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Online since: September 2006
Authors: S. Patsias
For the results presented here, all precautions were
taken, to ensure that all the specimens were tested at the same strain amplitude and thus avoiding
any other phenomena affecting their behaviour.
As one might expect the elastic and damping properties of polyurethane would be strongly temperature dependent, whereas for the ceramic coating the opposite is true.
Cfl Temperature [ ] Cfl First set of tests Second set of tests 23 64% Factor of 2.1 100 Factor of 2 Factor of 2.5 150 Factor of 1.9 Factor of 2.5 Table 1.
It is true that temperature now becomes a parameter affecting the damping of the otherwise non-temperature dependent ceramic coating, but not to a great effect.
Williams, Hard damping coatings: material properties and F.E. prediction method, CD-Rom Proceedings of the 8 th National Turbine Engine High Cycle Fatigue (HCF) Conference, Monterey, California, April 14-16, (2003).
As one might expect the elastic and damping properties of polyurethane would be strongly temperature dependent, whereas for the ceramic coating the opposite is true.
Cfl Temperature [ ] Cfl First set of tests Second set of tests 23 64% Factor of 2.1 100 Factor of 2 Factor of 2.5 150 Factor of 1.9 Factor of 2.5 Table 1.
It is true that temperature now becomes a parameter affecting the damping of the otherwise non-temperature dependent ceramic coating, but not to a great effect.
Williams, Hard damping coatings: material properties and F.E. prediction method, CD-Rom Proceedings of the 8 th National Turbine Engine High Cycle Fatigue (HCF) Conference, Monterey, California, April 14-16, (2003).
Online since: April 2013
Authors: Sulaiman Hasan, Muhammad Farid Shaari, Mohd Hilmi Othman
Clamping mechanism had several designs, either mechanical (toggle), hydraulic or hydro-mechanical.
Meanwhile, Åkesson et al. [5] has performed the analysis of dynamic properties of boring bars concerning different clamping conditions.
In their research, they have focused on the clamping properties that influence on the dynamic properties of clamped boring bars [5].
Furthermore, the hydraulic cylinder has been use for a long period of time which affects its efficiency to produce the value of force that it should be.
[5] Henrik Åkesson, Tatiana Smirnova, Lars Håkansson, Analysis of dynamic properties of boring bars concerning different clamping conditions, Mechanical Systems and Signal Processing, 23- 8, (2009) 2629-2647
Meanwhile, Åkesson et al. [5] has performed the analysis of dynamic properties of boring bars concerning different clamping conditions.
In their research, they have focused on the clamping properties that influence on the dynamic properties of clamped boring bars [5].
Furthermore, the hydraulic cylinder has been use for a long period of time which affects its efficiency to produce the value of force that it should be.
[5] Henrik Åkesson, Tatiana Smirnova, Lars Håkansson, Analysis of dynamic properties of boring bars concerning different clamping conditions, Mechanical Systems and Signal Processing, 23- 8, (2009) 2629-2647
Online since: March 2012
Authors: Rui Xia Yang, Guo Feng Pan, Yu Ling Liu, Juan Wang, Ru Wang
For CMP process, all sorts of factors, including particles or contaminations, macro aggregate abrasive particles, polishing by-product filling polishing pad, and other factors (for example the dissolved gas and light effect), may influence the uniformity of the wafer surface[4-5].
It is very important to strengthen the mechanical effect in order to improve the material removal speed and restrain chemical effect.
Friction capability affected by the size, shape, the structure of abrasive particles and surface charge distribution is an important parameter of mechanical effect, especially to remove material speed of CMP process.
Optical end point detection can be set arbitrary thickness according to the infrared interference detection; the motor current detection depends on different drive current caused by different materials friction properties; polishing pad temperature test belongs to indirect testing technology as the former two detection added usually. 3.
Investigation of optical properties of benzocyclobutene wafer bonding layer used for 3D interconnects via infrared spectroscopic ellipsometry.
It is very important to strengthen the mechanical effect in order to improve the material removal speed and restrain chemical effect.
Friction capability affected by the size, shape, the structure of abrasive particles and surface charge distribution is an important parameter of mechanical effect, especially to remove material speed of CMP process.
Optical end point detection can be set arbitrary thickness according to the infrared interference detection; the motor current detection depends on different drive current caused by different materials friction properties; polishing pad temperature test belongs to indirect testing technology as the former two detection added usually. 3.
Investigation of optical properties of benzocyclobutene wafer bonding layer used for 3D interconnects via infrared spectroscopic ellipsometry.
Online since: August 2013
Authors: Muhamad Zaini Yunos, Zawati Harun, Hatijah Basri, Mohd Riduan Jamalludin, Muhamad Fikri Shohur
Introduction
Polysulfone (PSf) membrane has been widely used in fabrication ultrafiltration membrane due its low cost, superior film ability, good mechanical and anti-compaction properties and strong chemical and thermal stabilities [1].
The effect of this fouling mechanism on flux decrease depend of factors such as membrane pore size [2] , solute loading and size distribution [3].
