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Online since: March 2012
Authors: Nai Yan Zhang, Yue Guo Shen, Xiao Qi Li
These materials have attracted much attention in medical and mechanical engineering fields.
Actually, we further tried to prepare PDI-4 (with 12 mL water in the feed compositions) hydrogel, but the mechanical properties of the resulted hydrogel were too porous to be characterized.
The deswelling process is complicated because many factors influence and control the deswelling rate.
There are two factors accounting for this shrinking behavior.
Considering these properties, it is expected that macroporous and intelligent thermosensitive responsive of P(DEA-co-IA) hydrogels could be useful in biomedical fields for intelligent-responsive drug delivery systems.
Actually, we further tried to prepare PDI-4 (with 12 mL water in the feed compositions) hydrogel, but the mechanical properties of the resulted hydrogel were too porous to be characterized.
The deswelling process is complicated because many factors influence and control the deswelling rate.
There are two factors accounting for this shrinking behavior.
Considering these properties, it is expected that macroporous and intelligent thermosensitive responsive of P(DEA-co-IA) hydrogels could be useful in biomedical fields for intelligent-responsive drug delivery systems.
Online since: November 2011
Authors: Cheng Xi
Because of many precious physical, chemical and mechanical properties, vanadium is widely used in modern industrial technology, which calls for the strong demand and leads to a rapid development in vanadium extraction technology.
Curve 1-Leaching percent as residue Curve 2-Leaching percent as liquid Fig.2 The effect of curing time on vanadium leaching percent According to Fig.2, vanadium leaching percent is greatly affected by curing time, and rise with the extension of time.
Taken various factors into account, the optimum curing time is 24h.
Curve 1—Leaching percent as residue Curve 2—Leaching percent as liquid Fig.4 The effect of ore size on vanadium leaching percent According to Fig.4, vanadium leaching percent is greatly affected by ore size, the smaller the ore size, the higher the vanadium leaching percent.
Curve 1-Leaching percent as residue Curve 2-Leaching percent as liquid Fig.2 The effect of curing time on vanadium leaching percent According to Fig.2, vanadium leaching percent is greatly affected by curing time, and rise with the extension of time.
Taken various factors into account, the optimum curing time is 24h.
Curve 1—Leaching percent as residue Curve 2—Leaching percent as liquid Fig.4 The effect of ore size on vanadium leaching percent According to Fig.4, vanadium leaching percent is greatly affected by ore size, the smaller the ore size, the higher the vanadium leaching percent.
Online since: February 2012
Authors: Yuan Sun, Shang Min Zheng, Shou Xu Song
The influence factors of strength and stiffness on drive axle housing was studied by Fen Yang et al[4], and the improved design of axle housing was analyzed.
The physical properties of the materials are given in Table 1[6].
Fatigue loading, material fatigue properties are defined in this module.
The axle housing is affected by the continuous variation load in the actual work process.
Journal of Mechanical Strength.
The physical properties of the materials are given in Table 1[6].
Fatigue loading, material fatigue properties are defined in this module.
The axle housing is affected by the continuous variation load in the actual work process.
Journal of Mechanical Strength.
Online since: June 2014
Authors: Meda Lavinia Negrutiu, Cosmin Sinescu, Mihai Rominu, Carla Andreea Madaras, Cezar Serban Clonda, Ciprian Ionita, Aurora Antoniac, Adrian G. Podoleanu
The particle size of the alumina may influence the mechanical properties by decreasing agglomeration [24].
Several factors affect the translucency of dental ceramics.
Fracture toughness is the resistance to brittle fracture when a crack is generated by different factors.
The effect of different powder particle size on mechanical properties of sintered alumina, resin- and glass-infused alumina.
Mechanical properties and short-term in-vivo evaluation of yttrium-oxide-partially-stabilized zirconia.
Several factors affect the translucency of dental ceramics.
Fracture toughness is the resistance to brittle fracture when a crack is generated by different factors.
The effect of different powder particle size on mechanical properties of sintered alumina, resin- and glass-infused alumina.
Mechanical properties and short-term in-vivo evaluation of yttrium-oxide-partially-stabilized zirconia.
Online since: October 2015
Authors: Guang Hui Zhou, Xiang Yang, Zhong Dong Xiao
As is known to us all, cutters have become an important part in modern manufacturing processes and significant factors which not only affect the machining quality, cost and productivity, but also influence energy consumption of the whole product machining process.
