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Online since: April 2013
Authors: Gerhard Hirt, Andreas Nick, Joachim Zettler
To overcome the problem of long process times and high costs, in recent years, a lot of research did happen with the goal of temperature reduction during forming or forming at higher strain rates.
Especially the change in the aeronautic industry towards high volume production is increasing the competition between suitable forming technologies and the SPF technology can only persist if both goals, reduction of process time and recurring costs are reachable.
This methodology allows the calculation of the strain rate sensitivity between every two individual data sets, which makes the model applicable for a wide range of strain rates.
This leads to pressure – time cycles that allow a reduction in forming time.
Especially the change in the aeronautic industry towards high volume production is increasing the competition between suitable forming technologies and the SPF technology can only persist if both goals, reduction of process time and recurring costs are reachable.
This methodology allows the calculation of the strain rate sensitivity between every two individual data sets, which makes the model applicable for a wide range of strain rates.
This leads to pressure – time cycles that allow a reduction in forming time.
Online since: September 2014
Authors: Francesco Gagliardi, Giuseppe Ingarao, Rosa Di Lorenzo, Paolo Claudio Priarone, Luca Settineri
The material production step and the manufacturing phase to obtain a simple axy-symmetric aluminum component is considered for the Life Cycle Inventory (LCI) data collection step.
Life cycle inventory data collection The bulk forming process.
As the die and billet heating energy consumption is concerned, some data present in literature have been preferred in order to better describe the aluminum billet heating industrial practice [19].
Such data have been picked up from the research published by Rajemi et al. [4].
An LCA approach based both on experimental measurements and bibliographic data collection has been presented.
Life cycle inventory data collection The bulk forming process.
As the die and billet heating energy consumption is concerned, some data present in literature have been preferred in order to better describe the aluminum billet heating industrial practice [19].
Such data have been picked up from the research published by Rajemi et al. [4].
An LCA approach based both on experimental measurements and bibliographic data collection has been presented.
Online since: December 2013
Authors: Andrey A. Askadskii, Marina Popova, Tatyana Matseevich, Egor Afanasyev
It was found that reduction of the crystallites size down to nanosize essentially increased the elasticity modulus at their fixed concentration.
The aim of this work consists in calculation of the elasticity modulus of a semi-crystalline polymer based solely on its chemical structure and the degree of crystallinity, with no resort to experimental data.
The proposed calculation scheme does not require the knowledge of any experimental data except for the chemical structure of the polymer.
The aim of this work consists in calculation of the elasticity modulus of a semi-crystalline polymer based solely on its chemical structure and the degree of crystallinity, with no resort to experimental data.
The proposed calculation scheme does not require the knowledge of any experimental data except for the chemical structure of the polymer.
Online since: April 2009
Authors: Roger N. Lumley, Ian J. Polmear
Although this practice may cause some reduction in tensile properties, it has been shown that
significant improvements may be achieved in creep resistance, fatigue strength and fracture
toughness.
Stress-/umber of Cycles (S-/) data for the Al-Cu-Mg-Ag-Mn-Zr alloy tested in the (a) T6 and (b) UA conditions [4].
Although such a treatment inevitably results in some reduction in tensile properties when compared with those for the fully hardened T6 temper, creep and fatigue resistance may both be enhanced.
Stress-/umber of Cycles (S-/) data for the Al-Cu-Mg-Ag-Mn-Zr alloy tested in the (a) T6 and (b) UA conditions [4].
Although such a treatment inevitably results in some reduction in tensile properties when compared with those for the fully hardened T6 temper, creep and fatigue resistance may both be enhanced.
Online since: July 2013
Authors: Nan Shi, Ying Fu, Juan Tan, Yan Zhen Yu, Yan Zheng Wang
The oxidation-reduction potential (ORP) value and storing time of SOPSF were explored in comparison with those of poly-Si-Fe (PSF).
This work will provide some useful data for further development of this kind of coagulant.
Just as stated in Preparation of SOPSF, dilution of SOPSF or PSF at Fe concentration of 0.18 mol.L-1 was often used as storage product, therefore, a proper reduction of temperature was very useful to improve SOPSF stability.
This work will provide some useful data for further development of this kind of coagulant.
Just as stated in Preparation of SOPSF, dilution of SOPSF or PSF at Fe concentration of 0.18 mol.L-1 was often used as storage product, therefore, a proper reduction of temperature was very useful to improve SOPSF stability.
Online since: December 2011
Authors: Kamal Ait Tahar, S. Bouaziz
The profit of weight, which can be more or less important according to the type of concrete, involves a reduction in the sections of the elements structural ensuring the load transfer.
One of the possible ways of reduction for the concrete is the replacement of the usual aggregates, which constitute approximately the 3/4 of the mass of the concrete, by lightweight aggregates, natural or artificial.
The profit of weight, which can be more or less important according to the type of concrete, involves a reduction in the sections of the elements structural ensuring the load transfer.
(2) Where: ; The data concerning the different parameters used in this study are given by the table 3.
Parameters values used Data Ri (mm) () R1 R2 R3 1,5 1,55 1,55- 3 0,35 0,50 The calculated results give the median value of the thermal conductivity of the elaborate aggregate is of .
One of the possible ways of reduction for the concrete is the replacement of the usual aggregates, which constitute approximately the 3/4 of the mass of the concrete, by lightweight aggregates, natural or artificial.
The profit of weight, which can be more or less important according to the type of concrete, involves a reduction in the sections of the elements structural ensuring the load transfer.
(2) Where: ; The data concerning the different parameters used in this study are given by the table 3.
Parameters values used Data Ri (mm) () R1 R2 R3 1,5 1,55 1,55- 3 0,35 0,50 The calculated results give the median value of the thermal conductivity of the elaborate aggregate is of .
