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Online since: February 2013
Authors: Wei Le Geng, Yao Ji Li, Xiao Shuang Li
Geological conditions are the key factor of Dust generation.
Analyzing the agentia used in the process of mine beneficiation and washing process such as washing, crushing and ore concentrate grade, evaluating the environmental impact of the crushing and ore concentrate dust, screening not mutually compatibility factor of dust suppression, optimizing dust suppression factor with properties of coagulation, moisture and water retention.
Firstly, select coagulation, hygroscopic and water retention factor.
We tested reaction, anti-evaporation and anti-abrasive performance and examined the coagulation effect of dust particle, and moisture absorption, water retention properties.
The main technical objectives l Excogitate an ecological type of broad-spectrum dust suppression method which is suitable for the four phosphate mines of YPC and has higher properties on bond, moisture, water and resistant to high temperatures (ground temperature 45°C).
Analyzing the agentia used in the process of mine beneficiation and washing process such as washing, crushing and ore concentrate grade, evaluating the environmental impact of the crushing and ore concentrate dust, screening not mutually compatibility factor of dust suppression, optimizing dust suppression factor with properties of coagulation, moisture and water retention.
Firstly, select coagulation, hygroscopic and water retention factor.
We tested reaction, anti-evaporation and anti-abrasive performance and examined the coagulation effect of dust particle, and moisture absorption, water retention properties.
The main technical objectives l Excogitate an ecological type of broad-spectrum dust suppression method which is suitable for the four phosphate mines of YPC and has higher properties on bond, moisture, water and resistant to high temperatures (ground temperature 45°C).
Online since: April 2010
Authors: Anatoly Yakovlevich Fishman, Robert Grigorievich Zakharov, S.A. Petrova, M.A. Ivanov
An investigation has been undertaken of the structural characteristics of the manganese
oxides to understand these characteristics affected by mechanochemical treatment conditions.
Major attention was paid to a direction of the redox processes and peculiarities of structural properties resulted from the metastable nature of the neogenic phase states.
For grinding described in detail in [2, 3] the AGO-2 planetary mill (2 hardened steel drums of 150ml each) with centrifugal factor g = 60 [4] was used.
Mechanical treatment was started after preliminary drum fettling in a continuous mode or with periodic breaks of a mill.
It was also revealed, special additional mechanical treatment of the mixture during 1-2 minutes led to a complete reduction of the MnO2 oxide and formation of a single-phase Mn2O3 nanopowder.
Major attention was paid to a direction of the redox processes and peculiarities of structural properties resulted from the metastable nature of the neogenic phase states.
For grinding described in detail in [2, 3] the AGO-2 planetary mill (2 hardened steel drums of 150ml each) with centrifugal factor g = 60 [4] was used.
Mechanical treatment was started after preliminary drum fettling in a continuous mode or with periodic breaks of a mill.
It was also revealed, special additional mechanical treatment of the mixture during 1-2 minutes led to a complete reduction of the MnO2 oxide and formation of a single-phase Mn2O3 nanopowder.
Online since: July 2020
Authors: Hamidah Mohd Saman, Mohd Hisbany Mohd Hashim, Amirah Mohamad Juri, Kartini Kamaruddin, Siti Nurul Ain Ali
However, EPS concrete has substantially affected the transition zone of elastic behavior of the element.
Previously, some researchers have focused on mechanical properties of lightweight concrete using foaming agent and replacing some part of the standard aggregate used that having less in density with cost-efficient materials [1,2].
However, the characteristic of low-density aggregate influenced the modulus of elasticity of lightweight concrete and affected the bonding with cement-paste.
Chen [6] demonstrated that the addition of silica fume, fly ash or bonding additives to the concrete matrix has been significantly improved the uniformity of EPS and mechanical properties of the concrete.
Although several studies conducted on the mechanical properties and prediction the elastic modulus by simulation of lightweight concrete, only a few focused in the literature to predict the modulus of elasticity from existing models in codes of practice and limited empirical models have been proposed especially for dry press EPS concrete.
Previously, some researchers have focused on mechanical properties of lightweight concrete using foaming agent and replacing some part of the standard aggregate used that having less in density with cost-efficient materials [1,2].
However, the characteristic of low-density aggregate influenced the modulus of elasticity of lightweight concrete and affected the bonding with cement-paste.
Chen [6] demonstrated that the addition of silica fume, fly ash or bonding additives to the concrete matrix has been significantly improved the uniformity of EPS and mechanical properties of the concrete.
Although several studies conducted on the mechanical properties and prediction the elastic modulus by simulation of lightweight concrete, only a few focused in the literature to predict the modulus of elasticity from existing models in codes of practice and limited empirical models have been proposed especially for dry press EPS concrete.
Online since: July 2020
Authors: Rizwan Nasir, Hilmi Mukhtar, Dzeti Farhah Mohshim, Nabilah Fazil
Natural gas purification to remove carbon dioxide (CO2) using efficient separation technology is essential due to its corrosive properties which will damage the pipeline and consequently affect the entire processing environment.
