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Online since: September 2017
Authors: Ruslan R. Safin, R.T. Khasanshina, Nour R. Galyavetdinov
However, while using wood in the production of building materials, it is necessary to consider a set of factors, as along with the valuable properties (low average density, ease of handling, etc.) it has a number of negative qualities, which complicate production of construction materials of desirable quality.
Introduction All It's well known that natural wood has a fairly limited lifespan and is exposed to various aggressive environmental factors.
This fact explains the desire to find an alternative to wood of similar properties, but surpassing it in quality.
Researches of Hannah Epmeier, Mats Westin and Andreas Rapp were focused on the sorption and physic mechanical properties of thermally modified wood.
In this regard deep research of physical properties of thermally modified wood filler, as well as the development of new technologies that will significantly improve the physic-mechanical properties of wood-plastic composites is an important task today.
Introduction All It's well known that natural wood has a fairly limited lifespan and is exposed to various aggressive environmental factors.
This fact explains the desire to find an alternative to wood of similar properties, but surpassing it in quality.
Researches of Hannah Epmeier, Mats Westin and Andreas Rapp were focused on the sorption and physic mechanical properties of thermally modified wood.
In this regard deep research of physical properties of thermally modified wood filler, as well as the development of new technologies that will significantly improve the physic-mechanical properties of wood-plastic composites is an important task today.
Online since: January 2012
Authors: Shi Guo Du, Hai Ping Cui, Ming Qiu Wang, Jun Yan
The effect of these factors such as time and copper salt concentration on the film component and surface resistivity was analyzed.
Being plated with non crystal alloy film, plastic materials have better chemical and mechanical properties of nonmetal materials, and can be uses as good ornaments; what’s more, the process raises the electro conductibility, which enables nonmetal materials to shield electromagnetic waves.
The reason is that the solution concentration affects the metal deposition rate. 3) As the deposition time increases, the electromagnetic shielding property of Ni-Cu-P alloy film tends to increase.
Acknowledgements This work was financially supported by the Defensive Pre-research Foundation and Science Research Foundation of Shijiazhuang Mechanical Engineering College (JCB1006).
(Mechanical Industries Publications, China 1998) [2] K.
Being plated with non crystal alloy film, plastic materials have better chemical and mechanical properties of nonmetal materials, and can be uses as good ornaments; what’s more, the process raises the electro conductibility, which enables nonmetal materials to shield electromagnetic waves.
The reason is that the solution concentration affects the metal deposition rate. 3) As the deposition time increases, the electromagnetic shielding property of Ni-Cu-P alloy film tends to increase.
Acknowledgements This work was financially supported by the Defensive Pre-research Foundation and Science Research Foundation of Shijiazhuang Mechanical Engineering College (JCB1006).
(Mechanical Industries Publications, China 1998) [2] K.
Online since: September 2006
Authors: Emmanuel Girard, Ronald Guillén, Sylvain Fréour
Ti-17 has strength properties
superior to those of Ti-6Al-4V.
The first step of designing an experiment with known number of factors in Taguchi's method is to select the most suitable O.A..
In the present study, since there are five factors with two levels, the orthogonal array L8(25-2) that involves 8 trial runs was selected.
The vertical columns of O.A. correspond to the factors specified in the study.
Among the explored factors, insert type and tool-path strategy were found to significantly affect residual stress states in feed direction.
The first step of designing an experiment with known number of factors in Taguchi's method is to select the most suitable O.A..
In the present study, since there are five factors with two levels, the orthogonal array L8(25-2) that involves 8 trial runs was selected.
The vertical columns of O.A. correspond to the factors specified in the study.
Among the explored factors, insert type and tool-path strategy were found to significantly affect residual stress states in feed direction.
Online since: June 2011
Authors: Jiu Peng Zhang, Jian Zhong Pei, Li Xu
The dynamic shear rheometer (DSR) was used to measure viscoelastic properties of asphalt mastic.
Introduction The quality of mastics, mixed with asphalt binder and fillers, influences the overall properties of asphalt mixture.
In other hands, effective elastic material properties can be directly converted to viscoelastic properties using the correspondence principle on the basis of the Laplace transform and Carson transform [6].
A mechanical mixer was used to blend the fillers and asphalt binder at 160°C.
Interaction capability of asphalt and aggregate is a crucial factor to affect the engineering performance of asphalt mixtures [4].
Introduction The quality of mastics, mixed with asphalt binder and fillers, influences the overall properties of asphalt mixture.
In other hands, effective elastic material properties can be directly converted to viscoelastic properties using the correspondence principle on the basis of the Laplace transform and Carson transform [6].
