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Online since: January 2016
Authors: Cristian Copiluși, Viorica Velișcu
But these test beds needs time settings and also materials for assuring the experimental simulations on real weather conditions.
After importing this mechanism, the components material properties were inserted according with specialty literature data in order to identify the inertia momentums and components mass centers [12, 13].
Izelu, Analysis of Rocker Mechanism for Automobile Windscreen Wiper Applications, Journal of Innovative Research in Engineering and Science, 1(1) (2010) 13-54
Mechanisms and Machine Science, 18.
Rajasekaran, Numerical methods in Science and Engineering: A Practical Approach, S.
After importing this mechanism, the components material properties were inserted according with specialty literature data in order to identify the inertia momentums and components mass centers [12, 13].
Izelu, Analysis of Rocker Mechanism for Automobile Windscreen Wiper Applications, Journal of Innovative Research in Engineering and Science, 1(1) (2010) 13-54
Mechanisms and Machine Science, 18.
Rajasekaran, Numerical methods in Science and Engineering: A Practical Approach, S.
Online since: May 2011
Authors: Ting Ding, Qi Wen Li, Sheng Guo Ding
According to material mechanics, for rectangular section of cross-section is
(1)
Practical calculation show calculated wrest resistant stiffness by the formula (1) too large, Straight solid rod’s wrest resistant stiffness is recommended the formula derived from the elastic mechanics : (2)
Coefficient related to cross section h/b, as Table below
1.5
2
2.5
3
4
10
>10
elastic theory
0.196
0.229
0.249
0.263
0.281
0.312
0.333
the mechanics materials
0.271
0.417
0.604
0.833
1.417
8.417
>8.5
From the table shows, value of according to the material mechanics calculation increase significantly with beam height-width ratio h/b increased unreasonably, But according to our experience[1] for the calculation to wrest resistant stiffness , formula(2) derived from the elastic theory is more advisable for wrest resistant stiffness .In some structural finite element analysis software, in order
Pull axial force in the beam caused by Anti-symmetry load is greater than depression axis force caused by positive symmetrical load (fig 5c) .In the above mentioned various cases, tensile axial force existing in bottom frame beam should be paid attention in structural design Acknowledgements The projects (the approval number: 50868002) funded by National Natural Science Foundation of China References: [1] Shengguo Ding Guizhou science and technology (2010), in press (In Chinese) [2] Shengguo Ding Tao Zheng etc Concrete Structure. ( 2003) P63 In Chinese [3] Shengguo Ding Fang Hao Ting Ding Builing Science(2003) P4 In Chinese [4] Shengguo Ding Building Structure (1999)P46 (In Chinese) [5] Shengguo Ding Qiwen Li Analysis of structure form of whole frame for adding floors Building Structure (1995) P44 (In Chinese) [6] Shengguo Ding Ting Ding Tao Zheng etc Journal Of Guizhou university of technology (2003)P82 (In Chinese)
Pull axial force in the beam caused by Anti-symmetry load is greater than depression axis force caused by positive symmetrical load (fig 5c) .In the above mentioned various cases, tensile axial force existing in bottom frame beam should be paid attention in structural design Acknowledgements The projects (the approval number: 50868002) funded by National Natural Science Foundation of China References: [1] Shengguo Ding Guizhou science and technology (2010), in press (In Chinese) [2] Shengguo Ding Tao Zheng etc Concrete Structure. ( 2003) P63 In Chinese [3] Shengguo Ding Fang Hao Ting Ding Builing Science(2003) P4 In Chinese [4] Shengguo Ding Building Structure (1999)P46 (In Chinese) [5] Shengguo Ding Qiwen Li Analysis of structure form of whole frame for adding floors Building Structure (1995) P44 (In Chinese) [6] Shengguo Ding Ting Ding Tao Zheng etc Journal Of Guizhou university of technology (2003)P82 (In Chinese)
Online since: November 2014
Authors: Wan Aizan Wan Abdul Rahman, Zurina Mohamad, Nazuha Tugiman
The thermal properties and thermal stability of biocomposite foam was studied by using the thermogravimetric analysis (TGA) in a material as a function of temperature (or time) under a controlled atmosphere.
