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Online since: January 2018
Authors: Lucas Marcello Godinho, Sylma Carvalho Maestrelli, Déborah Caroline de Oliveira, Ana Gabriela Storion, Patrícia Neves Mendes
According to the variance analysis, there were some differences between the treatments for all properties analyzed and, by the regression analysis, optimum peat levels were found for all properties analyzed, for some properties these levels were considered inadequate for being superior to the limit stablished.
Clays with low plasticity can be used for the production of ceramic filters, whose porosity is a consequence of the addition of peat, which affects the final properties of the product such as mechanical strength, density, linear shrinkage and water absorption.
As porosity increases, the value of mechanical strength tends to decrease, and it is essential to find a value for which both properties show satisfactory results.
With this content, it would be achieved a great mechanical resistance, however, other properties would be compromised, such as porosity (which would be very low), making it impossible to be used as filters.
Among the optimum levels found, it was not possible to determine a value that acted positively to all properties, because it was observed that a content caused improvements for certain properties as affected negatively the remaining properties.
Clays with low plasticity can be used for the production of ceramic filters, whose porosity is a consequence of the addition of peat, which affects the final properties of the product such as mechanical strength, density, linear shrinkage and water absorption.
As porosity increases, the value of mechanical strength tends to decrease, and it is essential to find a value for which both properties show satisfactory results.
With this content, it would be achieved a great mechanical resistance, however, other properties would be compromised, such as porosity (which would be very low), making it impossible to be used as filters.
Among the optimum levels found, it was not possible to determine a value that acted positively to all properties, because it was observed that a content caused improvements for certain properties as affected negatively the remaining properties.
Online since: July 2015
Authors: I. Made Agus Ariawan, B.S. Subagio, B.H. Setiadji
Environmental and climatic factors directly affect the temperature of asphalt pavement layers.
Air temperature is one of the most important environmental factors that significantly affect the temperature distribution profile of asphalt pavement layers.
Air temperature is one of the most important environmental factors for which influencing the mechanical properties of asphalt mixtures [3].
Climatic factors consisting air temperature and humidity are interrelated and opposite to each other.
Asphalt pavement temperature profile is significantly associated with climatic factors.
Air temperature is one of the most important environmental factors that significantly affect the temperature distribution profile of asphalt pavement layers.
Air temperature is one of the most important environmental factors for which influencing the mechanical properties of asphalt mixtures [3].
Climatic factors consisting air temperature and humidity are interrelated and opposite to each other.
Asphalt pavement temperature profile is significantly associated with climatic factors.
Online since: February 2012
Authors: Shi Long Zhang, Jian Gao, Jian Zhong Wang
The result shows that: both kinds of springs can meet the design requirements in maximum work force and fatigue, but the new spring are significantly lighter compared with the traditional invariable diameter, and the mechanical properties of material of the new spring are more fully played.
For the springs of various applications, their demesions, material properties and manufacturing process are all of great difference from each other.
Second, the maximum stress of variable diameter spring is larger than the invariable one, but the mechanical properties of spring wire is more fully played on the former one, and the overall force status of spring has also been improved.
This is one of the main forms of spring failure[8][9], so it is essential to test the new spring’s fatigue properties.
The stress of the variable diameter spring is distributed more uniformly and the mechanical properties of spring wire material are more fully played.
For the springs of various applications, their demesions, material properties and manufacturing process are all of great difference from each other.
Second, the maximum stress of variable diameter spring is larger than the invariable one, but the mechanical properties of spring wire is more fully played on the former one, and the overall force status of spring has also been improved.
This is one of the main forms of spring failure[8][9], so it is essential to test the new spring’s fatigue properties.
The stress of the variable diameter spring is distributed more uniformly and the mechanical properties of spring wire material are more fully played.
Online since: August 2012
Authors: Hui Hui Zhao, Zi Qiang Yin, Guang Jun Zhang, Chuan Bao Jia, Ning Guo
It is indicated that surface smoothness is a critical factor to affects the performance of RP & M products.
Many researches and experiments indicate that surface smoothness is the critical factor of rapid prototyping to affect its density, mechanical properties and stability of successive stack layer by layer [2-10].
Experiment Setup There are mainly five factors affect rapid prototyping based on welding, including welding current (I), arc voltage (U), Contact tip to workpiece distance (CTWD) (L), wire feed rate (Vf) and travel speed (V) .
Experiment and Result Experiments design the quadric regression function of this experiment system: (1) There are three factors in this experimental system.
