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Online since: June 2012
Authors: Ri Xian Ding, Cheng Guo, Huan Huan Zhang
The importance of the interaction means that the ability of contact stress in crack ratio reduction depends on the level of punch velocity.
But the reduction of the rack ratio was limited in the case that only the blank holder force (FB) increased [7].
The optimal value of the output can be predicted by the regression model which fitting the experimental data.
The input data for the regression model were translated into code variables from their original units [17].
It means that although the punch velocity had the least effect on crack ratio reduction, the trend of crack ratio was heavily influenced by the punch velocity, which is the result of interaction between the contact stress and the punch velocity.
But the reduction of the rack ratio was limited in the case that only the blank holder force (FB) increased [7].
The optimal value of the output can be predicted by the regression model which fitting the experimental data.
The input data for the regression model were translated into code variables from their original units [17].
It means that although the punch velocity had the least effect on crack ratio reduction, the trend of crack ratio was heavily influenced by the punch velocity, which is the result of interaction between the contact stress and the punch velocity.
Online since: May 2011
Authors: Yue Xiang Wang, Ying Liao
Based on the experiment data, a mathematical model relating the strength gain of solidified sludge matrices to the ratio of binder to waste is proposed by statistical analysis.
The proposed method is then verified with available test data.
Both the toxicty reduction of the waste and the minimizationof the migration of the contaminants from the waste are achieved [1,2,3].
Conclusions The main conclusions obtained in this study are summaried as follows: (1)A simple index which is defined as the ratio of binder to waste is proposed for interpretation of test data of solidified waste matrices.
Verified with the available test data, the predicted results seem to be acceptable.
The proposed method is then verified with available test data.
Both the toxicty reduction of the waste and the minimizationof the migration of the contaminants from the waste are achieved [1,2,3].
Conclusions The main conclusions obtained in this study are summaried as follows: (1)A simple index which is defined as the ratio of binder to waste is proposed for interpretation of test data of solidified waste matrices.
Verified with the available test data, the predicted results seem to be acceptable.
Online since: January 2013
Authors: Mao Mao Hou, Yu Min Yan, Xue Wang
Soil type and data of original physical and chemical properties of the soil in the experimental plot are shown in Table 1.
The datum point number was 0.
Among all the treatments, non-drainage treatment(CK) performed quite poor, the EC desalination quantity of which was much less than the drainage treatments, What's more, after 4th July, it was on an almost horizontal curve, this demonstrated that only irrigation without subsurface drainage had little effect on the salinity reduction.
With the drainage system, the surface soil EC was in a trend of fluctuant reduction, the desalination ratio of T1.1, T1.2, T2.1, T2.2 and CK was 13.5%, 11.2%, 14.8%, 12.6%, and 6.0% respectively, proving that T2 was the better design, and the desalination effect of drainage treatments was satisfactory.
Quantative inversion based on hyperspectral data for soil salinization in the ecological corridor of tarim river, xinjiang,china; proceedings of the 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings, July 6, 2008 - July 11, 2008, Boston, MA, United states, F, 2008 [C].
The datum point number was 0.
Among all the treatments, non-drainage treatment(CK) performed quite poor, the EC desalination quantity of which was much less than the drainage treatments, What's more, after 4th July, it was on an almost horizontal curve, this demonstrated that only irrigation without subsurface drainage had little effect on the salinity reduction.
With the drainage system, the surface soil EC was in a trend of fluctuant reduction, the desalination ratio of T1.1, T1.2, T2.1, T2.2 and CK was 13.5%, 11.2%, 14.8%, 12.6%, and 6.0% respectively, proving that T2 was the better design, and the desalination effect of drainage treatments was satisfactory.
Quantative inversion based on hyperspectral data for soil salinization in the ecological corridor of tarim river, xinjiang,china; proceedings of the 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings, July 6, 2008 - July 11, 2008, Boston, MA, United states, F, 2008 [C].
Online since: September 2004
Authors: W. Sun, Thomas H. Hyde
Model or full-scale bends and welded
pipe components have been tested to establish component data as a basis for the validation of life
estimation techniques [e.g. 2-4].
Creep testing data are often used for determining material properties for component modelling purposes, and for material or component assessments during service.