Fig. 1 - Weight loss versus temperature of PP/RS biocomposite foam at various filler loading measured by TGA The higher onset degradation temperatures indicate the improved thermal stability of the material and attributed to the lower lignin content in the raw material [7].
Master of Science.
Animal Feed Science and Technology. 130 (2006) 137–171
Peronema Forestry Science Journal. 1 (2005) 46-49.
Fig. 1 - Weight loss versus temperature of PP/RS biocomposite foam at various filler loading measured by TGA The higher onset degradation temperatures indicate the improved thermal stability of the material and attributed to the lower lignin content in the raw material [7].
Master of Science.
Animal Feed Science and Technology. 130 (2006) 137–171
Peronema Forestry Science Journal. 1 (2005) 46-49.
Online since: November 2012
Authors: Xiao Jun Wang, Yang Tao Xu, Tian Dong Xia, Wen Jun Zhao
Alloying element Nb effect on microstructure of Co-Al-W superalloy by vacuum arc melting
XU Yang Tao1,2, XIA Tian Dong1,2,ZHAO Wen Jun1,2,WANG Xiao Jun1,2
1 State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
2 Key Laboratory of Non-ferrous Metal Alloys, The Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
email:lanzhouxuyt@163.com
Key words: Co-Al-W alloy, vacuum arc melting, microstructure, hardness
Abstract: Co-Al-W supperalloy used pure element powder, according to the ratio of different atomic percentage composition to make ingredients.
Cobalt-base High-Temperature Alloys[J].Science,2006;312:90-93
Activation Energy of Oxidation of novel Co-Al-W Superalloys at High Temperatures[J].Rare Metal Materials and Engineering,2011,40(4):701-704
Journal of University of Science and Technology Beijing,2008, 30(12): 1369–1372
[12] Xu Yangtao, Xia Tiandong, Yan Jianqiang.Effect of several alloying elements on electrochemical corrosion behavior of a novel Co-Al-W superalloy[J].Corrosion Science and Protection Technology, 2010,22(5):372-376.
Cobalt-base High-Temperature Alloys[J].Science,2006;312:90-93
Activation Energy of Oxidation of novel Co-Al-W Superalloys at High Temperatures[J].Rare Metal Materials and Engineering,2011,40(4):701-704
Journal of University of Science and Technology Beijing,2008, 30(12): 1369–1372
[12] Xu Yangtao, Xia Tiandong, Yan Jianqiang.Effect of several alloying elements on electrochemical corrosion behavior of a novel Co-Al-W superalloy[J].Corrosion Science and Protection Technology, 2010,22(5):372-376.
Online since: July 2018
Preface
This volume of Diffusion Foundations is devoted to high-tech materials such as elemental and compound semiconductors (chapters 1 and 2) and high-entropy alloys (Chapters 3 and 4).
Mehrer The two volumes of Diffusion Foundations with the titles Diffusion in High-tech Materials and Diffusion and Thermal Transport in Bulk and Nano-materials are dedicated to the memory of Professor Dr.
The diffusion community has lost a person with great merits in diffusion science.
In his group, about 27 PhD and master students performed diffusion studies in various materials and finished their thesis.
Nico published 165 papers in peer-reviewed international journals and scientific articles in several books before he retired in 2015.
Mehrer The two volumes of Diffusion Foundations with the titles Diffusion in High-tech Materials and Diffusion and Thermal Transport in Bulk and Nano-materials are dedicated to the memory of Professor Dr.
The diffusion community has lost a person with great merits in diffusion science.
In his group, about 27 PhD and master students performed diffusion studies in various materials and finished their thesis.
Nico published 165 papers in peer-reviewed international journals and scientific articles in several books before he retired in 2015.