A mechanical mixer was used to blend the fillers and asphalt binder at 160°C.
Interaction capability of asphalt and aggregate is a crucial factor to affect the engineering performance of asphalt mixtures [4].
Online since: October 2010
Authors: Gui Wen Kang
Conventional mechanical methods couldn’t satisfy the challenging industry [2].
The affected layer has to be deep enough to melt the roughness peaks, but it must not be deeper than the valleys.
Important Factors in Laser Polishing Laser polishing has a series of advantages shown as follow: It can be used to different kind of materials.
The process depends on three factors: the surface material, its initial topography and the energy density of the laser beam.
One of the most important aspects to be controlled is the influence of the process in the polished surface properties.
The affected layer has to be deep enough to melt the roughness peaks, but it must not be deeper than the valleys.
Important Factors in Laser Polishing Laser polishing has a series of advantages shown as follow: It can be used to different kind of materials.
The process depends on three factors: the surface material, its initial topography and the energy density of the laser beam.
One of the most important aspects to be controlled is the influence of the process in the polished surface properties.
Online since: August 2019
Authors: Tanasait Ngawhirunpat, Pattaranut Eakwaropas, Theerasak Rojanarata, Prasert Akkaramongkolporn, Prasopchai Patrojanasophon, Praneet Opanasopit, Yin Yin Myat
The objective of this study was to optimize fabrication variables that affected desirable properties of dressings.
The objective of this study was to optimize fabrication variables that affected desirable properties of B. rotunda extract loaded PVA hydrogel dressings, including maximum elongation at break, maximum water content, maximum swelling and minimum erosion.
A Box-Behnken design with 3 factors, 3 levels and 17 experiments was chosen for this study.
Hydrogel dressing characterization Mechanical properties: Tensile strength, elongation at break and Young’s Modulus were measured using texture analyzer (model XT Plus, Texture Technologies).
Choi, Development of a novel sodium fusidate-loaded triple polymer hydrogel wound dressing: Mechanical properties and effects on wound repair, International Journal of Pharmaceutics 497 (2016) 114-122
The objective of this study was to optimize fabrication variables that affected desirable properties of B. rotunda extract loaded PVA hydrogel dressings, including maximum elongation at break, maximum water content, maximum swelling and minimum erosion.
A Box-Behnken design with 3 factors, 3 levels and 17 experiments was chosen for this study.
Hydrogel dressing characterization Mechanical properties: Tensile strength, elongation at break and Young’s Modulus were measured using texture analyzer (model XT Plus, Texture Technologies).
Choi, Development of a novel sodium fusidate-loaded triple polymer hydrogel wound dressing: Mechanical properties and effects on wound repair, International Journal of Pharmaceutics 497 (2016) 114-122
Online since: July 2011
Authors: Ya Feng Ji, Hong Zhang, Qing Quan Duan, Yan Bin Cao
Through the mechanics analysis of CT with finite element method (FEM) in working state at the wellhead, the results show that high stress and high strain are the main factors which cause CT failure.
Although a few papers have been presented to describe the failure life of coiled tubing, the basic reasons affecting the coiled tubing working life are not discussed in detail.
The other way is mechanical analysis, much simpler than the first method.
To get the axial strain without internal pressure, considering the CT string fatigue life influencing factors and boundary conditions, CT fatigue life mechanical model is established at the wellhead.
Vol39(5), 2010, p10-13 [4] Bi, Z.Y., Xian, L.Y. and Jing, X.T: Low Cycle Fatigue Property and Life of Coiled Tubing under Large Deformation.
Although a few papers have been presented to describe the failure life of coiled tubing, the basic reasons affecting the coiled tubing working life are not discussed in detail.
The other way is mechanical analysis, much simpler than the first method.
To get the axial strain without internal pressure, considering the CT string fatigue life influencing factors and boundary conditions, CT fatigue life mechanical model is established at the wellhead.
Vol39(5), 2010, p10-13 [4] Bi, Z.Y., Xian, L.Y. and Jing, X.T: Low Cycle Fatigue Property and Life of Coiled Tubing under Large Deformation.
Online since: July 2014
Authors: Yan Liu, Dao Xun Ma, Yong Lai
., LTD, Beijing, 100621, China
3Department of Civil Engineering, Beihang University, Beijing, 100191, China
adaoxunma@126.com, btjdoc@tom.com, clzg2076@163.com
Keywords: Highway coarse aggregate; Airport pavement concrete; Mechanical properties; Frost-resisting durability
Abstract.
