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Online since: March 2011
Authors: Yue Sun, Sheng Ling Xiao
The resin content is one of the most important factor on which has a direct impact on physical and mechanical properties of the railway sleeper[2].
Fig.1: Schematic diagram of hot curves 1.3.2 Physical and mechanical properties testing Reference to the provisions of the detection method, it uses universal mechanical testing machine, SANS computer control electronic universal testing machine to test physical and mechanical properties of composite materials[6]. 1.3.3 Data Analysis Analysis of experimental data by using DPS data processing system,it studies the significance of impact of various factors on the indicators when significant level is at 0.05 such as α=0.05. 2.
Testing the impact of resin content on the physical and mechanical properties of composite materials.
No. physical and mechanical properties regression equation Correlation coefficient 1 2h TS Y=0.09X2-2.691X+29.6965 r=0.9994 2 MOR Y=-1.7467X2+38.61X-155.7859 r=0.9992 3 IB Y=-0.015089X2+0.400936X-1.891 r=0.9992 Fig.2: Regression curve on resin content and physical and mechanical properties(2h TS,MOR,IB) 3.
The preparation of the physical and mechanical properties in my research meets or exceeds the relevant national standards.
Fig.1: Schematic diagram of hot curves 1.3.2 Physical and mechanical properties testing Reference to the provisions of the detection method, it uses universal mechanical testing machine, SANS computer control electronic universal testing machine to test physical and mechanical properties of composite materials[6]. 1.3.3 Data Analysis Analysis of experimental data by using DPS data processing system,it studies the significance of impact of various factors on the indicators when significant level is at 0.05 such as α=0.05. 2.
Testing the impact of resin content on the physical and mechanical properties of composite materials.
No. physical and mechanical properties regression equation Correlation coefficient 1 2h TS Y=0.09X2-2.691X+29.6965 r=0.9994 2 MOR Y=-1.7467X2+38.61X-155.7859 r=0.9992 3 IB Y=-0.015089X2+0.400936X-1.891 r=0.9992 Fig.2: Regression curve on resin content and physical and mechanical properties(2h TS,MOR,IB) 3.
The preparation of the physical and mechanical properties in my research meets or exceeds the relevant national standards.
Online since: December 2018
Authors: Si Hai Jiao, Suo Quan Zhang, Jian Hua Ding, Qing Feng Zhang, Hong Sheng Jiang
The results show that the mechanical properties of the steel, especially the uniform elongation of the steel plate, are important factors affecting the shear crack.
The aim of this work is to verify the effect of the mechanical properties of the material on the shear crack, especially the uniform elongation.
These properties were determined experimentally for steel A and steel B.
Effect of direct quenching on microstructure and mechanical properties of medium-carbon Nb-bearing steel, Journal of Zhejiang University-SCIENCE A. 11(2010) 776-781
Microstructure and Mechanical Properties of 780MPa High Strength Steels Produced by Direct Quenching and Tempering Process, Journal of Material Science. 37( 2002) 1973
The aim of this work is to verify the effect of the mechanical properties of the material on the shear crack, especially the uniform elongation.
These properties were determined experimentally for steel A and steel B.
Effect of direct quenching on microstructure and mechanical properties of medium-carbon Nb-bearing steel, Journal of Zhejiang University-SCIENCE A. 11(2010) 776-781
Microstructure and Mechanical Properties of 780MPa High Strength Steels Produced by Direct Quenching and Tempering Process, Journal of Material Science. 37( 2002) 1973
Online since: December 2016
Authors: Robert Černý, Eva Vejmelková, Monika Čáchová, Jaroslava Koťátková, Dana Koňáková
They were studied in the means of basic physical properties, mechanical properties, water transport properties and water vapour transport properties.
The transport of water or water vapour through the material affects many other properties such as thermal and mechanical properties, resistance to frost and aggressive substances, which can be dissolved in water (such as sulphates, chlorides, etc.) or in the form of gaseous pollutants [1, 2].
Water transport properties.
Figure 3 shows the mechanical properties of the studied plasters.
Fig. 3 Mechanical properties of studied plasters.
The transport of water or water vapour through the material affects many other properties such as thermal and mechanical properties, resistance to frost and aggressive substances, which can be dissolved in water (such as sulphates, chlorides, etc.) or in the form of gaseous pollutants [1, 2].
Water transport properties.
Figure 3 shows the mechanical properties of the studied plasters.
Fig. 3 Mechanical properties of studied plasters.
Online since: July 2011
Authors: Ke Yong Tang, Hui Jun Song
Increasing the plasticizer content decreases the tension strength and increases the elongation at break of the samples, and the type and amount of the plasticizers affect the mechanical properties of the composite films.
The use of packaging materials may prolong the shelf life of a food by seperating it from various deterioration factors [1].
Mechanical Properties Experiment.
The mechanical properties of gelatin-chitosan composite films may be affected by the types and amounts of plasticizers in them.