The determination of the material constants in damage models, Eqs. (1), involves extensive experimental work and interpretation of test data.
For the one state variable equations, Eqs. (1), the material constants A, n, m, B, φ and χ for parent and weld materials can be determined from conventional uniaxial creep test data [14], while the triaxial parameter α for parent and weld materials can be determined from the data of notched bar rupture tests.
Peak steady-state stresses are commonly used with rupture data, equation (3), for life estimation of relatively complicated components.
Creep testing data are often used for determining material properties for component modelling purposes, and for material or component assessments during service.
The determination of the material constants in damage models, Eqs. (1), involves extensive experimental work and interpretation of test data.
For the one state variable equations, Eqs. (1), the material constants A, n, m, B, φ and χ for parent and weld materials can be determined from conventional uniaxial creep test data [14], while the triaxial parameter α for parent and weld materials can be determined from the data of notched bar rupture tests.
Peak steady-state stresses are commonly used with rupture data, equation (3), for life estimation of relatively complicated components.
Online since: October 2004
Authors: Gennady A. Salishchev, S. Lee Semiatin, S.V. Zerebtsov, S.Yu. Mironov
Microstructure evolution in alpha-beta Ti-64 alloy samples with lamellar structure
deformed to a height reduction of 70% at temperatures between 450 and 800°C has been
investigated.
According to the data of different authors [2-8] such intraphase bounaries may be twinned, low angle and high angle boundaries created during the previous history of working.
According to the data available [5,6,8] the formation of high angle boundaries is responsible for the transformation of interphase boundaries from coherent or semi-coherent to noncoherent thus initiating splitting and spheriodization of a lamellae.
At the same time, as data of a number of investigations [10] show, a spectrum of boundaries having different misorientations can be formed with plastic deformation.
Initially, cylindrical samples (∅10mm×15mm) were subjected to uniaxial compression to a height reduction of 70% at an initial strain rate 10 -3s-1.
According to the data of different authors [2-8] such intraphase bounaries may be twinned, low angle and high angle boundaries created during the previous history of working.
According to the data available [5,6,8] the formation of high angle boundaries is responsible for the transformation of interphase boundaries from coherent or semi-coherent to noncoherent thus initiating splitting and spheriodization of a lamellae.
At the same time, as data of a number of investigations [10] show, a spectrum of boundaries having different misorientations can be formed with plastic deformation.
Initially, cylindrical samples (∅10mm×15mm) were subjected to uniaxial compression to a height reduction of 70% at an initial strain rate 10 -3s-1.
Online since: October 2011
Authors: Zhi Ming Feng, Liang Li
Two parts’ stress data can be got through nonlinear calculation, and the data are able to be combined with C++ application.
Secondary development of ANSYS based on stress data files.
With specific issues, we need extract stress data of part A from “file1.ist” and stress data of part B from “file2.ist”.
Depending on the data structure of stress file after two times solution, we can call character manipulation command of C++, combining valid data of “file1.ist” and “file2.ist” into file3.ist.
Dimensional variation reduction for automotive body assembly[J].
Secondary development of ANSYS based on stress data files.
With specific issues, we need extract stress data of part A from “file1.ist” and stress data of part B from “file2.ist”.
Depending on the data structure of stress file after two times solution, we can call character manipulation command of C++, combining valid data of “file1.ist” and “file2.ist” into file3.ist.
Dimensional variation reduction for automotive body assembly[J].
Online since: February 2011
Authors: Ze Biao Zhang, Hui Juan Pan, Jin Hui Peng, Li Bo Zhang, Wei Li
The experimental data indicated that the apparent density and the nitrogen content of the microwave sinter sample was 4.1 g/cm3 and 13.8 %, respectively under the optimum conditions of flowing rate of nitrogen 50 L/h, heating rate of 6 ℃/min to 1400 ℃ and soaking time of 50 min.
Microwave assisted carbonitrithermal reduction has already been reported about the extent of nitridation and the deoxygenized procedure [9, 11, []B.Vaidhyanathan, D.K.Agrewal, and R.Roy: J.
Vanadium nitride samples were synthesized employing the method of carbothermal reduction from V2O5 in nitrogen atmosphere, with a weight ratio of C/V2O5 = 0.27 : 1.