Processings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture 215, pp. 1519-1527
Many researches and experiments indicate that surface smoothness is the critical factor of rapid prototyping to affect its density, mechanical properties and stability of successive stack layer by layer [2-10].
Experiment Setup There are mainly five factors affect rapid prototyping based on welding, including welding current (I), arc voltage (U), Contact tip to workpiece distance (CTWD) (L), wire feed rate (Vf) and travel speed (V) .
Experiment and Result Experiments design the quadric regression function of this experiment system: (1) There are three factors in this experimental system.
Processings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture 215, pp. 1519-1527
Online since: May 2014
Authors: Shuai Yan, Meng Hua Wu, Zhi Ning, Yuan Gang Wang
Fig. 1 The schematic diagram of the Fe-ZrO2 binary Nano composite coatings deposition system
(1 the cathode 2 the anode 3 pulse power 4 electric blender5 plating tank 6 supporting network
7 ultrasonic medium 8 Ultrasonic generator)
1.3 Substrate pretreatment
Electrodeposition experiment is an important aspects must be kept in the nature of the substrate surface, thus ensuring the adhesion strength of the coating and substrate, to prevent the occurrence of because of substrate pretreatment coating problem caused by the coating quality problem such as peeling, minimize non-technical factors affecting the quality of coating on the surface, so need to combine the properties of the matrix on the corresponding and necessary before processing [13].
1.4 Composite plating solution composition and preparation process
This research adopts the composite plating solution of main salt for Fecl2·4H2O; With NaCl and H3BO3 as additional main salt; H3BO3 as buffer; With CH3(CH2)11OSO3Na as wetting
The size of the range reflects the factors to select the size of the changes in the level of impact on the indicators.
Fig. 2 Effects of each factor on the ZrO2 content of Fe-ZrO2 Nano composite coatings In table 5 and the factors of nanometer ZrO2 content in the composite coating influence diagram analysis, four factors of optimal level values A3B4C2D2 respectively.
Research of Influencing Factors on Performance and ProcessOptimization of Ceramic Coating[J].
Ultrasonic electrodeposition Ni-TiN microstructure and mechanical properties of composite coating research [J].
The size of the range reflects the factors to select the size of the changes in the level of impact on the indicators.
Fig. 2 Effects of each factor on the ZrO2 content of Fe-ZrO2 Nano composite coatings In table 5 and the factors of nanometer ZrO2 content in the composite coating influence diagram analysis, four factors of optimal level values A3B4C2D2 respectively.
Research of Influencing Factors on Performance and ProcessOptimization of Ceramic Coating[J].
Ultrasonic electrodeposition Ni-TiN microstructure and mechanical properties of composite coating research [J].
Online since: December 2007
Authors: Orhan Çakır
Their wide applications are due to
their excellent electrical and thermal conductivity, ease of fabrication, good strength and fatigue
properties.
There are several factors contributing to the popularity of wet etching processes as follows [3]: a.
Their wide use is due to their excellent electrical and thermal conductivity, ease of fabrication, coupled with good strength and fatigue properties.
Compositions and properties of copper and copper alloys can be varied to suit many requirements.
Therefore various studies carried out to investigate the parameters affecting production outputs.
There are several factors contributing to the popularity of wet etching processes as follows [3]: a.
Their wide use is due to their excellent electrical and thermal conductivity, ease of fabrication, coupled with good strength and fatigue properties.
Compositions and properties of copper and copper alloys can be varied to suit many requirements.
Therefore various studies carried out to investigate the parameters affecting production outputs.
Online since: March 2011
Authors: Xin Kun Zhu, H.L. Tang, T.L. Chen, Jing Mei Tao, Cai Ju Li
The preparation, mechanical properties, grain size and thermal property of bulk nanocrystalline Cu (BNC-Cu) were investigated in this paper.
However, many properties and related mechanisms of nanocrytalline materials are also not understood, especially the mechanical properties and related deformation mechanism of nanocrystalline materials, which are mainly caused by the lack of bulk nanocrystalline materials with 100% theoretical density.
The preparation, mechanical properties, grain size and thermal property of BNC-Cu were investigated in this paper.
The minimum grain size of Cu and the relationship between the grain size and ball milling time are related to many factors in the ball milling system, such as ball milling energy, physical properties of elemental metals and ball milling temperature.
In the process of ball milling, the hardness of Cu is synchronously affected by hardening effect and softening effect.