The calculation formula of Ct is shown as follow: (6) Where Ft is carbon emission factor [kgCO2/kg], Wt is tool mass, and Tt is Cutter total life.
Table.4 Calculation results Selected cutter End-face groove cutter 01 End-face groove cutter 03 End-face groove cutter 04 Carbon emission quantity Cp/g 186 202 194 Conclusions In order to deal with the problem that the traditional cutter selecting method for part machining cannot meet the requirements of modern green manufacturing satisfactorily, a novel cutter selecting method based on ontology and considering low-carbon influencing factors is proposed in the paper.
R. et al, Influence exerted by tool properties on the energy efficiency during drilling and turning operations.
Journal of Mechanical Engineering,49:pp87-95,2013.
The calculation formula of Ct is shown as follow: (6) Where Ft is carbon emission factor [kgCO2/kg], Wt is tool mass, and Tt is Cutter total life.
Table.4 Calculation results Selected cutter End-face groove cutter 01 End-face groove cutter 03 End-face groove cutter 04 Carbon emission quantity Cp/g 186 202 194 Conclusions In order to deal with the problem that the traditional cutter selecting method for part machining cannot meet the requirements of modern green manufacturing satisfactorily, a novel cutter selecting method based on ontology and considering low-carbon influencing factors is proposed in the paper.
R. et al, Influence exerted by tool properties on the energy efficiency during drilling and turning operations.
Journal of Mechanical Engineering,49:pp87-95,2013.
Online since: February 2013
Authors: Ru Xiong, Ying Jie Qiao, Gui Liang Liu
The history and properties of PWSCC are described in detail by Staehle and Gorman[1].
These alloys were adopted by ASTM and ASME and were used because they provided a useful combination of good mechanical properties, fracture toughness, compatibility with other vessel or piping materials, and corrosion resistance.
The circumstances surrounding these indications are currently being analyzed to understand the factors of fabrication which might have favored the development of such circumferential cracking.
Several factors were cited [9] as contributing to increasing the stress above the threshold, among them the presence of weld defects, a modified design with an increased size of weld deposit, and a possible contribution of thermal fluctuations in the drain lines.
(7) Factors that ameliorate surface residual stresses were fine grinding and stress relief heat treatments.
These alloys were adopted by ASTM and ASME and were used because they provided a useful combination of good mechanical properties, fracture toughness, compatibility with other vessel or piping materials, and corrosion resistance.
The circumstances surrounding these indications are currently being analyzed to understand the factors of fabrication which might have favored the development of such circumferential cracking.
Several factors were cited [9] as contributing to increasing the stress above the threshold, among them the presence of weld defects, a modified design with an increased size of weld deposit, and a possible contribution of thermal fluctuations in the drain lines.
(7) Factors that ameliorate surface residual stresses were fine grinding and stress relief heat treatments.
Online since: February 2011
Authors: Yong Ming Chai, Yun Qi Liu, Bin Dong, Chen Guang Liu
The electrocatalytic properties of Ag/TiO2-NTs for hydrazine oxidation were investigated in details.
Other factors such as the stabilization, the properties of the supporting materials can affect basic properties of the catalysts [15-18].
Among these factors, the morphology and nanostructure of the supporting materials are considered to be the main factors in obtaining high activity of nanoparticles catalysis [19-20].
Nanotubular materials including carbon, metal sulfides and metal oxides have drawn extensive research because of their exceptional electronic and mechanical properties in comparion to bulk materials.
To identify the properties of Ag/TiO2-NTs in N2H4·H2O and to measure the onset potential of hydrazine oxidation, cyclic voltammograms (CV) was performed in the potential between 0 and 0.6 V.
Other factors such as the stabilization, the properties of the supporting materials can affect basic properties of the catalysts [15-18].
Among these factors, the morphology and nanostructure of the supporting materials are considered to be the main factors in obtaining high activity of nanoparticles catalysis [19-20].
Nanotubular materials including carbon, metal sulfides and metal oxides have drawn extensive research because of their exceptional electronic and mechanical properties in comparion to bulk materials.
To identify the properties of Ag/TiO2-NTs in N2H4·H2O and to measure the onset potential of hydrazine oxidation, cyclic voltammograms (CV) was performed in the potential between 0 and 0.6 V.