Conclusions The types and amounts of plasticizers affect the moisture sorption and mechanical properties of gelatin-chitosan composite films.
The use of packaging materials may prolong the shelf life of a food by seperating it from various deterioration factors [1].
Mechanical Properties Experiment.
The mechanical properties of gelatin-chitosan composite films may be affected by the types and amounts of plasticizers in them.
Conclusions The types and amounts of plasticizers affect the moisture sorption and mechanical properties of gelatin-chitosan composite films.
Online since: July 2013
Authors: Chun Ling Xin, Ya Dong He, He Hai Song
The mechanical properties of composites were greatly affected by the temperature of barrel.
The length of residual glass fiber was not directly corresponding with the mechanical properties.
The results of mechanical properties are also shown in Table 3 and the analysis of mechanical properties was shown in figure2 and figure 3 respectively.
Fig.2 Effect of four factors on tensile and flexural strength Fig.3 Effect of four factors on impact resistance The optimal choice of pellets’ length was 10mm (A2) for the highest mechanical properties of composites.
Ultimately it leaded to defective products and decreased the mechanical properties.
The length of residual glass fiber was not directly corresponding with the mechanical properties.
The results of mechanical properties are also shown in Table 3 and the analysis of mechanical properties was shown in figure2 and figure 3 respectively.
Fig.2 Effect of four factors on tensile and flexural strength Fig.3 Effect of four factors on impact resistance The optimal choice of pellets’ length was 10mm (A2) for the highest mechanical properties of composites.
Ultimately it leaded to defective products and decreased the mechanical properties.
Online since: August 2016
Authors: Chaiwute Vudjung
Cure and mechanical properties of natural rubber filled bacterial cellulose
Chaiwute Vudjung
Laboratory of Advanced Polymer and Rubber Materials (LAPRM)
Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190 Thailand
Email: chaiwute2110@gmail.com, scchaivu@ubu.ac.th
Keywords: Natural rubber, Bacterial cellulose, Cure properties, Mechanical Properties
Abstract.
Introduction Rubbers can’t be used in pure form due to their low mechanical properties.
The objective of this work was to study the cure and mechanical properties of NR filled BC with various amounts of BC.
Their cure and mechanical properties were characterized by Oscillating Disk Rheometer (ODR) and mechanical tests.
The effect of BC loading on mechanical properties of vulcanizates The influence of BC content on the mechanical properties of vulcanized natural rubber was investigated.
Introduction Rubbers can’t be used in pure form due to their low mechanical properties.
The objective of this work was to study the cure and mechanical properties of NR filled BC with various amounts of BC.
Their cure and mechanical properties were characterized by Oscillating Disk Rheometer (ODR) and mechanical tests.
The effect of BC loading on mechanical properties of vulcanizates The influence of BC content on the mechanical properties of vulcanized natural rubber was investigated.
Online since: February 2011
Authors: Li Li, Zuo Wei Zhong, Xiao Yan He, Yun Hong Hao
Fig.1 Specimen Fig.2 Mold Fig.3 Electronic Balance
Thickness and Density of the Coating Measurement
Thickness of the coating is assurance for internal quality of the coating, it directly affects the corrosion properties, stress and service life.
Hardness and elastic modulus of the material are most commonly used performance indicators in the mechanical properties.
Micron indenter test is an advanced technology to measure the mechanical properties of the materials surface, it uses micro-micron sharp indenter pressed into the coating surface, and real-time record the curve of pressure head relationship between stress and pressure deep, the mechanical properties of the material can be measured through this curve.
The method of determining contact stiffness approach is based on the slope of unloading curve, it can only get the maximum indentation at the mechanical properties.
There is plastic deformation during the measurement process, plastic deformation process corresponds to dislocation slip, micro-crack growth, and the local stress under great pressure head, these factors have impacts on the measurement results.
Hardness and elastic modulus of the material are most commonly used performance indicators in the mechanical properties.
Micron indenter test is an advanced technology to measure the mechanical properties of the materials surface, it uses micro-micron sharp indenter pressed into the coating surface, and real-time record the curve of pressure head relationship between stress and pressure deep, the mechanical properties of the material can be measured through this curve.
The method of determining contact stiffness approach is based on the slope of unloading curve, it can only get the maximum indentation at the mechanical properties.
There is plastic deformation during the measurement process, plastic deformation process corresponds to dislocation slip, micro-crack growth, and the local stress under great pressure head, these factors have impacts on the measurement results.
Online since: September 2016
Authors: Sherif Yehia, Sharef Farrag
One of the factors affecting properties of lightweight concrete (LWC) is the physical and mechanical properties of aggregates used [1].
Specific gravity factor, bulk density, and gradation are among several other properties that can alter expected performance.
In addition, several mechanical and physical properties of the LWA sources were evaluated and summarized in Table 2.
At this stage all mixes achieved the required mechanical properties for structural lightweight concrete.
