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Online since: June 2017
Authors: Ling Pang, Zhang Chao Cui, Nai Zhi Zhang, Xue Mei Zhang, He Chuan Li
Effect of aging on physical properties of asphalt binder was studied.
Introduction During asphalt pavement construction and service, the chemical and mechanical properties of asphalt binder are changed due to aging [1-5], which may cause the deterioration of pavement properties of asphalt mixture and affect the durability of asphalt pavement [6-7].
The effects of the harden of binder on the properties of asphalt mixture have gained attention [11].
Their properties are listed in Table 1.
Study on evaluation index of low temperature properties of asphalt mixture[J].
Introduction During asphalt pavement construction and service, the chemical and mechanical properties of asphalt binder are changed due to aging [1-5], which may cause the deterioration of pavement properties of asphalt mixture and affect the durability of asphalt pavement [6-7].
The effects of the harden of binder on the properties of asphalt mixture have gained attention [11].
Their properties are listed in Table 1.
Study on evaluation index of low temperature properties of asphalt mixture[J].
Online since: August 2014
Authors: Mohamed N.A. Nasr
The grain size effect even extends to other mechanical properties, like hardness, wear resistance and fatigue life [1, 5].
The effect of grain size on mechanical properties is mainly attributed to grain-boundary strengthening, which is affected by four main factors as identified by Hu et al. [2].
With regards to grain size effects, the main focus of the literature was on correlating grain size to material mechanical properties.
All other material properties were kept constant and similar to those of AISI 316L, for model validation purposes.
Tool physical properties were obtained from [12].
The effect of grain size on mechanical properties is mainly attributed to grain-boundary strengthening, which is affected by four main factors as identified by Hu et al. [2].
With regards to grain size effects, the main focus of the literature was on correlating grain size to material mechanical properties.
All other material properties were kept constant and similar to those of AISI 316L, for model validation purposes.
Tool physical properties were obtained from [12].
Online since: September 2013
Authors: Lin Li, Wen Li Liu, Bao Yu Hong, Fei Li
At last some influence factors alignment precision is analyzed.
At last the affecting factors of non-coincidence errors between the focal plane and object board are analyzed.
The measurement result shows that the collimation of the LDC system is 0. 3 arc second The accuracy of focus detection will be affected by the following factors: relative aperture of optical system, optical component surface shape quality, aberrations of optical system, inherent noise and instability of the CCD detector, air disturbance (for collimator with long focal length), vibration caused by motor drive, the drift of the laser interferometer.
The stability of the spot energy distribution will be affected by the CCD noise and mechanical vibration.
All these factors will obviously reduce the detection sensitivity of focus position, which can be verified by above experiment results.
At last the affecting factors of non-coincidence errors between the focal plane and object board are analyzed.
The measurement result shows that the collimation of the LDC system is 0. 3 arc second The accuracy of focus detection will be affected by the following factors: relative aperture of optical system, optical component surface shape quality, aberrations of optical system, inherent noise and instability of the CCD detector, air disturbance (for collimator with long focal length), vibration caused by motor drive, the drift of the laser interferometer.
The stability of the spot energy distribution will be affected by the CCD noise and mechanical vibration.
All these factors will obviously reduce the detection sensitivity of focus position, which can be verified by above experiment results.
Online since: May 2006
Authors: P. Garefis, Eleana Kontonasaki, K. Papazisis, Konstantinos M. Paraskevopoulos, A. Kortsaris, T. Zorba, Petros Koidis, Lambrini Papadopoulou
The incorporation of Bioglass
®
powder in zinc phosphate specimens resulted in
equal or increased cell attachment and activity for almost all cell lines examined without any
apparent impact on mechanical or physicochemical properties of the cement, although this needs
further documentation.
Their disadvantages however include solubility, low tensile strength, lack of adhesiveness to tooth structure and no anticariogenic properties [5,6].
The immersion even for 16 days did not result in any brittleness of the modified samples and it seems that the mechanical or physicochemical properties of the cement were not affected.
However these findings need further clarification in future research with mechanical properties testing and solubility assessments. 450 600 750 900 1050 1200 1350 Z PC-0.3 Z PC-0.3 7days Z PC-0.3 16days Reflectance W avenum ber (cm -1) Fig.4.
However immersion in SBF negatively affected cell growth compared to non-immersed specimens.
Their disadvantages however include solubility, low tensile strength, lack of adhesiveness to tooth structure and no anticariogenic properties [5,6].
The immersion even for 16 days did not result in any brittleness of the modified samples and it seems that the mechanical or physicochemical properties of the cement were not affected.
However these findings need further clarification in future research with mechanical properties testing and solubility assessments. 450 600 750 900 1050 1200 1350 Z PC-0.3 Z PC-0.3 7days Z PC-0.3 16days Reflectance W avenum ber (cm -1) Fig.4.
However immersion in SBF negatively affected cell growth compared to non-immersed specimens.
