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Online since: April 2015
Authors: Jia Yan, Chen Lei Xiong, Chen Jing Qin, Xiu Li
The SP dispersion relation at a metal–semiconductor interface is determined by the dielectric functions of both materials[11,12].
Acknowledgements This work is supported by Beijing Municipal Commission of Education (06170114009/010), General program of science andtechnology development project of Beijing Municipal Commission (KM201510015004), Beijing Municipal Commission of Education Fundation for School Innovation Ability Promotion Plan (TJSHG201310015016) and the Creative Groups of Materi-als and Technology of Printed Electronics (23190113100).
Morkoc, A comprehensive review of ZnO materials and devices, Journal of Applied Physics 98(2005)
Acknowledgements This work is supported by Beijing Municipal Commission of Education (06170114009/010), General program of science andtechnology development project of Beijing Municipal Commission (KM201510015004), Beijing Municipal Commission of Education Fundation for School Innovation Ability Promotion Plan (TJSHG201310015016) and the Creative Groups of Materi-als and Technology of Printed Electronics (23190113100).
Morkoc, A comprehensive review of ZnO materials and devices, Journal of Applied Physics 98(2005)
Online since: January 2013
Authors: Hong Ying Yang, Jin Li Zhou, Ge Zhang
Introduction
Computer color matching technology has a lot of advantages, the most important is that it can help to save a large amount of time, manpower, materials, and financial resource by speeding up the color matching process and utilize the residual dyes [1, 2].
Experimental Materials and Instruments.
Acknowledgements This work was financially supported by Henan Province Youth Backbone Teachers Foundation and Henan Province Education Department Natural Science Research Grants Program.
PAN: Textile Research Journal, Vol. 80 (2010), No. 3, p. 263-270 [4] H.
Experimental Materials and Instruments.
Acknowledgements This work was financially supported by Henan Province Youth Backbone Teachers Foundation and Henan Province Education Department Natural Science Research Grants Program.
PAN: Textile Research Journal, Vol. 80 (2010), No. 3, p. 263-270 [4] H.
Online since: August 2013
Authors: Wen Lei, Yu Jin, Xue Jing Liu, Ming Yan Wang, Lu Jing, Cai Hong Li, Wang Wang Yu
Study on alfalfa protein-based adhesive modified by sodium hydroxide
Wangwang YU1,a, Yu JIN2,b, Xuejing LIU2,c, Mingyan WANG2,d,
Caihong LI1,e,Wen LEI*2,f,Lu JING2,g
1School of Mechanical Engineering, Nanjing Institute of Industry Technology, Nanjing 210023, China
2College of Science, Nanjing Forestry University, Nanjing 210037, China
ayuww@niit.edu.cn, b798911865@qq.com, c18061757962@163.com, dnjfu-polymer@163.com, elich@niit.edu.cn, fleiwen67@163.com, g470172416@qq.com
Keywords: alfalfa protein, adhesive, sodium hydroxide, bonding strength
Abstract.
Alfalfa is the most important raw material plant to extract leaves protein. 2750-3805Kg protein can be extracted from a hectare of alfalfa’s stems and leaves, which is 1.8 times than that of soybean.
Experimental Materials Alfalfa protein, self made in the lab, Sodium hydroxide, AR, Nanjing Chemical Reagent company.
It may be caused by the impurity of alfalfa protein or the existence of a melting range of the protein as one kind of polymer material.
[4] Zhong Z K, Sun X S, Fang X H, et al:Journal of the American Oil Chemists′ Society Vol. 78-1(2001), p. 37-41.In Chinese
Alfalfa is the most important raw material plant to extract leaves protein. 2750-3805Kg protein can be extracted from a hectare of alfalfa’s stems and leaves, which is 1.8 times than that of soybean.
Experimental Materials Alfalfa protein, self made in the lab, Sodium hydroxide, AR, Nanjing Chemical Reagent company.
It may be caused by the impurity of alfalfa protein or the existence of a melting range of the protein as one kind of polymer material.
[4] Zhong Z K, Sun X S, Fang X H, et al:Journal of the American Oil Chemists′ Society Vol. 78-1(2001), p. 37-41.In Chinese
Online since: October 2013
Authors: Long Bang Qing, Jun Feng Guan, Wei Feng Bai, Juan Wang, Peng Lin
Acknowledgements
This study was financially supported by the National Natural Science Foundation of China for Youth (51209094, 51009020), the State Key Laboratory of Coastal and Offshore Engineering Foundation of China (LP1211) and the High-level Personnel Research Project of North China University of Water Resources and Electric Power (201064).