The hard polyamide segments give mechanical strength and the flexible polyether segments provide high permeability caused by the ether linkage that supplies higher chain mobility [9].
The use of a low concentration of CNT as an inorganic filler can substantially increase the mechanical strength of polymeric materials [11].
[3] Robeson, L.M.J.J.o.m.s., Correlation of separation factor versus permeability for polymeric membranes. 1991. 62(2): p. 165-185
[11] Coleman, J.N., et al., Improving the mechanical properties of single-walled carbon nanotube sheets by intercalation of polymeric adhesives.
The hard polyamide segments give mechanical strength and the flexible polyether segments provide high permeability caused by the ether linkage that supplies higher chain mobility [9].
The use of a low concentration of CNT as an inorganic filler can substantially increase the mechanical strength of polymeric materials [11].
[3] Robeson, L.M.J.J.o.m.s., Correlation of separation factor versus permeability for polymeric membranes. 1991. 62(2): p. 165-185
[11] Coleman, J.N., et al., Improving the mechanical properties of single-walled carbon nanotube sheets by intercalation of polymeric adhesives.
Online since: August 2014
Authors: Can Yang, Xi Ping Li, Ning Ning Gong
The production efficiency and the part quality are seriously affected by the temperature and its distribution uniformity on the mold cavity surface.
The number of channels, diameter of channel (), distances between channels () and distance from the channels to cavity surface () shown in Fig.1 are all parameters affecting the heating transfer in the mold.
The properties of the cavity plate material used in this paper are listed in Table 1.
Generally, high heating/cooling efficiency and good temperature distribution uniformity of the mold cavity surface are the ultimate goals for ensuring the mold strength, the product appearance and mechanical properties.
(2) The temperature distribution uniformity is one of important factors that influence the products quality.
The number of channels, diameter of channel (), distances between channels () and distance from the channels to cavity surface () shown in Fig.1 are all parameters affecting the heating transfer in the mold.
The properties of the cavity plate material used in this paper are listed in Table 1.
Generally, high heating/cooling efficiency and good temperature distribution uniformity of the mold cavity surface are the ultimate goals for ensuring the mold strength, the product appearance and mechanical properties.
(2) The temperature distribution uniformity is one of important factors that influence the products quality.
Online since: February 2026
Authors: Wasim M. K. Helal, Wei Jie Zheng
To ensure optimal performance, it’s important to choose materials that possess strong mechanical properties.
Compared to other materials used in Fused Deposition Modeling (FDM), ABS offers excellent mechanical properties [34].
The material properties of the transmission shaft, juicer screw and juicer knife net are shown in Table 1.
Material properties of key components of a small household juicer.
Wang, Lei Xu, Mechanical properties and creep strain of Q355 cold-formed steel at elevated temperature, Journal of Constructional Steel Research. (2021)180:106577.
Compared to other materials used in Fused Deposition Modeling (FDM), ABS offers excellent mechanical properties [34].
The material properties of the transmission shaft, juicer screw and juicer knife net are shown in Table 1.
Material properties of key components of a small household juicer.
Wang, Lei Xu, Mechanical properties and creep strain of Q355 cold-formed steel at elevated temperature, Journal of Constructional Steel Research. (2021)180:106577.
Online since: March 2007
Authors: Volker Schwinn, Wolfgang Schuetz, Peter Fluess, Juergen Bauer
At the same time other properties like toughness and weldability must be
kept or even be improved.
Metallurgical mechanisms which permit the achievement of the demanded mechanical and technological properties must be activated by alloying and at the different plate making stages.
Tools and mechanisms to effect properties are shown in schematic and exemplary form in Fig. 2.
Okaguchi et al.: Development and Mechanical Properties of X120 Linepipe, Proc. 13th Int.
Schwinn: Microstructure and properties of TMCP-steels, Proc. 2 nd Int.
Metallurgical mechanisms which permit the achievement of the demanded mechanical and technological properties must be activated by alloying and at the different plate making stages.
Tools and mechanisms to effect properties are shown in schematic and exemplary form in Fig. 2.
Okaguchi et al.: Development and Mechanical Properties of X120 Linepipe, Proc. 13th Int.
Schwinn: Microstructure and properties of TMCP-steels, Proc. 2 nd Int.
Online since: May 2020
Authors: Vivek V. Patel, Gopinath Thirunavukarasu, Sukumar Kundu, Alankar Alankar
The joints processed at 1000 °C using Nb interlayer were poor in mechanical properties due to the presence of FeNb intermetallics.
Mechanical properties of DCJs processed using 4-MPa bonding pressure at 875 °C for different bonding time interval.
Fu, Microstructure and mechanical properties of bio-inspired Ti/Al/Al-Cf multi-layered composites, Adv.
Yang, Joining of graphite to copper with Nb interlayer: microstructure and mechanical properties, Adv.
Wu, Microstructure and mechanical properties of sputter deposited Ni/Ni3Al multilayer films at elevated temperature, Appl.
