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Online since: December 2017
Authors: A.G. Barbosa de Lima, R.Q. da Costa Melo
Factors affecting the fiber/matrix interfacial adhesion and physic-chemical and mechanical properties of vegetable fiber-reinforced polymer composites are also revealed.
Table 4 illustrate some mechanical properties of selected polymer.
In this chapter, factors that affect mechanical and others properties of vegetable fiber-reinforced polymer composites, such as, moisture absorption and temperature, are revealed and discussed.
Hui, Critical factors on manufacturing processes of natural fibre composites.
In : Characterization and Factors Affecting Fiber Properties, Editora.
Table 4 illustrate some mechanical properties of selected polymer.
In this chapter, factors that affect mechanical and others properties of vegetable fiber-reinforced polymer composites, such as, moisture absorption and temperature, are revealed and discussed.
Hui, Critical factors on manufacturing processes of natural fibre composites.
In : Characterization and Factors Affecting Fiber Properties, Editora.
Effect of Hot-Rolling Parameters on Microstructure and Mechanical Properties of 72LXA Steel Wire Rod
Online since: October 2012
Authors: Jun Chen, Jian Hua Zeng, Yi Chang Li, Zheng Zhou
,Ltd, Chengdu Sichuan 610303, China;
3 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China)
a zeng-jhua@263.com d foresttiger119@163.com
Key words: 72LXA steel wire rod; rolling; ferrite; cementite; mechanical property
Abstract: Effect of the laying head temperature and controlled cooling process on microstructure and mechanical properties of 72LXA wire rod were investigated.The results show that under the same cooling process,with the raising laying temperature and increasing sorbitizing rate and decreasing proeutectoid ferrite,the steel rod strength is improving,proeutectoid ferrite and sorbitizing rate are the critical impact factors on steel rod properties;indentifying cooling after perlite forming can restrain the dissolve of lamellar cementite;the mechanical properties of whole rod coil are improved by the proper rolling rate and air cooling.The high strength of 1050 MPa of steel rod was obtained,that shows the defined hot rolling process
can conform to the steel rod properties requirement.
Among the production process, controlled rolling and controlled cooling process is one of the key factors for steel wire rod to obtain ideal microstructure and excellent mechanical property.
Therefore, combining with the process parameters and by analyzing the microstructure and property of steel wire rod in different pass during and after rolling, factors affect the microstructure and property are discussed and a reasonable controlled rolling and controlled cooling process is make out after finding out the important and sensitive process parameters, which is the basis for qualified steel wire rod production.
Table 3 Mechanical properties of No.5 steel wire rod Number of samples 1 2 3 4 5 6 7 8 9 10 11 12 Tensile strength/MPa 1034 1033 1027 1043 1047 1055 1035 1037 1023 1034 1050 1044 Conclusions 1) Under the same cooling process,with the raising laying temperature and increasing sorbitizing rate and decreasing proeutectoid ferrite,the steel rod strength is improving,proeutectoid ferrite and sorbitizing rate are the critical impact factors on steel rod properties. 2) At the present production condition, steel wire rod with the strength is over 1050 MPa is obtained by choosing contolled rolling and controlled cooling process correctly, and the microstructure uniformity and entirety property of the wire can be achieved by choosing reasonable roller speed and air distribution.
can conform to the steel rod properties requirement.
Among the production process, controlled rolling and controlled cooling process is one of the key factors for steel wire rod to obtain ideal microstructure and excellent mechanical property.
Therefore, combining with the process parameters and by analyzing the microstructure and property of steel wire rod in different pass during and after rolling, factors affect the microstructure and property are discussed and a reasonable controlled rolling and controlled cooling process is make out after finding out the important and sensitive process parameters, which is the basis for qualified steel wire rod production.