Furthermore, the addition of additive into solution may contribute to the changeable properties of membrane in term of pore distribution, physical properties and mechanical characteristics [10].
According to previous studies, by using fumed silica as an additive, membrane conductivity and mechanical properties was improved [10].
Beside that it also offers a biodegradable properties and green technology to membrane separation process.
The effect of this fouling mechanism on flux decrease depend of factors such as membrane pore size [2] , solute loading and size distribution [3].
Furthermore, the addition of additive into solution may contribute to the changeable properties of membrane in term of pore distribution, physical properties and mechanical characteristics [10].
According to previous studies, by using fumed silica as an additive, membrane conductivity and mechanical properties was improved [10].
Beside that it also offers a biodegradable properties and green technology to membrane separation process.
Online since: October 2012
Authors: Zhi Hua Guo, Yong Zhou, Liang Wu
Result shows that the failure mechanism of typical elements changes from compression-shear failure into shear-tensile failure gradually with the increase of their position, for the effecting factors of the freedom and the loading from the hole.
In this paper, the dynamic finite element analysis software, together with concrete damage model, is employed to analyze the effects of the mechanism on rock properties of dynamic stress field of air-decked blasting in hole bottom.
Conclusions In this paper, the dynamic finite element analysis software, together with JHC concrete damage model, is employed to analyze the effects of the mechanism on rock properties of dynamic stress field of bottom-air-decked charge structure.
The conclusions are as follows: (1) For bottom-air-decked charge structure of the indirect initiation, elements stress state is complex because of affecting factors of the free surface and loading and unloading wave in blasting hole.
Melnikov: Reports of the Ⅵ science symposium on drilling, explosives, explosion operations and study of physical and mechanical properties of rocks, (Rolla, USA), Gosgortekhizdat (1962)
In this paper, the dynamic finite element analysis software, together with concrete damage model, is employed to analyze the effects of the mechanism on rock properties of dynamic stress field of air-decked blasting in hole bottom.
Conclusions In this paper, the dynamic finite element analysis software, together with JHC concrete damage model, is employed to analyze the effects of the mechanism on rock properties of dynamic stress field of bottom-air-decked charge structure.
The conclusions are as follows: (1) For bottom-air-decked charge structure of the indirect initiation, elements stress state is complex because of affecting factors of the free surface and loading and unloading wave in blasting hole.
Melnikov: Reports of the Ⅵ science symposium on drilling, explosives, explosion operations and study of physical and mechanical properties of rocks, (Rolla, USA), Gosgortekhizdat (1962)
Online since: March 2012
Authors: Maizlinda Izwana Idris, Imran H. Ghazali, Chan Wen Shan
The mechanical properties of flexible PU foams filled with coconut coir fibres and recycled tyre were investigated.
Thus, there is a trade-off in between both, mechanical and damping properties of composite.
Hence, the purpose of the paper is to studied the mechanical properties of filled-foams developed.
Since the dispersion level and orientation of fillers are almost similar for foams with recycled tyre and coir fibres inclusion, thus, the others from the listed will be the main factors in affect the compression properties.
This is actually unexpected since an increment of treated coir to foam composites are supposedly to be positive factor for mechanical properties improvement, at least compare with those having small amount of coir fibres inclusion.
Thus, there is a trade-off in between both, mechanical and damping properties of composite.
Hence, the purpose of the paper is to studied the mechanical properties of filled-foams developed.
Since the dispersion level and orientation of fillers are almost similar for foams with recycled tyre and coir fibres inclusion, thus, the others from the listed will be the main factors in affect the compression properties.
This is actually unexpected since an increment of treated coir to foam composites are supposedly to be positive factor for mechanical properties improvement, at least compare with those having small amount of coir fibres inclusion.
Online since: March 2016
Authors: Aleksei N. Lachinov, Natalya V. Vorob'eva
The external factors create the overlap of the wave functions of trapped electrons (that are injected from metallic or semiconductive electrode) in the polymer layer and so the insulator-metal phase transition becomes possible.
Overcoming such barriers may provide external factors: normal mechanical pressure, electric field, magnetic field and so on.
Let us consider the effect of external factors used in the present work.
Normal mechanical pressure affects the magnitude of the potential barrier.
Each of these factors alone can create a narrow zone and provide the charge transport independently [7].
Overcoming such barriers may provide external factors: normal mechanical pressure, electric field, magnetic field and so on.
Let us consider the effect of external factors used in the present work.
Normal mechanical pressure affects the magnitude of the potential barrier.
Each of these factors alone can create a narrow zone and provide the charge transport independently [7].
Online since: March 2023
Authors: Rachid Tiberkak, Madjid Ezzraimi, Mohammed Essidik Lazar, Yasser Chiker, Morad Bachene, Said Rechak
Due to their high mechanical properties coupled with lightweight, FG-CNTRCs are mainly used in the aerospace industry and in advanced engineering applications.
