression molding.
Thus, the change in fiber length would mainly affect the fiber efficiency factors.
It also shows the importance of fiber length to obtain good mechanical properties.
To improve the mechanical properties of SFRP, the maintaining the initial short-fiber length is quite important.
The effects of fiber length on mechanical properties are evident in cases of specimens made by compression molding.
Thus, the change in fiber length would mainly affect the fiber efficiency factors.
It also shows the importance of fiber length to obtain good mechanical properties.
To improve the mechanical properties of SFRP, the maintaining the initial short-fiber length is quite important.
Online since: November 2012
Authors: Elisabete R. Silva, Humberto E. Ferreira, Jorge F.J. Coelho, João C. Bordado
These observations may be due to difficulties of mortar matrix mixing at initial fibre inclusion, which can promotes air entrapped and fibre balling, thus affecting the composite mechanical resistance.
The results revealed that notwithstanding the bridge role of fibres in the matrix, the problems associated to compacting of the cement matrix at initial fibre inclusion, can promotes air entrapped, thus affecting the composite mechanical resistance.
Work is in progress to allow the understanding of the cracking mechanism by evaluating the fracture surface and stress-strain profiles, as well as other FRC properties that can affect their mechanical resistance, such as porosity, shape and diameter/length fibre ratio.
Brandt, Cement-based composites: Materials, Mechanical Properties and Performance, second ed., Taylor & Francis, New York, 2009
Bobko, Mechanical properties of kenaf fiber reinforced concrete, Construction and Building Materials 25 (2011) 1991-2001
The results revealed that notwithstanding the bridge role of fibres in the matrix, the problems associated to compacting of the cement matrix at initial fibre inclusion, can promotes air entrapped, thus affecting the composite mechanical resistance.
Work is in progress to allow the understanding of the cracking mechanism by evaluating the fracture surface and stress-strain profiles, as well as other FRC properties that can affect their mechanical resistance, such as porosity, shape and diameter/length fibre ratio.
Brandt, Cement-based composites: Materials, Mechanical Properties and Performance, second ed., Taylor & Francis, New York, 2009
Bobko, Mechanical properties of kenaf fiber reinforced concrete, Construction and Building Materials 25 (2011) 1991-2001
Online since: May 2019
Authors: Hanaa G. Attiya, Anaam W. Watan, Tagreed M. Al-Saadi
This explains why flexural properties are highly affected by the total area available for deformation [25, 26].
The resultant samples produced better mechanical and thermal properties than the pure resin samples due to excellent mechanical and thermal properties of graphene nanoparticles.
The effect of MWCNTs on the mechanical properties of woven Kevlar/epoxy composites.
Mechanical properties of carbon nanotube reinforced Epoxy Resin composites.
Mechanical Properties of Unsaturated Polyester / Montmorillonite Composites.
The resultant samples produced better mechanical and thermal properties than the pure resin samples due to excellent mechanical and thermal properties of graphene nanoparticles.
The effect of MWCNTs on the mechanical properties of woven Kevlar/epoxy composites.
Mechanical properties of carbon nanotube reinforced Epoxy Resin composites.
Mechanical Properties of Unsaturated Polyester / Montmorillonite Composites.
Online since: August 2011
Authors: Zhu Ji Jin, Shang Gao, Z.C. Tao, Heng Zhen Dai
The influence factors of chemical reaction include grinding pressure, velocity, friction coefficient between abrasives and Al2O3 ceramic, and the external temperature [7] as well.
The properties of abrasives and reactants formed between abrasive and workpiece are given in Table 1.
The material removal of Al2O3 ceramic was based on the solid state reaction between abrasive and workpiece, as well as the mechanical action of abrasives, thus the grinding performance of CMG tools were affected by the chemical reaction rate and the nature of chemical reactants.
So the nature of chemical reactants between abrasives and Al2O3 was considered to be main factor of affecting the grinding performance of CMG tools in this paper.
The main factor of affecting the tool grinding performance was the nature of chemical reactants between abrasives and Al2O3.
The properties of abrasives and reactants formed between abrasive and workpiece are given in Table 1.
The material removal of Al2O3 ceramic was based on the solid state reaction between abrasive and workpiece, as well as the mechanical action of abrasives, thus the grinding performance of CMG tools were affected by the chemical reaction rate and the nature of chemical reactants.
So the nature of chemical reactants between abrasives and Al2O3 was considered to be main factor of affecting the grinding performance of CMG tools in this paper.
The main factor of affecting the tool grinding performance was the nature of chemical reactants between abrasives and Al2O3.
Online since: November 2016
Authors: Ferdinand Hofer, Elisabetta Gariboldi, Paola Bassani, Mihaela Albu, Marco Colombo
Keywords: Aluminum alloys, high temperature, mechanical properties, simulation.
The mechanical properties of Al alloys are strongly affected by their microstructure: the size and shape of precipitates, their homogeneous distribution and their coherency with the matrix are of primary importance for an effective strengthening of the alloys at room and elevated temperatures.