Table 3 Mechanical properties of No.5 steel wire rod Number of samples 1 2 3 4 5 6 7 8 9 10 11 12 Tensile strength/MPa 1034 1033 1027 1043 1047 1055 1035 1037 1023 1034 1050 1044 Conclusions 1) Under the same cooling process,with the raising laying temperature and increasing sorbitizing rate and decreasing proeutectoid ferrite,the steel rod strength is improving,proeutectoid ferrite and sorbitizing rate are the critical impact factors on steel rod properties. 2) At the present production condition, steel wire rod with the strength is over 1050 MPa is obtained by choosing contolled rolling and controlled cooling process correctly, and the microstructure uniformity and entirety property of the wire can be achieved by choosing reasonable roller speed and air distribution.
Online since: May 2006
Authors: Fernando A. Costa Oliveira, Jorge Cruz Fernandes, Diamantino Dias, Joaquim Domingues, Sandra Tavares
In the present work, the Taguchi method was used to evaluate the effect of
four processing parameters on the mechanical properties of a commercial dense cordierite in order
to maximize the flexural strength of the resulting bodies.
The type of alumina had a negligible effect on flexural strength whereas the other factors affect considerably the strength.
However, there is a need to improve the mechanical properties of cordierite ceramics, as low strength limits the loads that can be applied to these materials.
Many factors, including raw materials, processing parameters and component design, can affect the mechanical behaviour.
[5] Advanced technical ceramics - Monolithic ceramics - Mechanical properties at room temperature - Part 1: Determination of flexural strength, EN 843-1, Comité Européen de Normalisation, Brussels, Belgium, 1995.
The type of alumina had a negligible effect on flexural strength whereas the other factors affect considerably the strength.
However, there is a need to improve the mechanical properties of cordierite ceramics, as low strength limits the loads that can be applied to these materials.
Many factors, including raw materials, processing parameters and component design, can affect the mechanical behaviour.
[5] Advanced technical ceramics - Monolithic ceramics - Mechanical properties at room temperature - Part 1: Determination of flexural strength, EN 843-1, Comité Européen de Normalisation, Brussels, Belgium, 1995.
Online since: February 2018
Authors: Yuan Hua Lin, Zheng Wei Peng, Xiao Hong Wang, Gao Xu Li, Hai Lun Wang
The test results of mechanical properties show that the extruded texture will affects the mechanical properties of material.
Results and Discussion Effect of Texture on Mechanical Properties.
The experimental results show that the extruded texture can affect the mechanical properties of 2A12T4, and extruded texture makes the mechanical properties of 2A12T4 in the extrusion direction(ED) are better than those in the transverse direction(TD).
At the same time, the results of mechanical performance tests show that the extruded texture can affect the mechanical properties of 2A12T4, and extruded texture makes the mechanical properties of 2A12T4 in the extrusion direction(ED) are better than those in the transverse direction(TD)
Saito, Mechanical properties of Mg–Al–Zn alloy with a tilted basal texture obtained by differential speed rolling, Materials Science & Engineering A. 488 (2008) 214-220
Results and Discussion Effect of Texture on Mechanical Properties.
The experimental results show that the extruded texture can affect the mechanical properties of 2A12T4, and extruded texture makes the mechanical properties of 2A12T4 in the extrusion direction(ED) are better than those in the transverse direction(TD).
At the same time, the results of mechanical performance tests show that the extruded texture can affect the mechanical properties of 2A12T4, and extruded texture makes the mechanical properties of 2A12T4 in the extrusion direction(ED) are better than those in the transverse direction(TD)
Saito, Mechanical properties of Mg–Al–Zn alloy with a tilted basal texture obtained by differential speed rolling, Materials Science & Engineering A. 488 (2008) 214-220
Online since: May 2015
Authors: Yeong Sant Kuo
Of these thermal factors, the cooling rate is influenced by different process variables that affect the feeding behavior of the castings during solidification.
It is accepted by most of the researchers that the faster the cooling rate, the better the mechanical properties of the castings. [3] However, the faster cooling rate also caused insufficient feeding in casting, which will affect mechanical property of castings.
That maybe caused by some other factors.