In this fascinating area of research and innovation, Mohan et al [2] developed a way to improve the mechanical properties of polymeric devices, fabricated by additive manufacturing, by combining electrospinning and stereolithography in a single automated process.
Theoretical Formulation and Field Equations The distribution of carbon nanotubes through the thickness direction of the composite plate is known as the uniform distribution of nanotubes (UD), while the dispersed CNTs in patterns are known as FG-X, FG-O, FG-A and FG-V. 2.1 Mechanical proprieties of CNTRC plate In this study, the rule of mixture is used to calculate the material properties of carbon nanotubes (CNTs).
The mechanical properties of the CNTs and the matrix are: CNTs: , , , and .
Eltaher, Free Vibration of FG-CNTRCs Nano-Plates/Shells with Temperature-Dependent Properties, Mathematics. 10 (2022) 583
In this fascinating area of research and innovation, Mohan et al [2] developed a way to improve the mechanical properties of polymeric devices, fabricated by additive manufacturing, by combining electrospinning and stereolithography in a single automated process.
Theoretical Formulation and Field Equations The distribution of carbon nanotubes through the thickness direction of the composite plate is known as the uniform distribution of nanotubes (UD), while the dispersed CNTs in patterns are known as FG-X, FG-O, FG-A and FG-V. 2.1 Mechanical proprieties of CNTRC plate In this study, the rule of mixture is used to calculate the material properties of carbon nanotubes (CNTs).
The mechanical properties of the CNTs and the matrix are: CNTs: , , , and .
Eltaher, Free Vibration of FG-CNTRCs Nano-Plates/Shells with Temperature-Dependent Properties, Mathematics. 10 (2022) 583
Online since: March 2013
Authors: Xia Li, Jin Kui Li, Hua Zhong Sun
This paper, the Dalian Xinghai Zhong Long Yuan landslides treatment project, analysis of landslides generated by internal causes and predisposing factors, obtained a landslide failure mechanism, and the causes of slope cutting, improve cut flood drainage structures, prestressed anchor Mississauga solid technical measures.
On August 9, 2011, the ninth super typhoon storm Muifa influence, caused landslides geological disasters, megalith tumble into Zhong Long Yuan village, seriously affected the normal life of the residents.
This paper analyzes in detail the landslides mechanism Zhong Long Yuan, the cause of the factors and on this basis to take the concrete wall and prestressed anchor cable engineering reinforcement technology.
(a) Mountain landslide process sketch (b) Mountain landslide photo Fig.1.Mountain landslide process and its photo in Xinghai Zhong Long Yuan 1.2 Engineering Geological Properties Landslides site original landform belong to low hills geomorphic unit, terrain for meteorological north low, slope to for east-west, artificial slope, relief is bigger, slope height of 16.0-20.0m, long approximately 120m, most of the slope height of 20.0m.
Slope cutting combination of mechanical and artificial slope cutting. 2.
On August 9, 2011, the ninth super typhoon storm Muifa influence, caused landslides geological disasters, megalith tumble into Zhong Long Yuan village, seriously affected the normal life of the residents.
This paper analyzes in detail the landslides mechanism Zhong Long Yuan, the cause of the factors and on this basis to take the concrete wall and prestressed anchor cable engineering reinforcement technology.
(a) Mountain landslide process sketch (b) Mountain landslide photo Fig.1.Mountain landslide process and its photo in Xinghai Zhong Long Yuan 1.2 Engineering Geological Properties Landslides site original landform belong to low hills geomorphic unit, terrain for meteorological north low, slope to for east-west, artificial slope, relief is bigger, slope height of 16.0-20.0m, long approximately 120m, most of the slope height of 20.0m.
Slope cutting combination of mechanical and artificial slope cutting. 2.
Online since: April 2013
Authors: M.A. Ghaffor, A. Tlemçani, M. Derrar, N. Boualem, A. Raid
Cermets (carbide ceramic matrices in metal) WC-Co, WC-Co-Cr, WC-VC-Co and WC-Ni are commonly used as coating material on the substrate surfaces to impart appropriate tribological properties [6-8].
The XC-Co coatings adhesive properties are affected by changes in roughness and the results showed that the adhesion strength of thermally sprayed deposits increases significantly with the surface finish [10].
Preparation of test specimens In the present applications, we choose two materials commonly used in thermal spraying: 5086 aluminum alloy for lightness and the 304L stainless steel due to its high mechanical properties.
The particles chemical reaction with the surrounding gas and heat transfer with the substrate affects the deposit properties such as the porosity degree, impurities, residual stresses and metallurgical structure.
Factor, I.
The XC-Co coatings adhesive properties are affected by changes in roughness and the results showed that the adhesion strength of thermally sprayed deposits increases significantly with the surface finish [10].
Preparation of test specimens In the present applications, we choose two materials commonly used in thermal spraying: 5086 aluminum alloy for lightness and the 304L stainless steel due to its high mechanical properties.
The particles chemical reaction with the surrounding gas and heat transfer with the substrate affects the deposit properties such as the porosity degree, impurities, residual stresses and metallurgical structure.
Factor, I.