Search results

The geometry model, material model and heat conduction model are built.
The material is 7075-T7451 alumium alloy, and the processing methods is cut off.
Tabel 1 Material parameters of Johnson-Cook model for 7075-T7451 alluminum alloy material A(Mpa) B(Mpa) n c m 7075-T7451 436 535 0.5 0.019 0.97 Table 2 Parameters of tool materials Elastic modulus (Mpa) Poisson ratio Thermal expansion coefficient(m/m.oC) Specific heat (J/kg. oC) Thermal conductivity (W/m.k) 8E+11 0.22 4.7E-6 200 4.6E1 The friction between chip and tool has great inprotant influence on the cutting force and cutting heat.
Acknowledgement This work is supported by China National Science Foundation (No.51075298) and Tianjin University & Education Foundation ( YJS10-01).
Cheng: Journal of Zhejiang University (Engineering Science), Vol.40 (2006) No.5, pp.759-761.

Introduction Nowadays, magnetic amorpho-nanocrystalline materials find wide practical application.
One of the popular methods for creating such materials is the method of directional crystallization from an amorphous state.
Therefore, the issue of studying kinetics of amorphous materials properties during annealing is actual [1].
/Central European Journal of Physics 2(1) 2004 104-119
Crystallization Kinetics of Amorphous Materials.

Effect of Reserved Texture on Mechanical Properties of Cold Drawn Pearlitic Steel Wire Lichu Zhou, Yufei Zhao, Feng Fang* School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China *Fangfeng@seu.edu.cn Keywords：pearlitic wire, texture, cold drawn Abstract: In this paper, pearlitic steel wire with/without reserved texture were investigated with the help of mechanical test system, scanning electron microscope (SEM) and XRD.
Deformation of this two phase are more closely to composite materials of laminate structure. α-fe(soft phase) deform more than cementite(hard phase) when deformation was not heavily.
Acknowledgment The authors would like to thank Prof.Fan Li in the Jiangsu Key Lab for Advanced Metallic Materials,Southeast University and Dr.
This work was supported by Natural Science Foundation of China (grant no. 51371050), Natural Science Foundation of Jiangsu Province, China (grant no.
Journal of Materials Science and Technology. 21( 2005) 357-360 [12] Y.

But it is difficult to describe the constitutive relation of rock veritably by an analytical model, especially for the creep deformation case, because of the complexity of rock material.
The test was carried out in the State Key Laboratory of Mine Disaster Prevention and Control in Shandong university of Science and Technology, China.
Acknowledgment The authors would like to thank the financial supports from China Natural Science Fund (No. 51074099, No.51004068), the National Basic Research Program of China (973 Program) Grant No. 2010CB226805, Natural Science Fund of Shandong Province (No.
Wang: Chinese Journal of Geotechnical Engineering Vol. 23 (2001), p. 14
Wang: Chinese Journal of Rock Mechanics and Engineering Vol,14 (1995), p.139

Plant Material Astragalus was provided by Natural Medicine laboratory of Lanzhou University of Technology.
Wu, Advances in studies on chemical constituents and pharmacological activities of Astragalus, Chinese Journal of Convalescent Medicine [in Chinese]. 20 (2011) 435-436
Li, Immunoregulation Effect of Astragalus Polysaccharides, Food Science [in Chinese]. 28 (2013) 17
Tan, Advance in study on Astragalus Polysaccharide, Journal of North Sichuan Medical College [in Chinese]. 28 (2013) 17
Nielsen, Food Analysis Laboratory Manual, Food Science Texts Series, Springer Science and Business Media, New York, LLC, London, 2010.

Experimental Investigation of Porous Micro Heat Sink for electronics cooling Application Kalin Su1, a, Jing Liu2,b, Jun Rong2,c, Junhua Wan2,d 1Department of Physics, Hunan Institute of Science and Technology, Yueyang, 414000, China 2 School of Information and Communication Engineering, Hunan Institute of Science and Technology, Yueyang, 414000, China ahustheat@163.com; bzhongminwan@ sohu.com; clinkasu@tom.com; djunhuawan@sohu.com Keywords: heat sink; porous media; heat transfer; high heat fluxes; experimental investigation Abstract.
The heater is covered by insulation material, and the heat loss is from the source is minimized.
Selladurai: nternational Journal of Thermal Sciences, Vol.49 (2010), p. 1238
Thom: Experimental Thermal and Fluid Science, Vol.34 (2010), p.81
Choi: International Journal of Heat and Mass Transfer, Vol.53 (2010), p.2159