It was found that exposure to the wet/dry cycles slightly affected the mechanical properties of the mix and the RCPT values.
Specific gravity factor, bulk density, and gradation are among several other properties that can alter expected performance.
In addition, several mechanical and physical properties of the LWA sources were evaluated and summarized in Table 2.
At this stage all mixes achieved the required mechanical properties for structural lightweight concrete.
It was found that exposure to the wet/dry cycles slightly affected the mechanical properties of the mix and the RCPT values.
Online since: May 2013
Authors: Yan Jun Sun, Zhen Fang Ma, Zhe Chen, Yan Bing Leng, Lian He Dong
The chemical compositions, mechanical characteristics of SiC and the factors which affect the polishing precision and quality are analyzed.
Fig.1 Schematic diagram of chemical mechanical polishing 3 Test conditions and parameters selection of polishing For SiC in chemical mechanical polishing process, polishing, polishing pad ratio selection, pressure and velocity determination which is to obtain high removal rate and high quality polished surface are important factors. 3.1 Polishing liquid and ratio Polishing liquid comprising water, polishing powder and some additives ( surface active agent, stabilizer, dispersing agent ) etc., that are suitable for polishing liquid can reach the chemical action and mechanical effect of the best effect, high polishing efficiency, good quality.
But the good fluidity, is not easy to precipitate or cake, due to its good suspension property and no toxicity.
dz/dt=KP(x,y,t)V(x, y, t) (2) In the formula, K is the constant of proportionality, by speed and pressure outside of the factors, such as polishing material, the material of the workpiece, and a polishing material, concentration, as well as environmental temperature, humidity.
Many factors affect the efficiency and quality of polishing processing.
Fig.1 Schematic diagram of chemical mechanical polishing 3 Test conditions and parameters selection of polishing For SiC in chemical mechanical polishing process, polishing, polishing pad ratio selection, pressure and velocity determination which is to obtain high removal rate and high quality polished surface are important factors. 3.1 Polishing liquid and ratio Polishing liquid comprising water, polishing powder and some additives ( surface active agent, stabilizer, dispersing agent ) etc., that are suitable for polishing liquid can reach the chemical action and mechanical effect of the best effect, high polishing efficiency, good quality.
But the good fluidity, is not easy to precipitate or cake, due to its good suspension property and no toxicity.
dz/dt=KP(x,y,t)V(x, y, t) (2) In the formula, K is the constant of proportionality, by speed and pressure outside of the factors, such as polishing material, the material of the workpiece, and a polishing material, concentration, as well as environmental temperature, humidity.
Many factors affect the efficiency and quality of polishing processing.
Online since: August 2013
Authors: Ying Ge Xu
Influence of the Temperature on the Mechanical Properties and Fracture Surfaces of 93WNiFe Alloy
yingge xu
School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology,Xi’an 710055,China; 11087266@qq.com
Keywords: 93WNiFe alloy; Mechanical Properties; Fracture surfaces
Abstract:The effect of temperature on the mechanical properties and fracture surfaces of 93WNiFe alloy was investigated in tension with temperature ranges from 10 to 900 degrees.
It is widely used in military science field, and it is manufactured the penetrators as the main materials at home and abroad because of a series of excellent mechanical properties, corrosion resistance and absorption ability of radioactivity substance.
The study of temperature how to affect the mechanical properties and fracture surfaces of 93WNiFe alloy was investigated in tension test with temperature ranges from 10 to 900 degrees.
This experiment tried to find out the reason that is the mechanical properties influenced by the temperature and the deformation of tungsten pellet and matrix.
(a) 10 ℃ (b) 200 ℃ (c) 500 ℃ (d) 700 ℃ Fig.2 Fracture surface of 93WNiFe alloy at different temperature The Ultimate strength of tungsten alloy(δb) is influenced by the following factors in relative microcosmic[5]: bonding phase strength(δM), tungsten particles cleavage strength(δW), tungsten particles and bonding phase release strength(δW-M), tungsten-tungsten particle separation strength(δW-W).
It is widely used in military science field, and it is manufactured the penetrators as the main materials at home and abroad because of a series of excellent mechanical properties, corrosion resistance and absorption ability of radioactivity substance.
The study of temperature how to affect the mechanical properties and fracture surfaces of 93WNiFe alloy was investigated in tension test with temperature ranges from 10 to 900 degrees.
This experiment tried to find out the reason that is the mechanical properties influenced by the temperature and the deformation of tungsten pellet and matrix.
(a) 10 ℃ (b) 200 ℃ (c) 500 ℃ (d) 700 ℃ Fig.2 Fracture surface of 93WNiFe alloy at different temperature The Ultimate strength of tungsten alloy(δb) is influenced by the following factors in relative microcosmic[5]: bonding phase strength(δM), tungsten particles cleavage strength(δW), tungsten particles and bonding phase release strength(δW-M), tungsten-tungsten particle separation strength(δW-W).