Physically-based models are powerful tools to predict the influence of the mentioned parameters on the mechanical properties of the alloy after age hardening, and also to predict the effect of high temperature service conditions on microstructure evolution.
All these parameters influence strongly the mechanical properties and, in particular, the yield stress of the alloy [1].
Ripamonti, Microstructural stability and related mechanical properties of a Al-Cu-Mg-Si alloy, Aluminum alloy, their Physical and Mechanical Properties, 1 (2008) 1062-1067
The mechanical properties of Al alloys are strongly affected by their microstructure: the size and shape of precipitates, their homogeneous distribution and their coherency with the matrix are of primary importance for an effective strengthening of the alloys at room and elevated temperatures.
Physically-based models are powerful tools to predict the influence of the mentioned parameters on the mechanical properties of the alloy after age hardening, and also to predict the effect of high temperature service conditions on microstructure evolution.
All these parameters influence strongly the mechanical properties and, in particular, the yield stress of the alloy [1].
Ripamonti, Microstructural stability and related mechanical properties of a Al-Cu-Mg-Si alloy, Aluminum alloy, their Physical and Mechanical Properties, 1 (2008) 1062-1067
Online since: November 2016
Authors: Zheng Yi Jiang, H.B. Tibar
Analysis of Thin Strip Shape and Profile in Cold Rolling: A Way to Improve Strip Profile and Mechanical Properties
H.B.
Optimisation of the physical and mechanical properties of cold rolled thin strips is achieved by controlling the rolling parameters.
In this paper, the factors affecting the low carbon steel thin strip profile of asymmetrical cold rolling have been studied at a speed ratio of 1.3 without lubricant applied.
This is attributed to the fact that the differential speed will only impact the microstructure and the mechanical properties of the strip and does not contribute to the final shape or profile of the rolled workpiece.
Ko, Microstructure evolution and mechanical properties of severely deformed Al alloy processed by differential speed rolling, Journal of Alloys and Compounds, 536 (2012) S122-S125
Optimisation of the physical and mechanical properties of cold rolled thin strips is achieved by controlling the rolling parameters.
In this paper, the factors affecting the low carbon steel thin strip profile of asymmetrical cold rolling have been studied at a speed ratio of 1.3 without lubricant applied.
This is attributed to the fact that the differential speed will only impact the microstructure and the mechanical properties of the strip and does not contribute to the final shape or profile of the rolled workpiece.
Ko, Microstructure evolution and mechanical properties of severely deformed Al alloy processed by differential speed rolling, Journal of Alloys and Compounds, 536 (2012) S122-S125
Online since: April 2009
Authors: Suparna Sengupta, Kunal Das, Dipa Ray, N.R. Bandyopadhyay, S.P. Sengupta, Amar K. Mohanty, Manjusri Misra
Their mechanical
properties, visco-elastic property and diffusion co-efficients were also studied.
The highest improvement in mechanical properties was observed in case of 2 weight% clay reinforced films (A).
This optimum combination of both the factors might have increased their properties significantly.
Whereas in B, molecular rearrangement was significantly low, resulting in poor mechanical properties.
But with further increase of clay content upto 15 weight%, there was a diffused morphology, which resulted in a lower mechanical properties.
The highest improvement in mechanical properties was observed in case of 2 weight% clay reinforced films (A).
This optimum combination of both the factors might have increased their properties significantly.
Whereas in B, molecular rearrangement was significantly low, resulting in poor mechanical properties.
But with further increase of clay content upto 15 weight%, there was a diffused morphology, which resulted in a lower mechanical properties.
Online since: June 2014
Authors: Ning Ning Wang, Bang Sheng Xing, Le Xu
Study on Nonlinear Damping Properties of Hydro-Pneumatic Suspension System for XP302-Pneumatic Tyred Roller
Bangsheng Xinga, Ningning Wangb and Le Xuc
School of Mechanical and Electrical Engineering, Jiangsu Normal University,
Xuzhou 221116, China
axbs138@jsnu.edu.cn, bning597524116@126.com, c1183116563@qq.com
Keywods: Hydro-pneumatic Suspension, Stiffness property, Damping property
Abstract.
As it has typical nonlinear characteristics and good damping properties compared with conventional suspension, and has broad prospects for development, therefore, making further study of nonlinear properties of the hydro-pneumatic suspension is very important.
Damping property affects the vehicle's ride directly.
The main factors affecting the hydro-pneumatic suspension stiffness property are cylinder inner diameter, diameter and length of tubing which connected to hydro-pneumatic suspension and accumulator.
These factors provide hydro-pneumatic suspension System designing with basis selected parameters.
As it has typical nonlinear characteristics and good damping properties compared with conventional suspension, and has broad prospects for development, therefore, making further study of nonlinear properties of the hydro-pneumatic suspension is very important.
Damping property affects the vehicle's ride directly.
The main factors affecting the hydro-pneumatic suspension stiffness property are cylinder inner diameter, diameter and length of tubing which connected to hydro-pneumatic suspension and accumulator.
These factors provide hydro-pneumatic suspension System designing with basis selected parameters.