Berry, A Re-examination of factors affecting porosity gradients in unidirectionally solidified samples, AFS Trans. 116 (2008)157-168
Smaliuskas, A.Petro, R.A.Flinn, Variable affecting chromite sand performance in molds, AFS Trans. 88 (1980) 683-694
It is accepted by most of the researchers that the faster the cooling rate, the better the mechanical properties of the castings. [3] However, the faster cooling rate also caused insufficient feeding in casting, which will affect mechanical property of castings.
That maybe caused by some other factors.
Berry, A Re-examination of factors affecting porosity gradients in unidirectionally solidified samples, AFS Trans. 116 (2008)157-168
Smaliuskas, A.Petro, R.A.Flinn, Variable affecting chromite sand performance in molds, AFS Trans. 88 (1980) 683-694
Online since: May 2011
Authors: Yu Liu, Xiao Dong Zhu, Feng Hu Wang
Effect of Processing Parameters on Properties of Wheat-straw Boards with FRW
Xiaodong Zhua, Fenghu Wangb and Yu Liuc, *
Key laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University Harbin, China
apse4646@126.coml, bfenghuwa@hotmail.com, c liuyu820524@126.com
Keywords: Wheat-straw boards, fire-retardant of wood, physical and mechanical properties, fire retardant property
Abstract.
The content of MDI, UF and FRW were selected to investigate the effect of addition content on the physical and mechanical property and fire retardant properties of boards.
Table1 Factors and levels of orthogonal test Level MDI (%) UF (%) FRW (%) 1 2 8 4 2 3 7 7 3 4 6 10 UF and MDI resin were applied to the rice-straw and FRW in a drum blender by using a compressed air spray head.
Results and Discussion Effect of technological factors on physical and mechanical property.The physical and mechanical property of rice-straw boards was shown in Table2.
Except 2hTS, other properties were higher than nation standard of China.
The content of MDI, UF and FRW were selected to investigate the effect of addition content on the physical and mechanical property and fire retardant properties of boards.
Table1 Factors and levels of orthogonal test Level MDI (%) UF (%) FRW (%) 1 2 8 4 2 3 7 7 3 4 6 10 UF and MDI resin were applied to the rice-straw and FRW in a drum blender by using a compressed air spray head.
Results and Discussion Effect of technological factors on physical and mechanical property.The physical and mechanical property of rice-straw boards was shown in Table2.
Except 2hTS, other properties were higher than nation standard of China.
Online since: February 2022
Authors: Sawinee Sangsuriyun, Montri Sangsuriyun
Correlation analysis of HI, mechanical properties and optimization plot revealed the optimum HI of 363 J/mm, and the verification by fatigue testing showed the optimum load cycle of 106 Nf.
The studies have shown that the welding process results in heat-affected zones (HAZ), changes in metallurgical structure and mechanical properties with residual stress in the specimens.
The effects of welding parameters on mechanical properties of FT-1, FT-2, …, and FT-5 specimens were studied using Universal Testing Machine WAW-600E.
Fig. 5 Stress-strain curve Fatigue Test and Statistical Analysis of Factors Affecting the Welding Process.
This result is consistent with analysis by DOE to calculate optimal values for parameters of factors affecting current, voltage, and frequency at a significance level of 0.05.
The studies have shown that the welding process results in heat-affected zones (HAZ), changes in metallurgical structure and mechanical properties with residual stress in the specimens.
The effects of welding parameters on mechanical properties of FT-1, FT-2, …, and FT-5 specimens were studied using Universal Testing Machine WAW-600E.
Fig. 5 Stress-strain curve Fatigue Test and Statistical Analysis of Factors Affecting the Welding Process.
This result is consistent with analysis by DOE to calculate optimal values for parameters of factors affecting current, voltage, and frequency at a significance level of 0.05.
Analysis of Factors Influencing on Compaction Performance of Hot Asphalt Mixtures by Orthogonal Test
Online since: July 2012
Authors: Lan Ouyang
The compaction can directly affect the performance of asphalt pavement, while the mixing temperature, the molding temperature, the temperature of aggregates and the rolling times can all affect the compaction performance.