Online since: December 2010
Authors: Shen Bo Yu, Hui Dong, Xin Feng, Jing Yuan
Analysis on Cogging Torque of Permanent Magnet Synchronous Motor for NC Machine Tool Servo-System
Shenbo Yu1,a, Hui Dong1,b, Xin Feng1,c, Jing Yuan1,d
1School of Mechanical Engineering, Shenyang University of Technology, Shenyang, P.
Simulation models of PMSM are established to complete coupled calculation between magnetic fields and mechanical dynamics.
A “goodness” factor, which is proportional to the slot number and the pole number and inversely proportional to their smallest common multiple, was introduced by Zhu, Z.Q..
The conclusion of the higher the “goodness” factor the larger the cogging torque was drawn[4].
The properties of motor, for instances, heating-up, vibration, noise and torque, are closely influenced by the slot width, while cogging torque is obviously affected by configuration of the stator slots opening.
Simulation models of PMSM are established to complete coupled calculation between magnetic fields and mechanical dynamics.
A “goodness” factor, which is proportional to the slot number and the pole number and inversely proportional to their smallest common multiple, was introduced by Zhu, Z.Q..
The conclusion of the higher the “goodness” factor the larger the cogging torque was drawn[4].
The properties of motor, for instances, heating-up, vibration, noise and torque, are closely influenced by the slot width, while cogging torque is obviously affected by configuration of the stator slots opening.
Online since: January 2015
Authors: Adam Kozakiewicz, Stanisław Kachel
The cloud of points for the newly designed UAV aircraft
On the other hand, the engineering process for new designs starts from analysis of aerodynamic and technical properties for the desired object with the aim to clearly define such properties during the early phase of development.
One of significant factors that affect competitiveness of the parametrical engineering approach is the fact that the final model is developed as a superposition of parametrical objects that make up the master model (Fig. 3).
The engineering concept that assumes employment of a master model frequently leads to the need to altering aerodynamic and design properties during the early phase of the object design, which enables abbreviations of the overall time until the final product is released.
Presentation of the design concept Adjustment of variables Aerodynamic properties.
Figure 5 presents models of lattices for aircrafts where the aerodynamic properties of them were analyzed by means of the vortex lattices method.
One of significant factors that affect competitiveness of the parametrical engineering approach is the fact that the final model is developed as a superposition of parametrical objects that make up the master model (Fig. 3).
The engineering concept that assumes employment of a master model frequently leads to the need to altering aerodynamic and design properties during the early phase of the object design, which enables abbreviations of the overall time until the final product is released.
Presentation of the design concept Adjustment of variables Aerodynamic properties.
Figure 5 presents models of lattices for aircrafts where the aerodynamic properties of them were analyzed by means of the vortex lattices method.
Online since: December 2018
Authors: Sorin Ion Munteanu, Béla Varga, Camelia GABOR, Mihaela Cosnita, Daniel Munteanu, Ioana Ghiuta, Andrea Gatto, Elena Bassoli, Maria Covei, Mihai Alin Pop, Daniel Cristea, Tibor Bedo
The automotive, aerospace and marine fields are the major industries where titanium alloys are used, due to their special physical, chemical and mechanical properties [5,6].
Yan Long et al. pointed out the influence of ball milling time on the microstructure and alloy properties [3,13].
Fujiwara et al. have also presented results on the Ti6Al4V alloy, subjected to severe plastic deformation, followed by sintering using the Hot Roll Sintering process, in order to improve the mechanical properties.
Fujiwara et al., Outstanding Mechanical Properties in the Materials with a Nano / Meso Hybrid Microstructure, Mater.
Abou Zied, Influence of Milling Time on the Microstructure and Mechanical Properties of Nanostructured Al–7% Si alloy, IJENS 11 (2011) 164-170
Yan Long et al. pointed out the influence of ball milling time on the microstructure and alloy properties [3,13].
Fujiwara et al. have also presented results on the Ti6Al4V alloy, subjected to severe plastic deformation, followed by sintering using the Hot Roll Sintering process, in order to improve the mechanical properties.
Fujiwara et al., Outstanding Mechanical Properties in the Materials with a Nano / Meso Hybrid Microstructure, Mater.
Abou Zied, Influence of Milling Time on the Microstructure and Mechanical Properties of Nanostructured Al–7% Si alloy, IJENS 11 (2011) 164-170