Online since: June 2008
Authors: J.M. Guilemany, Sergi Dosta, R. Caldeira, J.R. Miguel, Irene G. Cano
Ciència dels Materials i Enginyeria Metal.lúrgica.
It is well known that materials with nanostructures exhibit remarkable and technologically attractive properties.
In order to obtain nanostructured materials one way is to use nano-scaled powders and another is to obtain metastable structures [2,3] which transform to nanostructured material after heat treatment.
Mostaghimi, Thermal Spray 2003: Advancing the Science and Applying the Technology, B.R.
R., Kear B.H, Journal of American Ceramic Society, 2003
It is well known that materials with nanostructures exhibit remarkable and technologically attractive properties.
In order to obtain nanostructured materials one way is to use nano-scaled powders and another is to obtain metastable structures [2,3] which transform to nanostructured material after heat treatment.
Mostaghimi, Thermal Spray 2003: Advancing the Science and Applying the Technology, B.R.
R., Kear B.H, Journal of American Ceramic Society, 2003
Online since: February 2011
Authors: Shan Yao, Zhong Fei Jiao, Shu Ming Zhao, Feng Zeng, Di Wu
A Digital Near Net Shape Manufacturing Propeller with Complex Surface
Zhongfei Jiaoa, Shan Yaob ,Shuming Zhaoc ,Feng Zeng,Di Wu
School of materials science and Engineering，Dalian University of Technology, Ling gong Road, DaLian, China
a xx2000jzf@163.com, b yaoshan@dlut.edu.cn, cscorpion2.0@163.com
Keywords:.
When the power is large enough, the scanned coated sand will be invalidated and couldn’t be cured, which will form a dividing surface between the extraneous materials and the objective part.
After consolidation, the coated sand mold can be finally got by removing the extraneous materials out of the dividing surface.
The material used in PIRP is powder.
The accuracy and efficiency could be greatly improved, for the layer thinkness is adjustable according to the shape of part. 3) Various materials are available for PIRP.
When the power is large enough, the scanned coated sand will be invalidated and couldn’t be cured, which will form a dividing surface between the extraneous materials and the objective part.
After consolidation, the coated sand mold can be finally got by removing the extraneous materials out of the dividing surface.
The material used in PIRP is powder.
The accuracy and efficiency could be greatly improved, for the layer thinkness is adjustable according to the shape of part. 3) Various materials are available for PIRP.
Online since: November 2012
Authors: Hai Yan Song, Jian Sheng Zhou, Zong Min Liu
Due to the intrinsic coupling phenomenon, piezo-electric/piezo-magnetic materials are applied widely in science and technology field.
Let functional (13) Considering Eqs.(2) and (4), we obtain (14) Substituting constitutive equation (9) into Eq.(14), we have (15) According to Eq.(15), the first conservation equaton on magnetic enthalpy can be expressed as follow (16) The integral form of the conservation equaton on magnetic enthalpy is as follow (17) Because linear hypothesis is not used in the derivation above, Eqs. (16) and (17) are also suitable for nonlinear materials.
Similar to energy-momentum tensor defined by Eshelby, and considering Eqs. (16) and (17), energy-momentum tensor of piezo-magnetic material with magnetic enthalpy is defined as follow (18) Considering Eq.(15) and Eq.(18), can be expressed as follow (19) For linear materials, and considering constitutive equations and governing equations (2) and (4), can further be expressed as follow (20) Substituting Eq.(20) into Eq.(19), and considering Eq.(1) and Eq.(3), we obtain (21) When body force , the second conservation equaton on magnetic enthalpy can be derived from Eq.(21) (22) Substituting Eq.(18) into Eq.(22), we obtain (23) The integral form of the second conservation equaton on magnetic
[11] Song Hai-Yan, Zhou Zhen-Gong, Liang Li-Fu and Liu Zong-Min: Key Engineering Materials, 2010, Vols.419-420, pp:153-156
[12] Song Haiyan, Liang Lifu and Zhou Zhengong: Journal of Harbin Engineering University, 2011, 32(1), pp:33-37.
