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Online since: September 2013
Authors: Yu Peng Chen, Xing Hua Fu, Hai Tao Yu, Wen Hong Tao, Bao Li Du
Physical properties of glazed hollow beads
Performance
Packing density[kg/m³]
Particle size[mm]
Water absorption rate[%]
Index
104
﹤1.25
42.5
1.2 Mixture ratio design
Designed according to L9(34), orthogonal experiments are on the three factors and three levels, examining the effect of various factors on dry density and compressive strength of the insulation mortar.
Experimental factors and levels selected are shown in Table 2.
Analysis of structure and morphology 3.1 Analysis of the morphology and structure of pores in the mortar Sizes, morphology and distribution of pores in foam glazed hollow bead are keys to influencing mechanical properties and thermal insulation properties.
The whole system has a certain ability to resist damage, and improve the overall mechanical properties of thermal insulation mortar. 4.
Conclusions (1) Among the three factors of glazed hollow beads content, water-cement ratio and foaming agent content, water-cement ratio is the most important factor for affecting the performances of the foam glazed hollow beads thermal insulation mortar.
Experimental factors and levels selected are shown in Table 2.
Analysis of structure and morphology 3.1 Analysis of the morphology and structure of pores in the mortar Sizes, morphology and distribution of pores in foam glazed hollow bead are keys to influencing mechanical properties and thermal insulation properties.
The whole system has a certain ability to resist damage, and improve the overall mechanical properties of thermal insulation mortar. 4.
Conclusions (1) Among the three factors of glazed hollow beads content, water-cement ratio and foaming agent content, water-cement ratio is the most important factor for affecting the performances of the foam glazed hollow beads thermal insulation mortar.
Online since: January 2013
Authors: Jin Yang Li, Hong Xia, Shou Yu Cheng
All kinds of sensor with mechanical properties often can go wrong in nuclear power plant.
Any a control equipment failure, especially sensor with mechanical properties failure will directly affect the normal operation of the nuclear power plant.
At present, nuclear power plant mainly uses the hardware redundant fault tolerant control method to prevent sensor with mechanical properties failure.
According to the result of FDD adjustment control scheme that can improve control system for processing capacity of fault factors and improve the performance of fault tolerant control.
The conclusion In view of the sensor with mechanical properties fault in nuclear power plant control system, it puts forward a kind of active fault tolerant control method based on the BP neural network.
Any a control equipment failure, especially sensor with mechanical properties failure will directly affect the normal operation of the nuclear power plant.
At present, nuclear power plant mainly uses the hardware redundant fault tolerant control method to prevent sensor with mechanical properties failure.
According to the result of FDD adjustment control scheme that can improve control system for processing capacity of fault factors and improve the performance of fault tolerant control.
The conclusion In view of the sensor with mechanical properties fault in nuclear power plant control system, it puts forward a kind of active fault tolerant control method based on the BP neural network.
Online since: June 2011
Authors: Abdelahad Chbihi, Xavier Sauvage, Didier Blavette
Atomic scale investigation of Cr precipitation in Cu and related mechanical properties.
Blavette1,2 1University of Rouen, GPM, UMR CNRS 6634, BP 12, Avenue de l’Université, 76801 Saint-Etienne du Rouvray, France 2 Institut Universitaire de France a Corresponding author: xavier.sauvage@univ-rouen.fr Key words: Precipitation; Copper; Chromium; mechanical properties; Segregation; Atom Probe Tomography Abstract The early stages of precipitation of Cr rich precipitates were investigated by Atom Probe Tomography (APT) in a Cu-1Cr-0.1Zr (wt.%).
A precipitation sequence is proposed and the relationship between mechanical properties and microstructure is discussed.
Discussion about the precipitation sequence and the related mechanical properties Thanks to APT analyses, three kinds of precipitates were found: spherical, ellipsoid and plate shape.
Further aging up to 10h leads to a decrease of the precipitate density by a factor of four but surprisingly the yield stress further increases.
Blavette1,2 1University of Rouen, GPM, UMR CNRS 6634, BP 12, Avenue de l’Université, 76801 Saint-Etienne du Rouvray, France 2 Institut Universitaire de France a Corresponding author: xavier.sauvage@univ-rouen.fr Key words: Precipitation; Copper; Chromium; mechanical properties; Segregation; Atom Probe Tomography Abstract The early stages of precipitation of Cr rich precipitates were investigated by Atom Probe Tomography (APT) in a Cu-1Cr-0.1Zr (wt.%).
A precipitation sequence is proposed and the relationship between mechanical properties and microstructure is discussed.
