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Online since: March 2014
Authors: Gui Sheng Gan, Qian Gao, Huan Chun Wu, Bin Yang
Based on the experimental and calculation results between the reinforcing particles content and thermal physical parameters, low pressure die casting of wheels was taken as an example to study the casting property of the 7075 alloy and TiB2/7075 composites.
Numerical simulation has calculated the temperature field and stress field in mould filling and solidification process, defects and microstructure, which affected by the of gating system design and processing parameters, such as casting temperature, casting pressure, mold temperature.
The effect of grain refinement on the viscosity of composite depends on many factors of reinforced particle, such as itssize, shape, amount and even its agglomeration in the matrix[13].
Lu, Processing, microstructure and tensile properties of nano-sized Al2O3 particle reinforced aluminum matrix composites, J.
TorabiParizi, Comparison of microstructure and mechanical properties of A356 aluminum alloy/Al2O3 composites fabricated by stir and compo-casting processes, J.
Numerical simulation has calculated the temperature field and stress field in mould filling and solidification process, defects and microstructure, which affected by the of gating system design and processing parameters, such as casting temperature, casting pressure, mold temperature.
The effect of grain refinement on the viscosity of composite depends on many factors of reinforced particle, such as itssize, shape, amount and even its agglomeration in the matrix[13].
Lu, Processing, microstructure and tensile properties of nano-sized Al2O3 particle reinforced aluminum matrix composites, J.
TorabiParizi, Comparison of microstructure and mechanical properties of A356 aluminum alloy/Al2O3 composites fabricated by stir and compo-casting processes, J.
Online since: July 2015
Authors: Suksan Prombanpong, Jariyaporn Thangthong
On the contrary, changing acid concentration of the electrolyte solution will not obviously affect burn defect result.
When sulfuric acid is increasing, the percentage of burn defect is almost not affected.
Experimental factors between of ramp time and sulfuric acid concentration was found that the ramp time 480s and sulfuric acid concentration 200 g/l can reduce the burning of aluminum in the best Hard anodizing process.
Muller: Mechanical Properties at Nanometric Scale of Alumina Layers Formed in Sulphuric Acid Anodizing under Burning Conditions, Ceramics International, Vol. 38 (2012), p.1627–1633.
When sulfuric acid is increasing, the percentage of burn defect is almost not affected.
Experimental factors between of ramp time and sulfuric acid concentration was found that the ramp time 480s and sulfuric acid concentration 200 g/l can reduce the burning of aluminum in the best Hard anodizing process.
Muller: Mechanical Properties at Nanometric Scale of Alumina Layers Formed in Sulphuric Acid Anodizing under Burning Conditions, Ceramics International, Vol. 38 (2012), p.1627–1633.
Online since: January 2013
Authors: Yuan Wang, Hua Jin, Li Jie Ouyang
Besides, there are some other influence factors such as artificial measurement error, statistical error and dynamic randomness, etc.
Taking advantage of the KFM or the EKF, a few scholars have been researching Back analysis of mechanical parameters [5-8] and deformation [9,10].
and are white noise sequences with the following statistical properties: , , (3) , , (4)
While, the initial values, and, affect filtering efficiency.
Additionally, initial value greatly affects convergence and computing speed, which implies an open issue in the future that how to choose an acceptable initial value in practical engineering.
Taking advantage of the KFM or the EKF, a few scholars have been researching Back analysis of mechanical parameters [5-8] and deformation [9,10].
and are white noise sequences with the following statistical properties: , , (3) , , (4)
While, the initial values, and, affect filtering efficiency.
Additionally, initial value greatly affects convergence and computing speed, which implies an open issue in the future that how to choose an acceptable initial value in practical engineering.
Online since: July 2011
Authors: Kazunori Fujikake, Takashi Fukuda, Shotaro Sanuki, Masaki Miyakawa
It is noted that the resistance and behavior of a RC beam failing in shear under static loading significantly depends on many factors, such as the shape and size and the structural restraints of the RC beam, the loading condition, the amount of shear reinforcement, the shear span-to-depth ratio and the material characteristics[2].
Since the rapid loading machine can apply the load with the specified loading rate, the rapid loading machine is very suitable to investigate the influence of loading rate on the mechanical properties of RC beam specimens.
It was found that the test variables including the loading rate, shear span-to-depth ratio and shear reinforcement ratio clearly affect the load-midspan deflection relationships.
That for the RC beams failed in shear is affected by the dynamic compression and tension strengths of concrete.
Since the rapid loading machine can apply the load with the specified loading rate, the rapid loading machine is very suitable to investigate the influence of loading rate on the mechanical properties of RC beam specimens.
It was found that the test variables including the loading rate, shear span-to-depth ratio and shear reinforcement ratio clearly affect the load-midspan deflection relationships.
That for the RC beams failed in shear is affected by the dynamic compression and tension strengths of concrete.
Online since: October 2022
Authors: Pham Son Minh, Do Thanh Trung
Therefore, a new technique was researched and successfully applied to products that require a high accuracy and specific mechanical properties.
