Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2012
Authors: Yang Yu, Yan Yan Fu, Xiao Yun Song, Xi Guang Deng, Rui Liu, Song Xiao Hui, Wen Jun Ye
The solution treated materials were aging heat treated (STA) by heating to a temperature within the range 500℃ to 620 ℃, holding at heat for the time within the range 4 hours to 20 hours, and cool to room temperature.
As shown in Fig. 3, similar microstructures can be obtained by the same STA treatment processes, though the materials are rolled by different routes.
Change of material selection criterion and development of high damage-tolement titanium alloy.
Chiniese Journal of Rare Metals, 30, (2006) 850-855
Material Science and Engineering A, 243, (1998) 109-118
As shown in Fig. 3, similar microstructures can be obtained by the same STA treatment processes, though the materials are rolled by different routes.
Change of material selection criterion and development of high damage-tolement titanium alloy.
Chiniese Journal of Rare Metals, 30, (2006) 850-855
Material Science and Engineering A, 243, (1998) 109-118
Online since: September 2013
Authors: Hai Long Zhang, Yong Heng Chen, Jian Ying Qi, Bi Gui Lin, Jian De Fang
The world bank reported Chinese economy will triple to quadruple its materials consumption over the next 30 to 50 years[1].It means that china will meet a great challenge in disposal those wastes .
Materials and methods Sample collection and digestion Total suspended particulates(TSP) (N=6×3) were collected in 2011 from the surrounding of the Nanshan MSWI in Shenzhen(Fig.1), a mega-city located in southeast China.
[5] Chang M B, Huang C K, Wu H T, et al.Characteristics of heavy metals on particles with different sizes from municipal solid waste incineration[J].Journal of Hazardous Materials.2000. 79(3):229-239
[7] Luo X-S, Ding J, Xu B, et al.Incorporating bioaccessibility into human health risk assessments of heavy metals in urban park soils[J].Science of The Total Environment.2012. 424(0):88-96
Materials and methods Sample collection and digestion Total suspended particulates(TSP) (N=6×3) were collected in 2011 from the surrounding of the Nanshan MSWI in Shenzhen(Fig.1), a mega-city located in southeast China.
[5] Chang M B, Huang C K, Wu H T, et al.Characteristics of heavy metals on particles with different sizes from municipal solid waste incineration[J].Journal of Hazardous Materials.2000. 79(3):229-239
[7] Luo X-S, Ding J, Xu B, et al.Incorporating bioaccessibility into human health risk assessments of heavy metals in urban park soils[J].Science of The Total Environment.2012. 424(0):88-96
Online since: September 2011
Authors: Zhi Huang, Yun Huang, Ying Liu, Ya Jie Wang, Yue Zhang
Fig. 1 Grinding machine structure scheme
Fig. 2 Grinding machine 3D model
3.Principle of grinding machine structural static analysis and finite element modeling
3.1Principle of grinding machine structural static and dynamic analysis
The main components and the whole machine would generate certain deformation and stress inside the material by the various loads.
Through static analysis, each point’s data of the stress, strain, displacement and deformational energy could be calculated within machine, its basic point formula of static analysis is as follows[3]: (1) In Eq.s1, where is the element nodal force, is called the element stiffness matrix, is the stress vector at any point within the unit, is the elastic matrix related to unit material, t is the element thickness, A is the unit area
Solutions can be obtained through finite element calculation after defining material properties, meshing, exerting loads and boundary conditions[5], as shown in figure 3.
Huang, “The Development of Large High Efficient CNC Gantry Grinder for Vessel in Nuclear Power,” Key Engineering Materials vol. 416,pp. 421-425.July 2009
Gao, “Dynamic Finite Element Analysis of Heavy-duty Machine Tool,” Journal of Fuzhou University(Natural Science),Vol. 31 No. 1,pp. 69-72 Jan. 2003
Through static analysis, each point’s data of the stress, strain, displacement and deformational energy could be calculated within machine, its basic point formula of static analysis is as follows[3]: (1) In Eq.s1, where is the element nodal force, is called the element stiffness matrix, is the stress vector at any point within the unit, is the elastic matrix related to unit material, t is the element thickness, A is the unit area
Solutions can be obtained through finite element calculation after defining material properties, meshing, exerting loads and boundary conditions[5], as shown in figure 3.