Hu, submitted to Applied Mechanics and Materials, 2013
Zhao, Chinese Journal of Computational Mechanics, 30 (2013) 143-148, 155
Zhou, Construction and Building Materials, 38 (2013) 879-889.
Hu, submitted to Applied Mechanics and Materials, 2013
Zhao, Chinese Journal of Computational Mechanics, 30 (2013) 143-148, 155
Zhou, Construction and Building Materials, 38 (2013) 879-889.
Online since: December 2013
Authors: Wei Fang Zhang, Qing Yun Tang
Qualitative Calculation of Fatigue Life for Turbine Rotor Blade
Weifang Zhang 1,2, a, Qingyun Tang 1,b
1 Science & Technology Laboratory on Reliability & Environmental Engineering, Beihang University, Beijing 100191, China
2AVIC Beijing Institute of Aeronautical Materials, Beijing 100095, China
a08590@buaa.edu.cn, btangqingyunene@163.com
Keywords: fatigue fracture, qualitative calculation, Paris-formula, fatigue life, rotor blade
Abstract.
Based on experiments, Paris and Erdogan proposed a formula concerning fatigue crack propagation, which is well known as Paris-formula (1) where a is length of crack, c, m material related constants, and variance in amplitude of stress intensity factor; .
References [1] Lin J.W., Zhang J.H., and Yang S.: Chinese Journal of Aeronautics, Vol. 26, No. 3 (2013), pp.631-637
[5] Zhang W.F., Tao C.H., Xi N.S., Gao W., and Liu G.Y.: Material Engineering, No. 1 (2003), pp. 38-41.
Based on experiments, Paris and Erdogan proposed a formula concerning fatigue crack propagation, which is well known as Paris-formula (1) where a is length of crack, c, m material related constants, and variance in amplitude of stress intensity factor; .
References [1] Lin J.W., Zhang J.H., and Yang S.: Chinese Journal of Aeronautics, Vol. 26, No. 3 (2013), pp.631-637
[5] Zhang W.F., Tao C.H., Xi N.S., Gao W., and Liu G.Y.: Material Engineering, No. 1 (2003), pp. 38-41.
Online since: September 2013
Authors: Cheng Fan
Numerical Modeling of Fracture Process using Element-free Method
Cheng FAN
Center for Material Failure Modeling Research, Dalian University, Dalian 116622, China
fancheng@dlu.edu.cn
Keywords: Element-free Method, Manifold Method, Kriging Interpolation, Finite Cover
Abstract.
Introduction The actual deformation and failure process of geo-materials and geo-structures is a rather complex progressive evolution involving initial elastic deformation, crack propagation, large-scale displacement and even movement of a discrete system.
The material parameters involved: E=30MPa, v=0.3 and =1Mpa.
Acknowledgement The supports provided by National Natural Science Foundation of China (Grant No. 51104026 and 41172265) is highly acknowledged.
Chinese Journal of Rock Mechanics and Engineering, 12(2005), p 2065
Introduction The actual deformation and failure process of geo-materials and geo-structures is a rather complex progressive evolution involving initial elastic deformation, crack propagation, large-scale displacement and even movement of a discrete system.
The material parameters involved: E=30MPa, v=0.3 and =1Mpa.
Acknowledgement The supports provided by National Natural Science Foundation of China (Grant No. 51104026 and 41172265) is highly acknowledged.
Chinese Journal of Rock Mechanics and Engineering, 12(2005), p 2065
Online since: September 2013
Authors: Chuan Shan Zhao, Wen Jia Han, Hui Rong Yang, Xue Zhang
The Effects of Initiating Systems on CPAM Relative Molecular Weight and Strength Properties of Paperboard
Huirong Yang1,a,Chuanshan Zhao1,b, Xue Zhang1,c, Wenjia Han1,d
1Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education,
QiLu University of Technology, Jinan, Shandong Province,250353, China.
Experimental Materials.
Macromolecular Materials and Engineering, 2010, 295(3): 269-275
Journal of Polymers and the Environment, 2012, 21(2): 359-65.
Experimental Materials.