Discussion about the precipitation sequence and the related mechanical properties Thanks to APT analyses, three kinds of precipitates were found: spherical, ellipsoid and plate shape.
Further aging up to 10h leads to a decrease of the precipitate density by a factor of four but surprisingly the yield stress further increases.
Online since: April 2012
Authors: Gobwute Rujijanagul, P. Jarupoom, Kamonpan Pengpat, T. Tunkasiri, N. Lertcumfu
Therefore, there have been many attempts to improve the mechanical and physical properties of sintered HA [1, 3, 4].
It is reported that the sintering temperature and atmosphere are important factors that could alter the strength and toughness of HA [10].
The formation of these phases affects to the mechanical properties of HA ceramics[11].
The additives also affect to the properties of the HA ceramics.
The present work aimed to study effects of metal oxide nano-particle on physical and mechanical properties of HA ceramics.
It is reported that the sintering temperature and atmosphere are important factors that could alter the strength and toughness of HA [10].
The formation of these phases affects to the mechanical properties of HA ceramics[11].
The additives also affect to the properties of the HA ceramics.
The present work aimed to study effects of metal oxide nano-particle on physical and mechanical properties of HA ceramics.
Online since: June 2017
Authors: Ferdinand Dobeš, Luboš Kloc, Petr Dymáček
Relations for an assessment of conventional mechanical properties from quantities obtained by small punch test are presented.
Also it has been applied in determination of local mechanical properties such as heat affected zones of welds [4] or hydrogen embrittlement of steel [5] and characterization of mechanical properties of steels, light alloys and composites [6, 7, 8, 9].
Harling: The Development of a Miniaturized Disk Bend Test for the Determination of Post-irradiation Mechanical Properties, J.
Suárez: Estimation of the mechanical properties of metallic materials by means of the small punch test, J.
Dobeš: Analysis of potential factors influencing the relation between small punch and conventional creep tests, Metallurgical Journal (Hutnické listy) 63 (2010) 50–53
Also it has been applied in determination of local mechanical properties such as heat affected zones of welds [4] or hydrogen embrittlement of steel [5] and characterization of mechanical properties of steels, light alloys and composites [6, 7, 8, 9].
Harling: The Development of a Miniaturized Disk Bend Test for the Determination of Post-irradiation Mechanical Properties, J.
Suárez: Estimation of the mechanical properties of metallic materials by means of the small punch test, J.
Dobeš: Analysis of potential factors influencing the relation between small punch and conventional creep tests, Metallurgical Journal (Hutnické listy) 63 (2010) 50–53
Online since: August 2013
Authors: Min Zheng Jiang, Yu Miao Cai, Da Xing Sun, Su Ling Wang, Xin Pu Shen
Therefore, the difference of mechanical properties of materials exacerbates material damage when the crack cross different elastic material interface and the damage characteristics can change the damage state uniform material.
Therefore, the plastic behavior of sand-mudstone material is one of the important factors affecting interfacial damage.
Conclusions The composites of three point bending beam test and theoretical research show that, the crack will deflect because of the difference of mechanical properties of materials when the crack perpendicular to different elastic materials interface expands.
Therefore, plastic behavior of sand-mudstone material is one of the important factors affecting the direction of crack propagation.
Analysis on the Influence Factors of Fracture Height of Sandstone Gas Reservoir Fracturing[J].
Therefore, the plastic behavior of sand-mudstone material is one of the important factors affecting interfacial damage.
Conclusions The composites of three point bending beam test and theoretical research show that, the crack will deflect because of the difference of mechanical properties of materials when the crack perpendicular to different elastic materials interface expands.
Therefore, plastic behavior of sand-mudstone material is one of the important factors affecting the direction of crack propagation.
Analysis on the Influence Factors of Fracture Height of Sandstone Gas Reservoir Fracturing[J].
Online since: March 2008
Authors: Bai Mei Tan, J.Y. Yuan, X.H. Niu, H.L. Shi, Yu Ling Liu, Chun Xiang Cui
In this paper, the CMP mechanism and
the effect of abrasive on SiO2 dielectric were analyzed; the different factors of affecting the CMP
were analyzed.
CMP is an integrated process including chemical effect and mechanical effect[4].
It takes the function of mechanical grinding. ②Transmitting material.
To get the high remove rate and control the metallic ion content of the slurry, pH conditioner should have similar property with NH4OH but no volatility.
Summary The removal rate and surface perfectibility of dielectric film CMP are influenced by many factors, such as pH value, abrasive concentration of slurry and slurry flow.
CMP is an integrated process including chemical effect and mechanical effect[4].