Huang, “The Development of Large High Efficient CNC Gantry Grinder for Vessel in Nuclear Power,” Key Engineering Materials vol. 416,pp. 421-425.July 2009
Gao, “Dynamic Finite Element Analysis of Heavy-duty Machine Tool,” Journal of Fuzhou University(Natural Science),Vol. 31 No. 1,pp. 69-72 Jan. 2003
Online since: December 2012
Authors: Le Jin, Yan Xue, Shu Hua Wang, Hai Ou Jing
Observation and Analysis of the Microstructures of IGF Refined Low Carbon Microalloyed Non-tempered Steel
Shuhua Wang1, a, Haiou Jing2, b, Le Jin1, c and Yan Xue1, a
1School of Mechanical and Electronic Engineering,
Shandong Jianzhu University, Jinan 250101, China
2School of Materials Science and Engineering,
Shandong Jianzhu University, Jinan 250101, China
awangshuhua868@sina.com, bJinghaiou@sdjzu.edu.cn, cJinle@sdjzu.edu.cn
Keywords: Intragranular Ferrite (IGF), Low carbon microalloyed non-tempered steel
Abstract.
Shorter intervals and discontinuous cementite flakes help increase both strength and toughness of the material.
The cutting processing performance of the hot-forged non-tempered steel is a major element influencing the material’s application.
Liu: Journal of Mechanical Engineering Vol.16 (in Chinese) (2010), pp135-139 [2] Z.B.
Huang, etc: Materials Review Vol.18 (8) (in Chinese) (2004), pp50-52 [4] Y.Koyasu, H.Takada, T.Tnkshashi, etc: Setesu Kenk'yu, Vol. 337(1990), pp41-48 [5] S.L.
Shorter intervals and discontinuous cementite flakes help increase both strength and toughness of the material.
The cutting processing performance of the hot-forged non-tempered steel is a major element influencing the material’s application.
Liu: Journal of Mechanical Engineering Vol.16 (in Chinese) (2010), pp135-139 [2] Z.B.
Huang, etc: Materials Review Vol.18 (8) (in Chinese) (2004), pp50-52 [4] Y.Koyasu, H.Takada, T.Tnkshashi, etc: Setesu Kenk'yu, Vol. 337(1990), pp41-48 [5] S.L.
Online since: October 2010
Authors: Guerold Sergueevitch Bobrovinitchii, Marcello Filgueira, Sérgio Neves Monteiro, Rômulo Crespo Tardim, Ana Lúcia Diegues Skury
Introduction
A recent trend for the development of new high-efficiency polycrystalline diamond materials points towards the optimization of the sintering technology of diamond bits with double layers, also known as polycrystalline diamond cutters (PDC).
The present study aims to examine the possibility of sintering PDCs using a new method related to the simultaneous sintering of the two layers, having powders as starting materials.
:Science Vol. 208 (1980), p. 872. 2 D.G.
Mendonça: International Journal of Refractory Metals and Hard Materials Vol. 21 (3-4) (2003), p. 155. 7 A.L.
The present study aims to examine the possibility of sintering PDCs using a new method related to the simultaneous sintering of the two layers, having powders as starting materials.
:Science Vol. 208 (1980), p. 872. 2 D.G.
Mendonça: International Journal of Refractory Metals and Hard Materials Vol. 21 (3-4) (2003), p. 155. 7 A.L.
Online since: May 2014
Authors: Tsuyoshi Mayama, Hirohiko Takuda, Takayuki Hama
Because this procedure uses the deformation characteristics in strong-textured materials, this procedure cannot be employed to cast Mg alloys.
Therefore, in the present study the material parameters for the cast Mg alloy sheet were determined as follows.
Table 1 Identified material parameters.