This flow rate was proper to maintain a low CO pressure and high N2 pressure around the pellets and accelerates the reduction and nitride reaction.
Microwave assisted carbonitrithermal reduction has already been reported about the extent of nitridation and the deoxygenized procedure [9, 11, []B.Vaidhyanathan, D.K.Agrewal, and R.Roy: J.
Vanadium nitride samples were synthesized employing the method of carbothermal reduction from V2O5 in nitrogen atmosphere, with a weight ratio of C/V2O5 = 0.27 : 1.
This flow rate was proper to maintain a low CO pressure and high N2 pressure around the pellets and accelerates the reduction and nitride reaction.
Online since: May 2011
Authors: Li Ya Wang, Xian Ming Liu, Sen Lan Li, Jian Ping Wang
The purpose of this study is to obtain basic data on the properties of the development of lightweight foamed concrete containing a novel and high-efficiency foaming agent for various applications.
The compressive strength decreases exponentially with a reduction in density of foamed concrete due to an increase in void diameter in low density.
A decrease of concrete dry density by 200kg/m3 results in a reduction of thermal conductivity by 0.04W/m·K of lightweight foamed concrete.
When the density increases, the volume of entrained air pore decreased to cause a reduction in the volume of capillary pores and thus showed a decreasing trend of water absorption.
The compressive strength decreases exponentially with a reduction in density of foamed concrete due to an increase in void diameter in low density.
A decrease of concrete dry density by 200kg/m3 results in a reduction of thermal conductivity by 0.04W/m·K of lightweight foamed concrete.
When the density increases, the volume of entrained air pore decreased to cause a reduction in the volume of capillary pores and thus showed a decreasing trend of water absorption.
Characterization of Pore Structure of Hardened Cement-Asphalt Paste by Mercury Intrusion Porosimetry
Online since: August 2014
Authors: Xi Ling Zhou, You Jun Xie, Ke Ren Zheng, Sheng Zhang, Qiang Fu
The results show that the total porosities decline with increase in ages and reduction in A/C ratio.
The great advantages of such structures can be summarized, such as reduction of structure height, lower maintenance requirements and increased service life and so on.
So compared with ordinary cement-based material, there are some errors for the obtained results of CAB, for example, the smaller pore size it is, the larger error ,which is worth noting when the data are analyzed.
The great advantages of such structures can be summarized, such as reduction of structure height, lower maintenance requirements and increased service life and so on.
So compared with ordinary cement-based material, there are some errors for the obtained results of CAB, for example, the smaller pore size it is, the larger error ,which is worth noting when the data are analyzed.
Online since: September 2017
Authors: Michael N. Ignatov, Anna M. Ignatova, Arseny O. Artemov
The strength of stone casting silicate materials is the reduction in the difference in the temperature coefficients of linear expansion of crystal phases and residual glass phase.
Based on thermal analysis data of researched technogenic raw materials, the following temperature ranges of technological operations for synthesis of stone casting silicate materials have been proposed: the initial melting point corresponds 1200 – 1250 ºC and the end of melting is 1300 – 1350ºC; 1250 – 1300ºC is casting temperature; 1200 – 850ºC is crystallization interval with one-step heat treatment and exposure during 1.5 hours at 950 – 900ºС, followed by cooling in an oven at 10 °C/min.
Secondly, the reason for increasing the strength of stone casting silicate materials is reduction in the difference in the temperature coefficients of linear expansion of crystal phases and residual glass phase [9, 10].
Based on thermal analysis data of researched technogenic raw materials, the following temperature ranges of technological operations for synthesis of stone casting silicate materials have been proposed: the initial melting point corresponds 1200 – 1250 ºC and the end of melting is 1300 – 1350ºC; 1250 – 1300ºC is casting temperature; 1200 – 850ºC is crystallization interval with one-step heat treatment and exposure during 1.5 hours at 950 – 900ºС, followed by cooling in an oven at 10 °C/min.
Secondly, the reason for increasing the strength of stone casting silicate materials is reduction in the difference in the temperature coefficients of linear expansion of crystal phases and residual glass phase [9, 10].