However, many properties and related mechanisms of nanocrytalline materials are also not understood, especially the mechanical properties and related deformation mechanism of nanocrystalline materials, which are mainly caused by the lack of bulk nanocrystalline materials with 100% theoretical density.
The preparation, mechanical properties, grain size and thermal property of BNC-Cu were investigated in this paper.
The minimum grain size of Cu and the relationship between the grain size and ball milling time are related to many factors in the ball milling system, such as ball milling energy, physical properties of elemental metals and ball milling temperature.
In the process of ball milling, the hardness of Cu is synchronously affected by hardening effect and softening effect.
Online since: October 2010
Authors: Liang Zuo, Feng Hui An, Fang Zhang, Ying Li, Yu Hui Sha
The obtained results showed that the depleted area around primary MnS particles affects significantly the distribution of strain-induced MnS particles, and the involved parameters were discussed.
Its excellent magnetic property comes from the sharp Goss texture developed by secondary recrystallization process.
In Fe-3%Si steel, the solute depleted area around MnS particles precipitated earlier will inevitably affect the distribution of MnS.
Compression test was carried out on Gleeble-1500 thermo-mechanical system in argon atmosphere.
In addition to the size of solute depleted area, the shape of solute depleted area also affects the distribution of strain-induced MnS particles.
Its excellent magnetic property comes from the sharp Goss texture developed by secondary recrystallization process.
In Fe-3%Si steel, the solute depleted area around MnS particles precipitated earlier will inevitably affect the distribution of MnS.
Compression test was carried out on Gleeble-1500 thermo-mechanical system in argon atmosphere.
In addition to the size of solute depleted area, the shape of solute depleted area also affects the distribution of strain-induced MnS particles.
Online since: May 2014
Authors: Meng Meng Zhou, Ling Ling Ma, Fei Cao, Jing Du, Ji Jun Xiao
The properties of the polyurethane were characterized by Fourier Transform Infrared Spectroscopy(FTIR), thermal gravimetric analysis(TGA), dynamic mechanical thermal analysis(DMA) and electronic universal testing machine.
The aim of this work is synthesize the one-component moisture-cure polyurethane adhesive and discussed the effect of NCO/OH ratio on the mechanical properties.
Fig.3 TGA of moisture-cure polyurethane Fig.4 DMA of moisture-cure polyurethane Effect of NCO/OH ratio on mechanical properties of moisture-cure polyurethane film.
The factors of NCO/OH ratio has seriously influenced the ability of adhesives.
Table 1 NCO/OH ratio effect on the mechanical properties of film NCO/OH Tensile strength/MPa elongation at break/MPa hardness/Shore A 2.98 65.28 67.28 95 3.29 77.05 67.82 99 3.71 91.07 105.9 100 4.03 92.92 99.70 97.5 4.43 78.05 86.04 96 The influence of NCO/OH on mechanical properties of bonded wood by moisture-cure polyurethane.
The aim of this work is synthesize the one-component moisture-cure polyurethane adhesive and discussed the effect of NCO/OH ratio on the mechanical properties.
Fig.3 TGA of moisture-cure polyurethane Fig.4 DMA of moisture-cure polyurethane Effect of NCO/OH ratio on mechanical properties of moisture-cure polyurethane film.
The factors of NCO/OH ratio has seriously influenced the ability of adhesives.
Table 1 NCO/OH ratio effect on the mechanical properties of film NCO/OH Tensile strength/MPa elongation at break/MPa hardness/Shore A 2.98 65.28 67.28 95 3.29 77.05 67.82 99 3.71 91.07 105.9 100 4.03 92.92 99.70 97.5 4.43 78.05 86.04 96 The influence of NCO/OH on mechanical properties of bonded wood by moisture-cure polyurethane.
Online since: November 2010
Authors: Feng Qing Zhao, Jun Qin Liu, Hao Li, Qian Li
Often trail and error process is adopted to achieve foamed concrete with desired properties.
Results and analysis Factors and their levels affecting compressive strength and density of formed concrete were decided on initial investigation and experience.
The quantity of cementing material shows most significant effect on mechanical strength among the three factors.
Structure and Properties of aerated Concrete: a review.
Influence of filler type on the properties of foam concrete.
Results and analysis Factors and their levels affecting compressive strength and density of formed concrete were decided on initial investigation and experience.
The quantity of cementing material shows most significant effect on mechanical strength among the three factors.
Structure and Properties of aerated Concrete: a review.
Influence of filler type on the properties of foam concrete.