Introduction The quality stability of airport pavement concrete is a pretty important factor to guaranteeing the safe fall of aircraft.
Since the performance of structure is largely affected by the raw material properties and mix design, so the reasonable choice is particularly important.
According to the analysis above mentioned, the 5~31.5 mm coarse aggregate will be applied to the mix design of airport pavement concrete in this paper, studying the mechanical property and frost resistance durability of airport pavement concrete using the 5~31.5 mm coarse aggregate, further providing a certain basis to optimize the specification of airport pavement concrete.
The reason of airport pavement concrete using 5~31.5 mm coarse aggregate being good mechanical property and durability is that the coarse aggregate grading has an appropriate maximum particle size and size distribution.
Introduction The quality stability of airport pavement concrete is a pretty important factor to guaranteeing the safe fall of aircraft.
Since the performance of structure is largely affected by the raw material properties and mix design, so the reasonable choice is particularly important.
According to the analysis above mentioned, the 5~31.5 mm coarse aggregate will be applied to the mix design of airport pavement concrete in this paper, studying the mechanical property and frost resistance durability of airport pavement concrete using the 5~31.5 mm coarse aggregate, further providing a certain basis to optimize the specification of airport pavement concrete.
The reason of airport pavement concrete using 5~31.5 mm coarse aggregate being good mechanical property and durability is that the coarse aggregate grading has an appropriate maximum particle size and size distribution.
Online since: May 2006
Authors: Giuseppe Pezzotti, Makoto Kondo, Junji Ikeda
We found that the phase stability was affected not only by grain size but
also by residual stress field, which could be quantitatively measured by Raman piezo-spectroscopy
and controlled by sintering temperature.
Introduction: 3 mol% yttria stabilized tetragonal polycrystalline zirconia (3Y-TZP) and alumina have been extensively used for orthopedic implants such as hip and knee joint prostheses due to its excellent mechanical properties, high wear resistance and superior biocompatibility [1, 2].
We attempted to rationalize the factors affecting phase stability.
Therefore, it is important to manufacture zirconia materials at validated process, considering both mechanical properties and stability in the biological environment.
Vol.13 (1978), p.1464-1470 [7] E.M.Anastassakis: Capter 3 in Dynamical properties of Solids; ed by Horton GK,Maradudin AA (North-Holland Publ Co.) 1980 [8] D.Michel, M.T.Van Den Borre: Advanced in Ceramic Vol24 (1998), p.555-562 [9] G.Pezzotti: J Raman Spectrosc.
Introduction: 3 mol% yttria stabilized tetragonal polycrystalline zirconia (3Y-TZP) and alumina have been extensively used for orthopedic implants such as hip and knee joint prostheses due to its excellent mechanical properties, high wear resistance and superior biocompatibility [1, 2].
We attempted to rationalize the factors affecting phase stability.
Therefore, it is important to manufacture zirconia materials at validated process, considering both mechanical properties and stability in the biological environment.
Vol.13 (1978), p.1464-1470 [7] E.M.Anastassakis: Capter 3 in Dynamical properties of Solids; ed by Horton GK,Maradudin AA (North-Holland Publ Co.) 1980 [8] D.Michel, M.T.Van Den Borre: Advanced in Ceramic Vol24 (1998), p.555-562 [9] G.Pezzotti: J Raman Spectrosc.
An Analysis of the Lateral Dynamic Response of an Axially Moving Cantilever Beam under a Moving Mass
Online since: November 2012
Authors: Zhen Dong Hu, Zhi Xin Zhang
Siddiqui [1] analyzed the vibration property of axially moving cantilever based on flexible multibody dynamics.
So we study its vibration property from three aspects, in which consider the first three order modes
But due to its frequency equal to the natural frequency, so the second order vibration and the third order are affected to a certain extent.
So we can know the result ,which the beam is lack of vibration in curve oa, is affected by the load vector .
Although this paper provides a new theoretical way for engineering application about the axial movement of the beam under the moving mass, further analysis should be done by numerical method or experimental method, on which how other factors (e.g. initial disturbance, external load, et,al) influence the beam’s vibration in practical engineering.
So we study its vibration property from three aspects, in which consider the first three order modes
But due to its frequency equal to the natural frequency, so the second order vibration and the third order are affected to a certain extent.
So we can know the result ,which the beam is lack of vibration in curve oa, is affected by the load vector .
Although this paper provides a new theoretical way for engineering application about the axial movement of the beam under the moving mass, further analysis should be done by numerical method or experimental method, on which how other factors (e.g. initial disturbance, external load, et,al) influence the beam’s vibration in practical engineering.