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Online since: June 2014
Authors: Ying Zhi, Xin Liu, Xianghua Liu, Guang Zheng Luo
The heat conduction equation:
(1)
Where: ρ-material density (kg/m3); Cp-specific heat (J/kg•℃); k-thermal conductivity (W/m•℃) and Q-internal heat generation due to the phase change.
Acknowledgements This work was financially supported by the National Science Foundation (51374069,51174249).
References [1]Alzetta F, Toschi F: Iron and Steel Vol. 40(2005), p. 80 [2] Guangzheng Luo, Xin Liu, Jinlong Fan and Xianghua Liu: Journal of Iron and Steel Research Vol. 26(2014), p.13 [3] Timmel K, Miao X, Wondrak T, Stefani F, Lucas D, Eckert S: Eur.
Acknowledgements This work was financially supported by the National Science Foundation (51374069,51174249).
References [1]Alzetta F, Toschi F: Iron and Steel Vol. 40(2005), p. 80 [2] Guangzheng Luo, Xin Liu, Jinlong Fan and Xianghua Liu: Journal of Iron and Steel Research Vol. 26(2014), p.13 [3] Timmel K, Miao X, Wondrak T, Stefani F, Lucas D, Eckert S: Eur.
Online since: February 2012
Authors: Yan Wu Liu
Level clarity are 420 line, pixel is 500 (horizontal) x 582 (vertical), light-sensing surface area is 4.9 mm x 3.7 mm, Optical lens of view is 52 DHS x 44 DHS, aperture F = 2.0, focal length of the lens is 360 mm, lens material is the quartz glass.
Acknowledgment This work was financially supported by the Shandong Natural Science Foundation (ZR2011FQ039) References [1] Y.
Lu, “Study on mechanism of laser damage in photoelectric,” Laser Journal, vol. 22, pp. 5-8, Dec. 2001
Acknowledgment This work was financially supported by the Shandong Natural Science Foundation (ZR2011FQ039) References [1] Y.
Lu, “Study on mechanism of laser damage in photoelectric,” Laser Journal, vol. 22, pp. 5-8, Dec. 2001
Online since: September 2014
Authors: Yan Hua Ren, Ji Liang Fan, Yong Hong Wu, Xiu Feng Liu, Shi Chong Zhou
The steady and unsteady seepage of the saturated and unsaturated soil is mainly based on the Van Genuchten material model [1].
M.Th.(1980),A closed form equation for predicting the hydraulic function of unsaturated soils,Journal Soil Science Society of America, 44
M.Th.(1980),A closed form equation for predicting the hydraulic function of unsaturated soils,Journal Soil Science Society of America, 44
Online since: September 2013
Authors: R.C. Ilambirai, Rajesh Boga
When the p-type and n-type semiconductors are sandwiched together, the excess electrons in the n-type material flow towards the p-type and the holes are thereby vacated.
[11] P.Preethi and R.Mahalakshmi “Implementation of zero current switching in step up/step down resonant converter”, “International journal of engineering science and technology(IJEST)”Vol.3,No.2,Feb 2011
[11] P.Preethi and R.Mahalakshmi “Implementation of zero current switching in step up/step down resonant converter”, “International journal of engineering science and technology(IJEST)”Vol.3,No.2,Feb 2011
Online since: November 2012
Authors: Donato Cancellara, Fabio de Angelis
References
[1] Eringen, A.C., A unified theory of thermomechanical materials, Int.
Journal for Multiscale Computational Engineering, Vol. 5 No. 2 (2007), pp. 105-116
De Angelis, Multifield potentials and derivation of extremum principles in rate plasticity, Materials Science Forum, Vol. 539-543 (2007), pp. 2625-2630
De Angelis, Evolutive laws and constitutive relations in nonlocal viscoplasticity, Applied Mechanics and Materials, Vol. 152-154 (2012), pp. 990-996
Cancellara, Implications due to different loading programs in inelastic materials, Advanced Materials Research, Vol. 422 (2012), 726-733.
Journal for Multiscale Computational Engineering, Vol. 5 No. 2 (2007), pp. 105-116
De Angelis, Multifield potentials and derivation of extremum principles in rate plasticity, Materials Science Forum, Vol. 539-543 (2007), pp. 2625-2630
De Angelis, Evolutive laws and constitutive relations in nonlocal viscoplasticity, Applied Mechanics and Materials, Vol. 152-154 (2012), pp. 990-996
Cancellara, Implications due to different loading programs in inelastic materials, Advanced Materials Research, Vol. 422 (2012), 726-733.