Packianather.., Investigation of micro-injection moulding: Factors affecting the replication quality, J.
Packianather.., Investigation of micro-injection moulding: Factors affecting the replication quality, J.
Online since: July 2007
Authors: Luigino Filice, Giuseppina Ambrogio, L. De Napoli, M. Muzzupappa
Muzzupappa1,d
1
Department of Mechanical Engineering - University of Calabria - P.
The idea that drove the present study is focused on the evaluation of the above factors and, for this purpose, a careful attention was paid on the shape definition.
Anyway, due to the problem complexity, it was considered strategic to reduce the factors of the experimental plane, fixing the process parameters during the manufacturing phase.
The chemical properties of the above said materials are highlighted in Table 1.
J. of Mechanical Science, vol. 42, 2000, 1271-1286
The idea that drove the present study is focused on the evaluation of the above factors and, for this purpose, a careful attention was paid on the shape definition.
Anyway, due to the problem complexity, it was considered strategic to reduce the factors of the experimental plane, fixing the process parameters during the manufacturing phase.
The chemical properties of the above said materials are highlighted in Table 1.
J. of Mechanical Science, vol. 42, 2000, 1271-1286
Online since: October 2010
Authors: Hong Xin Wang, Zheng Xiang Xue, Mei Hong Wei, Min Li, Deng-Long Chen
Silk proteins also have the properties to form fibers such as special strength, toughness, and resistance to mechanical compression [7-9].
They also meet many criteria for biomaterials with outstanding mechanical properties, biodegradability, and biocompatibility [10].
CK B. 2d C. 4d D. 6d Cells distributing and factors secreting in scaffolds HE staining of frozen sections showed (see Figure 6), the scaffold surface and mesh were visible in the NIH-3T3 cells growing along the material fiber.
The ideal tissue engineering scaffold must meet the following basic demands[25,26], good biocompatibility, biological stability and proper biodegradability; enough mechanical properties and good biocompatible properties; higher porosity and specific surface area, resolved substance and exudates with low content; biological carrier for cell, growth factor and gene, controlling growth factor release; extensive sources of raw material, low price and convenient for processing ,sterilization and disinfection.
Compound culture of cell and biomaterials was affected by essence of scaffold, species of cells, inoculum density and methods of compound culture.
They also meet many criteria for biomaterials with outstanding mechanical properties, biodegradability, and biocompatibility [10].
CK B. 2d C. 4d D. 6d Cells distributing and factors secreting in scaffolds HE staining of frozen sections showed (see Figure 6), the scaffold surface and mesh were visible in the NIH-3T3 cells growing along the material fiber.
The ideal tissue engineering scaffold must meet the following basic demands[25,26], good biocompatibility, biological stability and proper biodegradability; enough mechanical properties and good biocompatible properties; higher porosity and specific surface area, resolved substance and exudates with low content; biological carrier for cell, growth factor and gene, controlling growth factor release; extensive sources of raw material, low price and convenient for processing ,sterilization and disinfection.
Compound culture of cell and biomaterials was affected by essence of scaffold, species of cells, inoculum density and methods of compound culture.
Online since: December 2013
Authors: Jun Li, Ming Zhou, Ya Nan Si, Jia Jia Li
Due to disrepair, improper maintenance and management and other factors, the urban sewer appears varying degrees of damage phenomenon.
Domestic drainage pipeline repair project has been successfully adopted in reducing the HDPE pipe repair technology, short pipe lining welding repair technology, turn CIPP lining repair technology and mechanical system of spiral pipe lining repair technology and other kinds of trenchless technology, but turn CIPP lining repair technology is used more widely.
The design is aimed at the main and back streets whose damaged drainage pipe are trenchless, and the range are Kaixian District of Ankang, Pingqiao, Zhongji District branch, trenchless of drainage pipe network includes 38 roads, a total of 255 points, total cost is 6,798,570 Yuan. 3.2 Brief introduction of stainless steel foam cylinder technology The design of non excavation mainly uses stainless steel foam cylinder repair technology, the technology introduction is as follows: stainless steel foam cylinder technology produced in Canada, which is a specialized method of local repair without excavation for pipeline rupture, water leakage, leakage of mud, and so on and it can effectively strengthen to avoid sealing and mud; It’s durable, and it won’t fall off and affect the water section, etc.; The width of stainless steel foam cylinder is between 400mm to 600mm, the width of suitable diameter between 300 mm to 1500 mm Leakage of mild/moderate pipeline, not suitable for serious damaged pipeline
Its material technical indexes and characters (refer with: Tab.2) : Tab.2 Product specifications and characteristics of the blowing agent Water soluble polyurethane sealant product’s technical index and properties Appearance Light brown transparent liquid Density(g/cm3) 25℃±0.5℃ 0.98-1.10 Viscosity(Mpa.S)25℃±0.5℃ 60-500 The induced coagulation time(S) 10-1300 Expansion(%)≥ 100-400 Product characteristics 1 package water rate is large, resilient, can work with water, large shrinkage; 2 good hydrophilicity, the reaction immediately after contact with water, dispersed emulsion foaming expansion, and form the elastic concretion body with gravel and soil consolidation, quickly blocked cracks, permanent sealing; 3 control time of the induction foaming; 4 large expansion,toughness, no shrinkage, Strong adhesion with the substrate, and good adaptability to water quality; 5 good groutability,even at low temperature still can be grouting used; 6 easy construction and cleaning.