Let functional (13) Considering Eqs.(2) and (4), we obtain (14) Substituting constitutive equation (9) into Eq.(14), we have (15) According to Eq.(15), the first conservation equaton on magnetic enthalpy can be expressed as follow (16) The integral form of the conservation equaton on magnetic enthalpy is as follow (17) Because linear hypothesis is not used in the derivation above, Eqs. (16) and (17) are also suitable for nonlinear materials.
Similar to energy-momentum tensor defined by Eshelby, and considering Eqs. (16) and (17), energy-momentum tensor of piezo-magnetic material with magnetic enthalpy is defined as follow (18) Considering Eq.(15) and Eq.(18), can be expressed as follow (19) For linear materials, and considering constitutive equations and governing equations (2) and (4), can further be expressed as follow (20) Substituting Eq.(20) into Eq.(19), and considering Eq.(1) and Eq.(3), we obtain (21) When body force , the second conservation equaton on magnetic enthalpy can be derived from Eq.(21) (22) Substituting Eq.(18) into Eq.(22), we obtain (23) The integral form of the second conservation equaton on magnetic
[11] Song Hai-Yan, Zhou Zhen-Gong, Liang Li-Fu and Liu Zong-Min: Key Engineering Materials, 2010, Vols.419-420, pp:153-156
[12] Song Haiyan, Liang Lifu and Zhou Zhengong: Journal of Harbin Engineering University, 2011, 32(1), pp:33-37.
Online since: December 2013
Authors: Yong Ge, De Cheng Feng, Shu Hui Dong, Feng Ping Wang, Bao Sheng Zhang
Therefore, this paper focuses on the effect of IRH and dry shrinkage of mixed mineral additives LWC caused by the development of curing -age, and mineral additives on internal relative humidity (IRH) and dry shrinkage of light weight aggregate concrete (LWC).
2 Materials, Sample Preparation and Test Methods
Mixtures were prepared with a P·O 42.5 cement.
Acknowledgments: Project supported by the National Natural Science Foundation of China (Grant No.51308163).
Construction and Building Materials. 2008, 22(12):2393~2399
Materials and Structures. 2007, (40): 311~317 [3] DONG Shuhui, GE Yong, YUAN Jie, ZHANG Baosheng, XU Chao.
Journal of Wuhan University of Technology. 2006, (3): 134~137 [5] Dale P.
Acknowledgments: Project supported by the National Natural Science Foundation of China (Grant No.51308163).
Construction and Building Materials. 2008, 22(12):2393~2399
Materials and Structures. 2007, (40): 311~317 [3] DONG Shuhui, GE Yong, YUAN Jie, ZHANG Baosheng, XU Chao.
Journal of Wuhan University of Technology. 2006, (3): 134~137 [5] Dale P.
Online since: August 2013
Authors: Liang Yu Li, Jian Feng Yue, Fu Lin Yao
The unilateral suture manipulator system works in conjunction with six degrees of freedom industrial robot, Through real-time transformation of position and posture about industrial robot to realize the processing of complex shapes and three-dimensional preform of composite materials.
Additionally , according to experience value of traditional sewing equipment , the given distance at starting instant between the needle-tip and the seam material is 20mm[6], which can effectively puncture sewing material and form a good thread-loop.
Material Review, 2005,19(1):64-67
Journal of Textile Research, 2008，29(11):115-118
Technical Manuals of Sewing Equipment[M].NanJing:Jiangsu Science and Technology Press, 2009,8.
Additionally , according to experience value of traditional sewing equipment , the given distance at starting instant between the needle-tip and the seam material is 20mm[6], which can effectively puncture sewing material and form a good thread-loop.
Material Review, 2005,19(1):64-67
Journal of Textile Research, 2008，29(11):115-118
Technical Manuals of Sewing Equipment[M].NanJing:Jiangsu Science and Technology Press, 2009,8.