Online since: March 2010
Authors: Jin Sheng Zhang, Zheng Mei Zhang, Sheng Gao, Cheng Rui Lu, Chun Ying Zheng
Introduction
Irregular products of granite are widely used in these areas such as architectural decoration, living
appliance, precision machinery and so on for its beautiful artistic shapes and excellent physical
properties, which are mostly machined by segmented diamond contour tools.
Combined effects on machining irregular surface of granite, three processing parameters, namely cutting speed vs, feed rate vw and cutting depth ap are selected to form three orthogonal factors[6].
According to the experimental factors and levels in Table 1, the orthogonal array L9 (33) is assigned according to the orthogonal test design method.
Table 2 gives the primary and secondary factor relations about TWR and GF are all B→C→A So it can be obtained that factor B is the first influencing factor to TWR and GF.
Used the values in Table 2, the tendency charts of various factors affecting the TWR and GF are shown in Fig. 1. 0.1 0.2 0.3 0.4 0.5 0.6 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Tool Wear Rate[mm/dm 3 ] 200 250 300 350 400 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Grinding Force Fx[N] 1 (a) TWR tendency chart (b) Fx tendency chart 1200 1400 1600 1800 2000 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Grinding Force Fy[N] 600 800 1000 1200 1400 1600 1800 2000 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Grinding Force Fz[N] 1 (c) Fy tendency chart (d) Fz tendency chart Fig. 1 Tendency charts about evaluation indexes Fig. 1 (a) is the trend of TWR that changes with the level of factors, which is reduced with the increase of cutting speed and aggrandized with the increase of feed rate and cutting depth.
Combined effects on machining irregular surface of granite, three processing parameters, namely cutting speed vs, feed rate vw and cutting depth ap are selected to form three orthogonal factors[6].
According to the experimental factors and levels in Table 1, the orthogonal array L9 (33) is assigned according to the orthogonal test design method.
Table 2 gives the primary and secondary factor relations about TWR and GF are all B→C→A So it can be obtained that factor B is the first influencing factor to TWR and GF.
Used the values in Table 2, the tendency charts of various factors affecting the TWR and GF are shown in Fig. 1. 0.1 0.2 0.3 0.4 0.5 0.6 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Tool Wear Rate[mm/dm 3 ] 200 250 300 350 400 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Grinding Force Fx[N] 1 (a) TWR tendency chart (b) Fx tendency chart 1200 1400 1600 1800 2000 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Grinding Force Fy[N] 600 800 1000 1200 1400 1600 1800 2000 A1 A2 A3 B1 B2 B3 C1 C2 C3 Factor Level Grinding Force Fz[N] 1 (c) Fy tendency chart (d) Fz tendency chart Fig. 1 Tendency charts about evaluation indexes Fig. 1 (a) is the trend of TWR that changes with the level of factors, which is reduced with the increase of cutting speed and aggrandized with the increase of feed rate and cutting depth.
Online since: August 2013
Authors: Lan Ying Zhou, Yu Liang Yang, Jie Zhu
Under different crystallization time, grain size distribution of the synthetic product
According to the above analysis, the factors affecting the synthesis of analcime optimum technological parameters are: silica alumina ratio SiO2, Al2O3 is 50, stirring time is 6 h, aging time of 24 h, the crystallization temperature is 120 ℃, crystallization time is 15 h.
In the synthesis of zeolite, not only by the stirring time, aging time, the influence of crystallization temperature and time, also affected by other factors.
Under existing experimental conditions, taking into account the above factors on the influence of the crystallization products, and through X-ray diffraction (XRD) and FM-300 microscopy to the characterization of products.
Through the analysis of front can draw the following conclusions: 1)a long time formed by the mixing of zeolite molecular sieve grain size is small, has the trend of membrane; 2) the crystallization temperature and time have a great effect for the synthesis of zeolite, and two factors often appear interaction; 3) aging time effect is not big, aging time on the role of zeolite synthesis mechanism needs further research.
The Synthesis and Properties of Microsize NaY Zeolite.
In the synthesis of zeolite, not only by the stirring time, aging time, the influence of crystallization temperature and time, also affected by other factors.
Under existing experimental conditions, taking into account the above factors on the influence of the crystallization products, and through X-ray diffraction (XRD) and FM-300 microscopy to the characterization of products.
Through the analysis of front can draw the following conclusions: 1)a long time formed by the mixing of zeolite molecular sieve grain size is small, has the trend of membrane; 2) the crystallization temperature and time have a great effect for the synthesis of zeolite, and two factors often appear interaction; 3) aging time effect is not big, aging time on the role of zeolite synthesis mechanism needs further research.
The Synthesis and Properties of Microsize NaY Zeolite.
Online since: April 2021
Authors: Ashish Selokar, Domadala Pranav, Sruthi Sivaram, Mukesh Nadarajan
Al 6061 gives good formability and excellent mechanical properties.
It is observed that various studies have been carried out other mechanical properties except than the hardness and impact energy.
