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Online since: May 2013
Authors: Ying Li, Wen Juan Gu, Bang Gui He
The ink penetration behavior depends on the coating surface topography and properties.
There are many factors affecting the structure and surface properties of the coating layer in the papermaking process, which include coating recipes, coating conditions and calendering, etc.
In fact, coating recipe is the important factor which affects structure and properties of coating layer.
Results and Discussion Surface Properties of Coated Samples.
The findings indicated that coating speed affected the surface properties.
There are many factors affecting the structure and surface properties of the coating layer in the papermaking process, which include coating recipes, coating conditions and calendering, etc.
In fact, coating recipe is the important factor which affects structure and properties of coating layer.
Results and Discussion Surface Properties of Coated Samples.
The findings indicated that coating speed affected the surface properties.
Online since: August 2018
Authors: Panjaporn Wongwitthayakool, Jitpimon Siripanth
The dynamic mechanical analysis showed the frequency dependence of storage modulus (G'), loss modulus (G"), and damping factor (tanδ).
The concentrations of AgNP affect physical properties of acrylic resin denture base [2,13].
The aim of this study was to evaluate the influence of the incorporation of prepared AgNPs on the flexural strength and dynamic mechanical properties of the dentures base acrylic resin.
Results and Discussion The flexural strength is carried out to evaluate the mechanical properties of AgNP filled acrylic resin.
The low AgNP concentration is necessary for its efficacy and avoiding negative influence on mechanical properties [18].
The concentrations of AgNP affect physical properties of acrylic resin denture base [2,13].
The aim of this study was to evaluate the influence of the incorporation of prepared AgNPs on the flexural strength and dynamic mechanical properties of the dentures base acrylic resin.
Results and Discussion The flexural strength is carried out to evaluate the mechanical properties of AgNP filled acrylic resin.
The low AgNP concentration is necessary for its efficacy and avoiding negative influence on mechanical properties [18].
Online since: April 2015
Authors: Zakaria Boumerzoug, Fabienne Delaunois, Fethi Remli
Effect of Cutting Speed During Turning of Low Carbon Steel on Mechanical Properties and Surface Roughness
ZAKARIA Boumerzoug1,a, FETHI Remli1 and FABIENNE Delaunois1
1Mechanical Engineering Department, Biskra University, B.P. 145, Biskra, Algeria
2 Metallurgy Department, University of Mons, Belgium 3List all distinct addresses in the same way
azboumerzoug@yahoo.fr
Keywords: turning; cutting speed; surface roughness ; low carbon steel.
We have found that the cutting speed affects the surface layer of a workpiece, induces hardening of the surface, and increases the surface roughness.
Introduction Turning is one of the major manufacturing processes used to produce mechanical parts.
It was found that the surface finish in turning is influenced by several factors such as feed, work material characteristics, workpiece hardness, coolants, cutting speed, depth of cut, tool nose radius and tool cutting edge angles [9-10].
From this investigation, width of surface layer affected by machining was determined.
We have found that the cutting speed affects the surface layer of a workpiece, induces hardening of the surface, and increases the surface roughness.
Introduction Turning is one of the major manufacturing processes used to produce mechanical parts.
It was found that the surface finish in turning is influenced by several factors such as feed, work material characteristics, workpiece hardness, coolants, cutting speed, depth of cut, tool nose radius and tool cutting edge angles [9-10].
From this investigation, width of surface layer affected by machining was determined.
Online since: January 2012
Authors: Ahmet Koyun, Duygu Ceylan Erdogan, Esma Ahlatcioglu, Yeliz Koca Ipek
The defected structures have led to the poor mechanical properties and this cannot be tolerated.
This can affect negatively the mechanical properties of the composites.
Dynamic Mechanical properties of WPCs were measured by a Perkin Elmer DMA 8000.
Wood also can affect the product properties as the bulk density material [1].
Degradation of the fibers during processing may have a detrimental effect upon the mechanical properties of the composites.
This can affect negatively the mechanical properties of the composites.
Dynamic Mechanical properties of WPCs were measured by a Perkin Elmer DMA 8000.
Wood also can affect the product properties as the bulk density material [1].