It takes the function of mechanical grinding. ②Transmitting material.
To get the high remove rate and control the metallic ion content of the slurry, pH conditioner should have similar property with NH4OH but no volatility.
Summary The removal rate and surface perfectibility of dielectric film CMP are influenced by many factors, such as pH value, abrasive concentration of slurry and slurry flow.
Online since: December 2013
Authors: Masanori Kikuchi, N. Nik Abdullah, Ahmad Kamal Ariffin, M.R.M. Akramin, S. Abdullah
Finally, the change of the stress intensity factors along the crack front was investigated based on simulation results.
The global mesh is not affected by the changing of local mesh size.
Improvement need to be made for simulation since Paris coefficient C, initial crack length and other material properties cannot be treated deterministically.
Li: Crack growth analysis in a weld-heat-affected zone using S-version FEM.
Yulong: Crack growth analysis in weld-heat affected zone using S-Version FEM. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (2010)
The global mesh is not affected by the changing of local mesh size.
Improvement need to be made for simulation since Paris coefficient C, initial crack length and other material properties cannot be treated deterministically.
Li: Crack growth analysis in a weld-heat-affected zone using S-version FEM.
Yulong: Crack growth analysis in weld-heat affected zone using S-Version FEM. in American Society of Mechanical Engineers, Pressure Vessels and Piping Division (2010)
Online since: March 2006
Authors: Nobusuke Hattori, Takamitsu Shimizu, Shinichi Nishida, Priyo Tri Iswanto
It is considered that the static
mechanical properties relate to the mean value of micro-structures and the fatigue strength relates to
the weakest portion of structures.
Therefore, the objects of the present study are to investigate the pulsating fatigue property of ferritic and martensitic stainless steel with comparing the different of the two materials in fatigue strength and fracture characteristics Experimental Procedures The static mechanical properties: Tables 1 and 2 list the chemical composition and mechanical properties of two kinds of materials (SUS430 and SUS410), respectively.
The reason for this phenomenon may be explained by the main factors of fatigue limit and tensile strength.
Although the static mechanical properties of FH2 are better than that of FH1, the fatigue strength of them is almost the same between FH1 and FH2
(2) The reason for this phenomenon may be explained by the main factors that affect the mechanical and fatigue properties.
Therefore, the objects of the present study are to investigate the pulsating fatigue property of ferritic and martensitic stainless steel with comparing the different of the two materials in fatigue strength and fracture characteristics Experimental Procedures The static mechanical properties: Tables 1 and 2 list the chemical composition and mechanical properties of two kinds of materials (SUS430 and SUS410), respectively.
The reason for this phenomenon may be explained by the main factors of fatigue limit and tensile strength.
Although the static mechanical properties of FH2 are better than that of FH1, the fatigue strength of them is almost the same between FH1 and FH2
(2) The reason for this phenomenon may be explained by the main factors that affect the mechanical and fatigue properties.
Online since: August 2016
Authors: Kwan Ho Seo, Dong Won Lee, Gi Hong Kim, Do Young Kim, Dong Gug Kang, Gi Myeong Nam
Rubber materials are required to have some specific mechanical properties depending on their operating conditions.
The aging properties of the specimens were examined by measuring their mechanical properties.
The oil resistance properties of the specimens were examined by measuring their mechanical properties and degree of volume change.
Cure properties of NBR compounds of various ACN contents by rheometer at 175°C NBR-1 NBR-2 NBR-3 NBR-4 NBR-5 NBR-6 T2 (sec) 58 61 56 57 56 59 T90 (sec) 97 113 120 118 137 156 Mechanical properties and oil resistance Fig. 1, 2, 3 shows the mechanical properties of the NBR compounds after heat aging or immersion in ASTM#1, IRM903 oil for 72 hours at 100°C.
A major factor of the influence of oil resistance properties is polymer molecular structure and cross-linking.
The aging properties of the specimens were examined by measuring their mechanical properties.
The oil resistance properties of the specimens were examined by measuring their mechanical properties and degree of volume change.
Cure properties of NBR compounds of various ACN contents by rheometer at 175°C NBR-1 NBR-2 NBR-3 NBR-4 NBR-5 NBR-6 T2 (sec) 58 61 56 57 56 59 T90 (sec) 97 113 120 118 137 156 Mechanical properties and oil resistance Fig. 1, 2, 3 shows the mechanical properties of the NBR compounds after heat aging or immersion in ASTM#1, IRM903 oil for 72 hours at 100°C.
A major factor of the influence of oil resistance properties is polymer molecular structure and cross-linking.