The Seismic Behavior of Strengthened Joints Between Concrete-filled Steel Tubes and Beams Based on the Numerical Simulation Technology Yun-peng Chu, Yong Yao, Shu-lian Xiao, Yue Chen School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China Email: chuyunpeng@swust.edu.cn , yy001221@163.com , 349779228@qq.com 471469647@qq.com Keywords: Frame joint; Nonlinear FEM analysis; Ductility; Seismic behavior Abstract, As a key part in concrete-filled steel tubular frames, the seismic behavior of joints between concrete-filled steel tubes and beams needs more research because of the complexity of stress under the reciprocating load. the behavior of 9 strengthened joints connecting concrete-filled steel tube with H-shaped steel beam have been analyzed under reversed cyclic loading condition by using finite element analysis software ANSYS, and the result show that: (1) The ultimate bearing capacity, energy dissipation capacity
Filled concrete effectively improve the local stability and fire resistance capability of steel tube, and the internal restraints of concrete filled steel pipe has increased the strength, ductility and toughness properties of concrete significantly, give full play to the strengths and potential of the two materials, by using of this interaction of the two materials produced during loading process, can reduce the pipe cross-section of components of this concrete filled steel tubular structure, improve load capacity significantly, save the cost of steel and infrastructure, reducing structural cost and save a lot of support construction template work, can reduce 1/4-1/3 period, which causing industry wide attention [2-4].
Take steel Q235-B, the yield strength 215MPa, tensile strength 320Mpa; assuming ideal elastic-plastic material model, using Von-Mises yield rule and bilinear kinematic hardening constitutive relation, elastic modulus E = 2.1 × 105N/mm2, Poisson's ratio 0.3; Concrete grade C40, modulus of elasticity E = 3.25×104N/mm2, Poisson's ratio 0.173, using the William-warnke five-parameter failure rule.
Journal of Building Structures,2008，38（7）：10-14.
Journal of Southwest University of Science and Technology.2009, 24(1):7-13.

In engineering, the change of cushion’s modulus was controlled by its material’s gradation.
When the material particle was oversized, there was no mobility of cushion and it was hardly to contact with the particle of soil, when the material particle was undersized, the mobility of cushion was increased, in which the bearing performance of pile was hindered, particularly for the soft soil foundation.
Wuhan University of Science and Technology, Wuhan 2003
CHINA CIVRL ENGINEERING JOURNAL, Vol.37(2004), p.78 [4] Xie Tao, Yuan Wenzhong, Zhu Ming.
JOURNAL OF HIGHWAY AND TRANSPORTATION RESEARCH AND DEVELOPMENT, Vol.20-5(2003), p. 61 [6] CHEN Zhi-jian, ZHANG Xiong-wen, LIU Yi, etc..

Correspondingly, the byproduct glycerol of the first reactor is removed from the product with help of the immiscible liquid–liquid separation and residues go on the second transesterifi-cation called two-step reaction process, which can be further conversion of raw materials.
The biodiesel phase, containing biodiesel, unreacted methanol and raw material oil, enters the second reactor to react with additional catalyst NaOH.
(2) Separating materials continuously between two CSTR, taking into account the effect of temperature on the separation, takes separation temperature is around about 323 K and reaction pressure is set to 1 atm
Yu, “Design and control of biodiesel production processes with phase split and recycle in the reactor system,” Journal of the Taiwan Institute of Chemical Engineers, vol. 42, 2011, pp. 741–750
Zhu, “Kinetics of transesterification of soybean oil,” Journal of American Oil Chemical Society, vol.74, 1997, pp. 1457-1463

It can mill high hardness (42 HRC-65 HRC) metal materials directly.
(5) The material of ballscrew is uniform and isotropic, and the thermal conductivity is constant.
Acknowledgments The authors acknowledge the financial support of national natural science foundation of China (Project # 51075246), "High-end CNC machine tools and basic manufacturing equipment," National Science and Technology major projects (2012ZX04002013), Shandong Province Education Department Plan (J09LD12).
Chen: Journal of Hua Zhong University of Technology, Vol. 19 (1991) No.8,p.75.
Song and C.R Zhang: Journal of Shandong University of Technology, Vol. 30 (2000) No.2,p.160.