Degradation of the fibers during processing may have a detrimental effect upon the mechanical properties of the composites.
Online since: October 2011
Authors: Qing Zhang, Zhong Qiu Liu
Then the model is applied to analyze lining structures of Jinping diversion tunnels during excavation and operation processes in which high external and internal water pressure would play a dominant role in affecting the behavior of lining respectively.
Coupling research are carried out to analyze some important factors that would influence the hydro-mechanical behavior of lining and surrounding rock mass such as decreased orders of hydraulic conductivity magnitude of grouting zone, internal water pressure acting as body force and existing cracks in the lining, and the results shows that grouting zone of good quality and sufficient measurement for preventing the cracks from initiation and coalescence in the lining are important for the construction and operation of the diversion tunnels.
With such high external and internal water pressure and concrete lining itself often has many micro-cracks for some construction factors.
Mechanical Constitutive Model of Concrete and Reinforcement.
Table 1: Material Properties for Coupled Analysis Material Dry Specific Weight Compression Strength Tensile Strength Initial Void Ratio Initial Hydraulic Conductivity Rock Mass 27.5 kN/m3 1.5e+05 kPa / 0.01 0.04 m/d Concrete 25.0 kN/m3 2.5e+04 kPa 2.17e+3kPa 0.005 0.0008 m/d Rebar 78.0 kN/m3 3.1e+05 kPa 3.1e+05 kPa / / Results Seepage from outside to inside.
Coupling research are carried out to analyze some important factors that would influence the hydro-mechanical behavior of lining and surrounding rock mass such as decreased orders of hydraulic conductivity magnitude of grouting zone, internal water pressure acting as body force and existing cracks in the lining, and the results shows that grouting zone of good quality and sufficient measurement for preventing the cracks from initiation and coalescence in the lining are important for the construction and operation of the diversion tunnels.
With such high external and internal water pressure and concrete lining itself often has many micro-cracks for some construction factors.
Mechanical Constitutive Model of Concrete and Reinforcement.
Table 1: Material Properties for Coupled Analysis Material Dry Specific Weight Compression Strength Tensile Strength Initial Void Ratio Initial Hydraulic Conductivity Rock Mass 27.5 kN/m3 1.5e+05 kPa / 0.01 0.04 m/d Concrete 25.0 kN/m3 2.5e+04 kPa 2.17e+3kPa 0.005 0.0008 m/d Rebar 78.0 kN/m3 3.1e+05 kPa 3.1e+05 kPa / / Results Seepage from outside to inside.
Online since: September 2014
Authors: Xiu Guang Song, Si Feng Zhang, Lin Li, Xue Feng Chen
Based on the summary and analysis of such aspects as the factors that influence durability of corroded steel bar and the impact of corroded steel bar on mechanical properties and fatigue durability of steel bar and structure, the objective which needed to be further researched was seek out to provide reference for later study.
Mechanical properties of corrosion-damaged reinforcement.
Experimental study on mechanical properties of corroded steel bars.
Experimental study on mechanical properties of corroded steel bars under high strain rate.
Digital test study of Corroded steel bar mechanical properties.
Mechanical properties of corrosion-damaged reinforcement.
Experimental study on mechanical properties of corroded steel bars.
Experimental study on mechanical properties of corroded steel bars under high strain rate.
Digital test study of Corroded steel bar mechanical properties.
Online since: July 2011
Authors: Yue Zhen Jiang, Xing Kai Duan
Thermoelectric Properties.
Low dimensional Bi2Te3-based materials, which show special quantum confinement effect and transport properties [4], have been proved to be an effective route to improve thermoelectric properties [5,6].
Annealing effect on thermoelectric properties was examined in high vacuum of 2×10-4 Pa at 373-573 K for 1 h.
The antistructure defect concentration is directly related to carrier concentration, and it affects the electronic transport properties.
All these factors lead to a decrease of activation energy with increase of the annealing temperature.
Low dimensional Bi2Te3-based materials, which show special quantum confinement effect and transport properties [4], have been proved to be an effective route to improve thermoelectric properties [5,6].
Annealing effect on thermoelectric properties was examined in high vacuum of 2×10-4 Pa at 373-573 K for 1 h.