This is due to its simplicity and low cost relative to direct measurement of many properties
R., Effect of thermal treatment on the mechanical and toughness properties of extruded SiCw/ Aluminium 6061 metal matrix composite.
Mechanical properties of particulate-reinforced aluminum matrix composites.
It is observed that various studies have been carried out other mechanical properties except than the hardness and impact energy.
This is due to its simplicity and low cost relative to direct measurement of many properties
R., Effect of thermal treatment on the mechanical and toughness properties of extruded SiCw/ Aluminium 6061 metal matrix composite.
Mechanical properties of particulate-reinforced aluminum matrix composites.
Online since: March 2010
Authors: Hong Yu Zhu, Wei Jin Chen, Ying Li
Wavelet Neural Network - based Research on Online Wearing
Prediction of TI6AL4V Cutter in High Speed Milling
Hongyu Zhu1,2, Weijin Chen3 and Ying Li1
1
College of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing, China,
210094
2
Nanjing College of Chemical Technology, Nanjing, China, 210048
3
Csr Qishuyanlocomtive & rolling stock research institute co.ltd, 213011
Keywords: Wavelet packets, Neural network, High speed milling, Ti6Al4V, Cutter wearing online
prediction
Abstract.
To improve the machining efficiency, reduce machining cost and improve products quality, the cutting tool wear is the key factor affecting machining quality, machining efficiency and production safety.
As the cutting tool wear is the key factor affecting machining quality, machining efficiency and production safety.
Among them, the cutting force signal is direct and real, it could not be affected by cut chips and coolant and also has big extent and good capability of anti-interference.
It combines the property of good-conversion, time-frequency localization of wavelet and study capability of neural network, and it is suitable to solve those problems on function approximation, system identification and model recognition.
To improve the machining efficiency, reduce machining cost and improve products quality, the cutting tool wear is the key factor affecting machining quality, machining efficiency and production safety.
As the cutting tool wear is the key factor affecting machining quality, machining efficiency and production safety.
Among them, the cutting force signal is direct and real, it could not be affected by cut chips and coolant and also has big extent and good capability of anti-interference.
It combines the property of good-conversion, time-frequency localization of wavelet and study capability of neural network, and it is suitable to solve those problems on function approximation, system identification and model recognition.
Online since: October 2014
Authors: Shao Kai Sun, Yan Hui Zhang, He Jia Liu, Jian Ping Wang
The same mechanical loads were used in this paper, and the loaded model was shown in Fig. 4B.
A B Fig. 4 The loaded model Properties of the components are given in Table 1.
Highlight the static pressure affect of Gama nail.
Acknowledge This work was funded by the National Natural Science Foundation of China (Grant No. 51175153) and the National Natural Science Foundation of China (Grant No. 31370999) Reference [1]K S Poh, K Lingaraj, Complications and their risk factors following hip fracture surgery, Journal of orthopaedic surgery (Hong Kong), 2013,21: 154-7
Risk of mortality and predisposing factors after osteoporotic hip fracture: a one-year follow-up study, Aging clinical and experimental research, 2012,24(2): 181-187
A B Fig. 4 The loaded model Properties of the components are given in Table 1.
Highlight the static pressure affect of Gama nail.
Acknowledge This work was funded by the National Natural Science Foundation of China (Grant No. 51175153) and the National Natural Science Foundation of China (Grant No. 31370999) Reference [1]K S Poh, K Lingaraj, Complications and their risk factors following hip fracture surgery, Journal of orthopaedic surgery (Hong Kong), 2013,21: 154-7
Risk of mortality and predisposing factors after osteoporotic hip fracture: a one-year follow-up study, Aging clinical and experimental research, 2012,24(2): 181-187
Online since: July 2019
Authors: Zhi Xun Wen, Ye Da Lian, Lu Liu, Zhuang Zhuang Xu, Qian Yin
The critical distance method with the stress concentration factor around the aperture can accurately predict the fatigue life.
1.
The structure of turbine blade is complex, the existence of film-cooling hole seriously reduces the overall performance of the structure, and the arrangement and diameter of hole have a significant impact on the cooling efficiency and mechanical properties of the turbine blade.
The critical distance method with the stress concentration factor around the aperture can accurately predict the fatigue life.
[5] Liu D S, et al, Tensile Property of a Modeling Specimen of DD6 Single Crystal Cooling Turbine Blade [J] Rare Metal Materials and Engineering, 2012, 41(8):1362-1366
Journal of Mechanical Engineering, 2013:59-66
The structure of turbine blade is complex, the existence of film-cooling hole seriously reduces the overall performance of the structure, and the arrangement and diameter of hole have a significant impact on the cooling efficiency and mechanical properties of the turbine blade.
The critical distance method with the stress concentration factor around the aperture can accurately predict the fatigue life.
[5] Liu D S, et al, Tensile Property of a Modeling Specimen of DD6 Single Crystal Cooling Turbine Blade [J] Rare Metal Materials and Engineering, 2012, 41(8):1362-1366
Journal of Mechanical Engineering, 2013:59-66