Domestic drainage pipeline repair project has been successfully adopted in reducing the HDPE pipe repair technology, short pipe lining welding repair technology, turn CIPP lining repair technology and mechanical system of spiral pipe lining repair technology and other kinds of trenchless technology, but turn CIPP lining repair technology is used more widely.
The design is aimed at the main and back streets whose damaged drainage pipe are trenchless, and the range are Kaixian District of Ankang, Pingqiao, Zhongji District branch, trenchless of drainage pipe network includes 38 roads, a total of 255 points, total cost is 6,798,570 Yuan. 3.2 Brief introduction of stainless steel foam cylinder technology The design of non excavation mainly uses stainless steel foam cylinder repair technology, the technology introduction is as follows: stainless steel foam cylinder technology produced in Canada, which is a specialized method of local repair without excavation for pipeline rupture, water leakage, leakage of mud, and so on and it can effectively strengthen to avoid sealing and mud; It’s durable, and it won’t fall off and affect the water section, etc.; The width of stainless steel foam cylinder is between 400mm to 600mm, the width of suitable diameter between 300 mm to 1500 mm Leakage of mild/moderate pipeline, not suitable for serious damaged pipeline
Its material technical indexes and characters (refer with: Tab.2) : Tab.2 Product specifications and characteristics of the blowing agent Water soluble polyurethane sealant product’s technical index and properties Appearance Light brown transparent liquid Density(g/cm3) 25℃±0.5℃ 0.98-1.10 Viscosity(Mpa.S)25℃±0.5℃ 60-500 The induced coagulation time(S) 10-1300 Expansion(%)≥ 100-400 Product characteristics 1 package water rate is large, resilient, can work with water, large shrinkage; 2 good hydrophilicity, the reaction immediately after contact with water, dispersed emulsion foaming expansion, and form the elastic concretion body with gravel and soil consolidation, quickly blocked cracks, permanent sealing; 3 control time of the induction foaming; 4 large expansion,toughness, no shrinkage, Strong adhesion with the substrate, and good adaptability to water quality; 5 good groutability,even at low temperature still can be grouting used; 6 easy construction and cleaning.
Online since: October 2011
Authors: Shao Shu Chu, Jung Chang Hsu, Christopher Miguel Sevilla, Chun Huang Chiang
There are multiple factors that must be considered in order to achieve the maximum light output and uniform irradiance: LED to LED spacing [4], LED to Reflector Spacing [5], LED arrangement, available LED heat dissipation surface area [6, 7], LED radiation pattern, LED angle [8], reflector size, reflectivity, and the use of a diffusion film, all these factors are all connected in the formation of a luminary device with an acceptable uniform irradiance.
A series of geometrical properties, as well as ray tracing equations must be employed in order to understand ray behavior and manipulate light direction.
This example provides easy and clear understanding of the most important factors in LED light design applications.
Fig. 5 and Fig. 7 shows how L and the angle θ affect the uniform irradiance and light intensity.
This example is good because it combines all the main factors, LED arrangement, spacing, and angles, and correct use of the inverse ray tracing equations.
A series of geometrical properties, as well as ray tracing equations must be employed in order to understand ray behavior and manipulate light direction.
This example provides easy and clear understanding of the most important factors in LED light design applications.
Fig. 5 and Fig. 7 shows how L and the angle θ affect the uniform irradiance and light intensity.
This example is good because it combines all the main factors, LED arrangement, spacing, and angles, and correct use of the inverse ray tracing equations.
Online since: March 2017
Authors: Eva Burgetová, Josef Řehák, Jakub Řehák
This paper describes an interesting discovery in the basement of the monastery and presents conceptual design of remediation pointing out, at the same time, the risk factors.
Underground galleries and brick channels have often also ventilation function, when air flow and water vapours significantly affect moisture conditions of buildings.
Tywoniak, Hydrophobic treatment of wood fibrous thermal insulator by octadecyltrichlorosilane and its influence on hygric properties and resistance against moulds, Composites Part B Engineering 106, 2016, 106 285-293.
Tichá, P.: Modeling Interior Environment of Historical Building and Determination of Critical Places for Application of Nanotextiles Protection. in: Advanced Materials, Structures and Mechanical Engineering.
Underground galleries and brick channels have often also ventilation function, when air flow and water vapours significantly affect moisture conditions of buildings.
Tywoniak, Hydrophobic treatment of wood fibrous thermal insulator by octadecyltrichlorosilane and its influence on hygric properties and resistance against moulds, Composites Part B Engineering 106, 2016, 106 285-293.
Tichá, P.: Modeling Interior Environment of Historical Building and Determination of Critical Places for Application of Nanotextiles Protection. in: Advanced Materials, Structures and Mechanical Engineering.