The antistructure defect concentration is directly related to carrier concentration, and it affects the electronic transport properties.
All these factors lead to a decrease of activation energy with increase of the annealing temperature.
Online since: January 2013
Authors: Tian Liang Wang, Jian Kun Liu, Han Yan
In recent years, at home and abroad has been beginning the study of how the freezing and thawing affect the soil mechanical properties, the study generally agreed that the freezing and thawing would cause the attenuation of the soil strength.
Su Qian etc. [4] thought that the soil physical and mechanical properties, such as the water content, density, cohesion, internal friction angle, was stabilized after 10 freezing and thawing cycles.
In this paper, base on the indoor silty soil test under the effect of freeze-thaw cycle, explores the impact of the freeze-thaw cycle on silty soil mechanical properties and analyses kinds of various factors, obtains some regular rules.
Physical-mechanical properties changes of Qinghai-Tibet clay due to cyclic freezing and thawing, Chinese journal of rock mechanics and engineering, 2005, 24(23), pp.4313-4319
Test on physico-mechanical properties of Qinghai—Tibet slope clay under freezing-thawing cycles, Chinese j. rock mechanics and engineering, 2008, 6(supplement1), pp.2990-2994
Su Qian etc. [4] thought that the soil physical and mechanical properties, such as the water content, density, cohesion, internal friction angle, was stabilized after 10 freezing and thawing cycles.
In this paper, base on the indoor silty soil test under the effect of freeze-thaw cycle, explores the impact of the freeze-thaw cycle on silty soil mechanical properties and analyses kinds of various factors, obtains some regular rules.
Physical-mechanical properties changes of Qinghai-Tibet clay due to cyclic freezing and thawing, Chinese journal of rock mechanics and engineering, 2005, 24(23), pp.4313-4319
Test on physico-mechanical properties of Qinghai—Tibet slope clay under freezing-thawing cycles, Chinese j. rock mechanics and engineering, 2008, 6(supplement1), pp.2990-2994
Online since: May 2011
Authors: Hui Niu
Based on comprehensive quality management theory, we have studied quality factors of fly ash high-performance concrete in construction, put forward the method of beforehand control, course control and afterwards control.
Raw material quality directly affects the new mixing concrete and hardening coagulation concrete properties, which is also the basis of high-performance concrete proportioning design.
Fly Ash Concrete Properties Affecting Factors Research Raw material selection and preliminary mixing ratio design.
The physical and mechanical properties of cement testing results see table 1.
The influence of fly ash content on the concrete mechanical property is shown in table4.
Raw material quality directly affects the new mixing concrete and hardening coagulation concrete properties, which is also the basis of high-performance concrete proportioning design.
Fly Ash Concrete Properties Affecting Factors Research Raw material selection and preliminary mixing ratio design.
The physical and mechanical properties of cement testing results see table 1.
The influence of fly ash content on the concrete mechanical property is shown in table4.
Online since: November 2011
Authors: Stavros Syngellakis, Ai Hui Wu, B. G. Mellor
Modelling boundary conditions for both thermal and stress analyses, was identified as a key factor affecting predictions of residual stresses and distortion.
Introduction Welding -induced residual stresses and distortions have been well recognised as vital factors affecting the performance of welded structures in many applications, especially in low-stress failures.
Song et al.[10] studied the effect of thermal material properties on the temperature history results and the mechanical material properties on the resulting von Mises stress.
The temperature history was seen to be influenced by thermal properties and stress by mechanical properties, however, the effect of thermal property variation on the final residual stress results was not examined.
Variation of thermal and mechanical properties with temperature is obtained and studied as a result of an extensive literature search.
Introduction Welding -induced residual stresses and distortions have been well recognised as vital factors affecting the performance of welded structures in many applications, especially in low-stress failures.
Song et al.[10] studied the effect of thermal material properties on the temperature history results and the mechanical material properties on the resulting von Mises stress.
The temperature history was seen to be influenced by thermal properties and stress by mechanical properties, however, the effect of thermal property variation on the final residual stress results was not examined.
Variation of thermal and mechanical properties with temperature is obtained and studied as a result of an extensive literature search.