Online since: February 2011
Authors: Liang Chu, Da Sen Bi, Jian Zhang
Numerical Simulation of High Inner-Pressure Hydroforming of T-Branch Tube
Liang Chu1,2,a, Jian Zhang1,2,b and Dasen Bi1,3,c
1School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
2Key Laboratory of Display Materials & Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, China
3Tianjin Key Lab for Photoelectric Materials & Devices, Tianjin 300384, China
achuliangszhm@163.com, bzhang_jian_99999@126.com,ctjbds@sina.com
Keywords:T-Branch Tube; High Inner-Pressure Hydroforming; Technological Parameter; Wall Thickness
Abstract.
It affects the flowing of material of expanding section and leads to the decrease of wall thickness.
For the large value of radius of round angles, the flow resistance of material is small and flow deformation occurred easily.
Acknowledgements This work was supported by Ministry of Industry and Information Technology of the People’s Republic of China support project under Grant No. 2009ZX04014-063-03 and 2010ZX04004-121, and Tianjin Key Subject for Materials Physics and Chemistry.
References [1] Shijian Yuan, Xiaosong Wang: Journal of Plasticity Engineering,Vol.15,No.2(2008), p.22-30 In Chinese [2] Shijian Yuan: Forging & Stamping Technology Vol.29, No.3(2004), p.1-6 In Chinese [3] Lihui Lang, Shijian Yuan, Zhongren Wang,Xiaosong Wang,et al: China Mechanical Engineering Vol.15, No.3(2004), p.268-272 In Chinese [4] Hongbao Zhou, Dexiu Mo: Die & Mould Manufacture No.3(2008), p.1-3 In Chinese
It affects the flowing of material of expanding section and leads to the decrease of wall thickness.
For the large value of radius of round angles, the flow resistance of material is small and flow deformation occurred easily.
Acknowledgements This work was supported by Ministry of Industry and Information Technology of the People’s Republic of China support project under Grant No. 2009ZX04014-063-03 and 2010ZX04004-121, and Tianjin Key Subject for Materials Physics and Chemistry.
References [1] Shijian Yuan, Xiaosong Wang: Journal of Plasticity Engineering,Vol.15,No.2(2008), p.22-30 In Chinese [2] Shijian Yuan: Forging & Stamping Technology Vol.29, No.3(2004), p.1-6 In Chinese [3] Lihui Lang, Shijian Yuan, Zhongren Wang,Xiaosong Wang,et al: China Mechanical Engineering Vol.15, No.3(2004), p.268-272 In Chinese [4] Hongbao Zhou, Dexiu Mo: Die & Mould Manufacture No.3(2008), p.1-3 In Chinese
Online since: November 2013
Authors: Mukharbiy Banov, Andrey Shanyavskiy
Damage accumulation in materials before fracture surface creation has not the same acceleration that after crack occurring.
Within the material volumes ahead of a crack tip near specimen faces (macroscopic scale level of plastic deformation), and throughout crosspieces regions along the crack front (mesoscopic scale level) material’s compressive Yield stress exceeds.
References [1] Ivanova V.S.: Synergetics: Strength and Fracture of Metallic Materials.
Science Publ., 1998
[6] Shanyavskiy A.A., Burchenkova L.M.: Int Journal of Fatigue Vol. 50, (2013), p.47 [7] Shanyavskiy A.A., Banov M.: in: Proc.
Within the material volumes ahead of a crack tip near specimen faces (macroscopic scale level of plastic deformation), and throughout crosspieces regions along the crack front (mesoscopic scale level) material’s compressive Yield stress exceeds.
References [1] Ivanova V.S.: Synergetics: Strength and Fracture of Metallic Materials.
Science Publ., 1998
[6] Shanyavskiy A.A., Burchenkova L.M.: Int Journal of Fatigue Vol. 50, (2013), p.47 [7] Shanyavskiy A.A., Banov M.: in: Proc.
Online since: September 2008
Authors: Ren Ke Kang, Zhu Ji Jin, Ze Wei Yuan, B.X. Dong
However, the relatively soft materials such as stainless steel, cast iron and
nickel alloy widely used for polishing CVD diamond film are easy to wear and adhere to diamond
film surface, which may further lead to low efficiency and poor polishing quality.
All materials used in this work were powders 99.9% in purity and -150µm in size.
The materials for grinding wheel fabricated by the combination of mechanical alloy and hot-press sintering (MA-HPS) may have high hardness.
Comparing two kinds of grinding wheels with SUS304, it is evident that two kinds of grinding wheels' materials have better high-temperature oxidation resistance than SUS304.
Acknowledgements The financial support for this research by the National Natural Science Foundation of China under grant No. 50575034 is greatly appreciated.
All materials used in this work were powders 99.9% in purity and -150µm in size.
The materials for grinding wheel fabricated by the combination of mechanical alloy and hot-press sintering (MA-HPS) may have high hardness.
Comparing two kinds of grinding wheels with SUS304, it is evident that two kinds of grinding wheels' materials have better high-temperature oxidation resistance than SUS304.
Acknowledgements The financial support for this research by the National Natural Science Foundation of China under grant No. 50575034 is greatly appreciated.