Andar, T.Kuwabara, D.Steglich, Material modeling of AZ31 Mg sheet considering variation of r-values and asymmetry of the yield locus, Mater.
Ohori, Grain refinement of AZ31 magnesium alloy sheets fabricated by rolled and heat treated twin roll cast plate, Journal of Japan Institute of Light Metals, 58 (2008), pp.22-26.
Therefore, in the present study the material parameters for the cast Mg alloy sheet were determined as follows.
Table 1 Identified material parameters.
Andar, T.Kuwabara, D.Steglich, Material modeling of AZ31 Mg sheet considering variation of r-values and asymmetry of the yield locus, Mater.
Ohori, Grain refinement of AZ31 magnesium alloy sheets fabricated by rolled and heat treated twin roll cast plate, Journal of Japan Institute of Light Metals, 58 (2008), pp.22-26.
Online since: October 2014
Authors: Mohd Zulham Affandi bin Mohd Zahid, Md.Hadli bin Abu Hassan, Sumayah Abdulsalam Mustafa
Topology optimization is to seek the best loading path in the unlimited topology combinations by changing the amount and location of materials to save the most materials [2].
Select cross section and define material.
Perform Analysis after Creating STAAD File The main function of this step is to pass all required information of truss like geometry of truss, material properties, Support condition, and loading conditions for STAAD software to implement analysis.
Nazarpour, Optimal design of truss structures via an augmented genetic algorithm, Turkish Journal of Engineering and Environmental Sciences. 37 (1) (2013) 56-68
Select cross section and define material.
Perform Analysis after Creating STAAD File The main function of this step is to pass all required information of truss like geometry of truss, material properties, Support condition, and loading conditions for STAAD software to implement analysis.
Nazarpour, Optimal design of truss structures via an augmented genetic algorithm, Turkish Journal of Engineering and Environmental Sciences. 37 (1) (2013) 56-68
Online since: July 2010
Authors: Hirokazu Chazono, Takaaki Tsurumi, Takuya Hoshina, Osamu Sakurai, Hiroaki Takeda, Katsuya Taniguchi, Satoshi Yokomizo, Youichi Mizuno
The material properties used in the FEM showed in Table 1.
The permittivity and polarization-electric field (P-E) characteristics of dielectric layers in MLCCs were measured using 4294A impedance analyzer (Agilent Technology) and Precision LC material analyzer (Radiant Technologies), respectively.
Physical properties of materials used for FEM Dielectrics Ni Coefficient of thermal expansion [10-6/°C] 11 13.7 Elastic modulus [GPa] 108 200 Poisson's ratio 0.25 0.31 0.001 0.002 3.2 0.1 0.1 2.5 0.35 0.35 0.6 1.6 1 2 3 unit : mm Fig. 1.
Paik, Journal of Materials Science, 15, 253 (2004) [5] Jong-Sung Park, S.
The permittivity and polarization-electric field (P-E) characteristics of dielectric layers in MLCCs were measured using 4294A impedance analyzer (Agilent Technology) and Precision LC material analyzer (Radiant Technologies), respectively.
Physical properties of materials used for FEM Dielectrics Ni Coefficient of thermal expansion [10-6/°C] 11 13.7 Elastic modulus [GPa] 108 200 Poisson's ratio 0.25 0.31 0.001 0.002 3.2 0.1 0.1 2.5 0.35 0.35 0.6 1.6 1 2 3 unit : mm Fig. 1.
Paik, Journal of Materials Science, 15, 253 (2004) [5] Jong-Sung Park, S.
Online since: December 2013
Authors: Chang Bin Hu, Mu Lu Du, Li Juan Wang
Field tests
Materials and Methods.
In addition, the initial temperature of the raw material was supposed to be the average air temperature in a day.
Table 7 Main environmental parameters The first day after paved Initial temperature of the raw material [℃] 21 Pouring time 7:00 Highest air temperature [℃] 38 Lowest air temperature [℃] 28 Wind speed [m/s] 1 Solar radiation peak [W/m2] 1000 The second day after paved Initial temperature of the raw material [℃] 28 Pouring time 18 Highest air temperature [℃] 1 Lowest air temperature [℃] 500 Fig.6 Zero-stress temperature gradient in different age of concrete According to Fig.6, zero-stress temperature gradient shows prominently developing process compared with built-in temperature of slab at different ages by the effect of creep.