The L9(34) orthogonal tests and indoor tests were used to analyze the influence of the main factors on the examination indicators.
The results show that molding temperature have a significant effect on the physical and mechanical properties of SMA13 asphalt mixtures when the confidence level α is 0.10.
In Table 4, it can be seen that when α = 0.10, the compaction temperature has a significant effect on the porosity of the asphalt mixture, which may be consider as the main factors while other factors have no significant impact.
Laboratory Study of the Effects of Compaction on the Volumetric and Rutting Properties of CRM Asphalt Mixtures [J].
The L9(34) orthogonal tests and indoor tests were used to analyze the influence of the main factors on the examination indicators.
The results show that molding temperature have a significant effect on the physical and mechanical properties of SMA13 asphalt mixtures when the confidence level α is 0.10.
In Table 4, it can be seen that when α = 0.10, the compaction temperature has a significant effect on the porosity of the asphalt mixture, which may be consider as the main factors while other factors have no significant impact.
Laboratory Study of the Effects of Compaction on the Volumetric and Rutting Properties of CRM Asphalt Mixtures [J].
Research on the Impact of Increase Pressure on the Homogeneity of the Cast in Die Casting Technology
Online since: February 2015
Authors: Stefan Gaspar, Jan Pasko, Slavko Pavlenko
The presented paper deals with the experimental assessment of the impact of increase pressure on the mechanical properties and homogeneity of a die cast.
When the experiment has been carried out constant and variable technological factors have been determined and the impact of these factors on the values of mechanical properties has been observed: Constant technological factors: § plunger pressing speed: 2,6 m.s-1, § liquid alloy temperature: 705°C, § mold temperature: 200°C, § pressing chamber diameter: 70 mm.
Variable technological factors: § increase pressure: 13; 22; 25 MPa.
Table 2 The measured mechanical properties values in dependence on the increase pressure ALTERNATOR FLANGE Permanent deformation „s“ [mm] Sample No.
Table 3 The measured mechanical properties values in dependence on the increase pressure TESTING BAR Ultimate tensile strength „UTS“ [MPa] Sample No.
When the experiment has been carried out constant and variable technological factors have been determined and the impact of these factors on the values of mechanical properties has been observed: Constant technological factors: § plunger pressing speed: 2,6 m.s-1, § liquid alloy temperature: 705°C, § mold temperature: 200°C, § pressing chamber diameter: 70 mm.
Variable technological factors: § increase pressure: 13; 22; 25 MPa.
Table 2 The measured mechanical properties values in dependence on the increase pressure ALTERNATOR FLANGE Permanent deformation „s“ [mm] Sample No.
Table 3 The measured mechanical properties values in dependence on the increase pressure TESTING BAR Ultimate tensile strength „UTS“ [MPa] Sample No.
Online since: April 2024
Authors: Veli Fataliyev, Alesker Aliyev, Sevda Aliyeva
The study of technological factors affecting the aging and performance of pumpjack helps to optimize maintenance processes and prevent unexpected breakdowns, which leads to lower operating costs.
Changes in the properties of the produced fluid, such as viscosity and temperature, can affect the loading of the pump's mechanical components and increase the risk of corrosion.
For this, the properties of the fluid must be monitored, measures must be taken to manage the variations, for example, the pump parameters must be adjusted accordingly.
Incomplete filling of the cylinder, due to two factors.
Conclusion It has been determined that the factors affecting the pump flow ratio in the petroleum industry include deformation of the rod string and tubing column, fluid compression, incomplete cylinder filling, and leaks in valves and plunger pair.
Changes in the properties of the produced fluid, such as viscosity and temperature, can affect the loading of the pump's mechanical components and increase the risk of corrosion.
For this, the properties of the fluid must be monitored, measures must be taken to manage the variations, for example, the pump parameters must be adjusted accordingly.
Incomplete filling of the cylinder, due to two factors.
Conclusion It has been determined that the factors affecting the pump flow ratio in the petroleum industry include deformation of the rod string and tubing column, fluid compression, incomplete cylinder filling, and leaks in valves and plunger pair.