Online since: October 2013
Authors: Lie Zhun Wang, Zi Qing Liu
Project research pioneered the use of computer integrated manufacturing system in the same industry, the products of the project by making use of computer aided design and database management system in the design, including the establishment of a comprehensive database design, motor test, standard, material, structure and other data; use some of the basic graph element and drawing software, drawing motor design in the computer, establishing the database, the computer aided design system design, analysis, calculation, drawing, through the information flow and computer aided manufacturing system, organically into a whole, forming a computer integrated manufacturing system.
This combination of comprehensive database for standard parts, materials, structure, test should meet the performance data standards, through the information flow and computer aided manufacturing system of AC, obtain a better design scheme.
And the whole machine assembly, the gap between the stator and rotor (uniform air gap) is relatively uniform, comply with the design requirements, the operation of the electric motor magnetic force field uniform, and electromagnetic noise reduction are good.
The wind friction loss is mainly composed of fan power consumption which, because of increased efficiency, reduces the heat load, without increasing the temperature rise, the motor required air volume can be reduced, so the fan size can be reduced, so that the ventilation loss reduction, shown in Fig.6 is the fan blade design structure improvement.Fig.7 shows the structure of fan blade originally used in project, product use, influence on the temperature rise and the efficiency of the motor is large, the efficiency of 90.92%, temperature 73.4K, 89.4dB modified noise; fan shape does not change the diameter, width, test efficiency is 91.59%, temperature 67.1K, noise 87.2dB; the smaller diameter 20mm, efficiency 91.72%, temperature 61.5K, noise 84.7dB[3,4].
With IEC efficient (IE2), high efficiency (IE3) of [J] loss reduction measures motor efficiency levels.
This combination of comprehensive database for standard parts, materials, structure, test should meet the performance data standards, through the information flow and computer aided manufacturing system of AC, obtain a better design scheme.
And the whole machine assembly, the gap between the stator and rotor (uniform air gap) is relatively uniform, comply with the design requirements, the operation of the electric motor magnetic force field uniform, and electromagnetic noise reduction are good.
The wind friction loss is mainly composed of fan power consumption which, because of increased efficiency, reduces the heat load, without increasing the temperature rise, the motor required air volume can be reduced, so the fan size can be reduced, so that the ventilation loss reduction, shown in Fig.6 is the fan blade design structure improvement.Fig.7 shows the structure of fan blade originally used in project, product use, influence on the temperature rise and the efficiency of the motor is large, the efficiency of 90.92%, temperature 73.4K, 89.4dB modified noise; fan shape does not change the diameter, width, test efficiency is 91.59%, temperature 67.1K, noise 87.2dB; the smaller diameter 20mm, efficiency 91.72%, temperature 61.5K, noise 84.7dB[3,4].
With IEC efficient (IE2), high efficiency (IE3) of [J] loss reduction measures motor efficiency levels.
Online since: December 2016
Authors: Nizar Jawad Hadi, Dhey Jawad Mohamed
Polymer rheological data is used in determining whether or not a type of polymer can be extruded, molded or shaped into a practical and useable product.
The flexible and ductile structure of the polymer chains are obtained due to the reduction in shear viscosity.
The melt density is a very important data for numerical simulation study of rheological and flow behaviour of polymer melts.
The reduction in intermolecular forces decreases the storage modulus and increases the impact resistance.
The reduction in viscosity due to the alignments of polymer chains may be improved the hardness.
The flexible and ductile structure of the polymer chains are obtained due to the reduction in shear viscosity.
The melt density is a very important data for numerical simulation study of rheological and flow behaviour of polymer melts.
The reduction in intermolecular forces decreases the storage modulus and increases the impact resistance.
The reduction in viscosity due to the alignments of polymer chains may be improved the hardness.
Online since: October 2006
Authors: Jin Ho Park, Yang Hann Kim
Noise reduction technique
When a transient signal is mixed with a stationary random noise, the conventional noise cancellation
techniques are not available.
Experiment and simulation Figure 4 illustrates the data acquisition system and the signal flow of the impact response signals for an 1/8 reactor mock-up model whose lower part has the form of a half spherical shell.
Therefore a noise reduction is indispensable to cope with this problem.
Also a noise reduction technique by using a smoothed Wigner-Ville distribution has been proposed.
Piersol, Random Data Analysis and Measurement Procedures, John Wiley & Sons Inc. 3rd ed., pp.86-90, 2000
Experiment and simulation Figure 4 illustrates the data acquisition system and the signal flow of the impact response signals for an 1/8 reactor mock-up model whose lower part has the form of a half spherical shell.
Therefore a noise reduction is indispensable to cope with this problem.
Also a noise reduction technique by using a smoothed Wigner-Ville distribution has been proposed.
Piersol, Random Data Analysis and Measurement Procedures, John Wiley & Sons Inc. 3rd ed., pp.86-90, 2000
Online since: June 2016
Authors: Hendry Sakke Tira, Ahmad Alfan Syahida, Yesung Allo Padang, Tri Rachmanto
According to the results, one of the factors which reduce the water scrubbing method performance is the reduction of absorbent pH.
The data was taken continuously for 45 minutes started from minute 31 [7].
Data from minute 1 – 30 were not showed as the methane content of the purified biogas still very low.
Relatively strong base level of absorbent attributed as the main factor for CO2 reduction.
Compared than raw biogas, there was at maximum of 80% reduction of H2S in purified biogas.
The data was taken continuously for 45 minutes started from minute 31 [7].
Data from minute 1 – 30 were not showed as the methane content of the purified biogas still very low.
Relatively strong base level of absorbent attributed as the main factor for CO2 reduction.
Compared than raw biogas, there was at maximum of 80% reduction of H2S in purified biogas.