Acknowledgements The authors wish to acknowledge the financial support for this project (Effects of early-age built-in curling on mechanical behaviors of Jointed Plain Concrete Pavement (JPCP) under heavy- load vehicles, No.50908056) from National Natural Science Foundation of China.
Roesler, Characterizing effective built-in curling from concrete pavement field measurements, Journal of Transportation Engineering, ASCE. 131 (2005) 320-327
In addition, the initial temperature of the raw material was supposed to be the average air temperature in a day.
Table 7 Main environmental parameters The first day after paved Initial temperature of the raw material [℃] 21 Pouring time 7:00 Highest air temperature [℃] 38 Lowest air temperature [℃] 28 Wind speed [m/s] 1 Solar radiation peak [W/m2] 1000 The second day after paved Initial temperature of the raw material [℃] 28 Pouring time 18 Highest air temperature [℃] 1 Lowest air temperature [℃] 500 Fig.6 Zero-stress temperature gradient in different age of concrete According to Fig.6, zero-stress temperature gradient shows prominently developing process compared with built-in temperature of slab at different ages by the effect of creep.
Acknowledgements The authors wish to acknowledge the financial support for this project (Effects of early-age built-in curling on mechanical behaviors of Jointed Plain Concrete Pavement (JPCP) under heavy- load vehicles, No.50908056) from National Natural Science Foundation of China.
Roesler, Characterizing effective built-in curling from concrete pavement field measurements, Journal of Transportation Engineering, ASCE. 131 (2005) 320-327
Online since: July 2014
Authors: Rizalman Mamat, Ahmad Fitri Yusof, W.N. Azeem, Amir Bin Aziz
Materials and Method
The emulsified fuel was produced using a mechanical stirrer machine which is commonly used in the industry for emulsion preparation [9].
[3] Maria, J.R., Abraham, C., Lourdes, R., Rubi, R., Angel, P., Transesterification of sunflower oil over zeolites using different metal loading: a case of leaching and agglomeration studies, Journal of Applied Catalysis A General. 346 (2008) 79–85
Adam Abdullah, Effect of Water Content and Tween 80 to the Stability of Emulsified Biodiesel, Applied Mechanics and Materials. 465-466 (2014) 191-195
[11] Ahmad Fitri Yusop, R.M., Mat Yasin, Mohd Hafizil, Abdul Adam Abdullah, Amir Aziz, Comparative Study of Particulate Matter (PM) Emissions in Diesel Engine Using Diesel-Methanol Blends, Applied Mechanics and Materials. 465 (2014) 1255-1261
[19] Kannan, T.K., et a, Thevetia peruviana biodiesel emulsion used as a fuel in a single cylinder diesel engine reduces NO and smoke, Thermal science. 15 (2011) 1185-1191.
[3] Maria, J.R., Abraham, C., Lourdes, R., Rubi, R., Angel, P., Transesterification of sunflower oil over zeolites using different metal loading: a case of leaching and agglomeration studies, Journal of Applied Catalysis A General. 346 (2008) 79–85
Adam Abdullah, Effect of Water Content and Tween 80 to the Stability of Emulsified Biodiesel, Applied Mechanics and Materials. 465-466 (2014) 191-195
[11] Ahmad Fitri Yusop, R.M., Mat Yasin, Mohd Hafizil, Abdul Adam Abdullah, Amir Aziz, Comparative Study of Particulate Matter (PM) Emissions in Diesel Engine Using Diesel-Methanol Blends, Applied Mechanics and Materials. 465 (2014) 1255-1261
[19] Kannan, T.K., et a, Thevetia peruviana biodiesel emulsion used as a fuel in a single cylinder diesel engine reduces NO and smoke, Thermal science. 15 (2011) 1185-1191.