Mechanical properties of DCJs processed using 4-MPa bonding pressure at 875 °C for different bonding time interval.
Fu, Microstructure and mechanical properties of bio-inspired Ti/Al/Al-Cf multi-layered composites, Adv.
Yang, Joining of graphite to copper with Nb interlayer: microstructure and mechanical properties, Adv.
Wu, Microstructure and mechanical properties of sputter deposited Ni/Ni3Al multilayer films at elevated temperature, Appl.
Online since: May 2019
Authors: Chaiwat Chaimahapuk, Prakorb Chartpuk
Analysis of Stress Distribution for Powder Compression Molding by Finite Element Method
Prakorb Chartpuka* and Chaiwat Chaimahapukb
1381 Department of mechanical engineering, Faculty of engineering, Rajamangala University of Technology Phra Nakhon, Bangsue, Bangkok 10800, Thailand
aprakorb.c@rmutp.ac.th, bchaiwat-c@rmutp.ac.th
Keywords: stress distribution, powder compression mold, finite element method
Abstract.
There are several factors that affect the density in the powder compression process; the major problem is the friction between the powder and the mold wall which result in inconsistent density throughout the net-shaping.
Both models are symmetric under the ultrasonic waves rightly affecting the mold body.
Concerning the Pre-processing, 3D model has been prepared, designed, and created with the SolidWorks program according to the material properties as shown in Table 1.
Table 1 Properties of material [4] Materials AISI 52100 AISI 1045 Elastic Modulus 210 GPa 205 GPa Poisson's Ratio 0.30 0.32 Shear Modulus 80 GPa 80 GPa Mass Density 7,810 kg/m3 7,850 kg/m3 Tensile Strength 2,240 MPa 1,110 MPa Yield Strength 2,033 MPa 710 MPa Hardness, Rockwell C 64 HRC - Table 2 Pre-processing parameters Parameters Form A Form B Form C Maximum element size (mm) 10 10 10 Minimum element size (mm) 2 2 2 Element size for control mesh (mm) 3 3 3 Total element 79,449 79,005 52,865 Total node 53,600 51,576 40,748 Applied normal force (N) 50,000 50,000 50,000 Maximum distortion energy equation in the form of stress components, shown in equation 1 (1) Average stress equation on the cross-sectional area, perpendicular to the direction of force applied, shown in equation 2 (2) Experimental Setup and Procedure for the Measurement To test the stress value, the strain gages are set
There are several factors that affect the density in the powder compression process; the major problem is the friction between the powder and the mold wall which result in inconsistent density throughout the net-shaping.
Both models are symmetric under the ultrasonic waves rightly affecting the mold body.
Concerning the Pre-processing, 3D model has been prepared, designed, and created with the SolidWorks program according to the material properties as shown in Table 1.
Table 1 Properties of material [4] Materials AISI 52100 AISI 1045 Elastic Modulus 210 GPa 205 GPa Poisson's Ratio 0.30 0.32 Shear Modulus 80 GPa 80 GPa Mass Density 7,810 kg/m3 7,850 kg/m3 Tensile Strength 2,240 MPa 1,110 MPa Yield Strength 2,033 MPa 710 MPa Hardness, Rockwell C 64 HRC - Table 2 Pre-processing parameters Parameters Form A Form B Form C Maximum element size (mm) 10 10 10 Minimum element size (mm) 2 2 2 Element size for control mesh (mm) 3 3 3 Total element 79,449 79,005 52,865 Total node 53,600 51,576 40,748 Applied normal force (N) 50,000 50,000 50,000 Maximum distortion energy equation in the form of stress components, shown in equation 1 (1) Average stress equation on the cross-sectional area, perpendicular to the direction of force applied, shown in equation 2 (2) Experimental Setup and Procedure for the Measurement To test the stress value, the strain gages are set
Online since: May 2012
Authors: Yan Jun Chang, Ke Shi Zhang, Zhuo Li
The fiber/matrix interfacial domain is a decisive constituent of fiber reinforced ceramic matrix composites (CMCs), and a high-performance composite material must be provided with proper interphase which has appropriate thermodynamic and mechanical properties.
The initial microcracks in SiC matrix make the interphase behavior and overall mechanical response of woven composites more complex.
The material properties of each component were given as Tab.1, and the interphase and SiC matrix were isotropic, and C fiber was anisotropic.
The cohesive element was used to simulate the mechanical properties of the interphase, and the parameters of the CZM were adopted the data stated above.
The interphase crack can extended to the bottom and top of the FEM model with weak properties of interphase.
The initial microcracks in SiC matrix make the interphase behavior and overall mechanical response of woven composites more complex.
The material properties of each component were given as Tab.1, and the interphase and SiC matrix were isotropic, and C fiber was anisotropic.
The cohesive element was used to simulate the mechanical properties of the interphase, and the parameters of the CZM were adopted the data stated above.
The interphase crack can extended to the bottom and top of the FEM model with weak properties of interphase.