Macromolecular Materials and Engineering, 2010, 295(3): 269-275
Journal of Polymers and the Environment, 2012, 21(2): 359-65.
Online since: October 2013
Authors: He Zhu
Research of the stability of stiffened composite panel
He Zhu1, a
1School of Aeronautic Science and Engineering , Beihang University
No.37 Xueyuan Road , Beijing , China
azh.miracle@hotmail.com
Keywords: composite , stiffened panel , stability , buckle , stringer
Abstract.
Chiara Bisagni simulated stiffened panel's buckling and post-buckling behavior under average compression loads.In the model,stringers are simulated as torsion bars.Simply and fixed supported stiffened panel's buckling load is derived according to minimum potential energy principle.The error between results calculated and FEM is less than 12%[1].Nian-Zhong Chen has been evaluated the stiffened panel's reliability under compression loads with finite difference method and applied stiffness reduction method in the failure process of stiffened panels under compression loads[2].Mei-Wen Guo used the relative degree of freedom shell and beam elements discrete composite stiffened panels and stringers,established bidirectional stiffened panel finite element model,calculated their buckling behavior under average compression loads and discussed the influence on buckling load values by stringer height ,thickness and material ply[3].Xu Liangliang numerically simulated the buckling and post-buckling behavior
The material properties of single model layer are shown in Table 1.
Fig.1 Flute type stiffened panel finite element model Table1 Single ply material properties E1/MPa E2/MPa μ12 G12/MPa G13/MPa G23/MPa 127500 9000 0.28 4900 4900 3600 The geometry parameters of composite stiffened plate is: skin length L=590mm, width W=440mm,skin plies [45 °, 0 °, -45 °, 90 °], stringer ply [45 °, -45 °, 0 °, 0 °], material layer thickness t=0.125mm, skin thickness 1mm, length 40mm.
[3] Mei-Wen Guo,Issam E.Harik,Wei-Xin Ren.Buckling behavior of stiffened laminated plates.International Journal of Solids and Structures,2002,39:3039~3055
Chiara Bisagni simulated stiffened panel's buckling and post-buckling behavior under average compression loads.In the model,stringers are simulated as torsion bars.Simply and fixed supported stiffened panel's buckling load is derived according to minimum potential energy principle.The error between results calculated and FEM is less than 12%[1].Nian-Zhong Chen has been evaluated the stiffened panel's reliability under compression loads with finite difference method and applied stiffness reduction method in the failure process of stiffened panels under compression loads[2].Mei-Wen Guo used the relative degree of freedom shell and beam elements discrete composite stiffened panels and stringers,established bidirectional stiffened panel finite element model,calculated their buckling behavior under average compression loads and discussed the influence on buckling load values by stringer height ,thickness and material ply[3].Xu Liangliang numerically simulated the buckling and post-buckling behavior
The material properties of single model layer are shown in Table 1.
Fig.1 Flute type stiffened panel finite element model Table1 Single ply material properties E1/MPa E2/MPa μ12 G12/MPa G13/MPa G23/MPa 127500 9000 0.28 4900 4900 3600 The geometry parameters of composite stiffened plate is: skin length L=590mm, width W=440mm,skin plies [45 °, 0 °, -45 °, 90 °], stringer ply [45 °, -45 °, 0 °, 0 °], material layer thickness t=0.125mm, skin thickness 1mm, length 40mm.
[3] Mei-Wen Guo,Issam E.Harik,Wei-Xin Ren.Buckling behavior of stiffened laminated plates.International Journal of Solids and Structures,2002,39:3039~3055
Online since: June 2014
Authors: Yun Wang, Xi Chen, Xiang Yu Ding
As the sealing ring structure and stress have axial symmetry, therefore in the process of calculation, equivalent and simplifying of model as following : without considering material defects, the influence of residual resistance friction force ,thickness and the contact between the model surface, considering material is isotropic , set an axis—metric model.
Derivative formula (6), and make this into formula(5) and we can get: (7) Assume the gas flow rate as 0 when under high pressure, according to formula (5) and (7), the Leakage rate is: (8) Thus, sealing performance was determined by pressure gradient under the certain environment of structure and working conditions, while the pressure gradient was determined by material and working conditions.
The material of sealing ring is GH4169[2].
Acknowledgement It is a project supported by the Natural Science Foundation of China (51266012) .
Journal of Nanchang Hangkong University Vol.27 No.2, 2013
Derivative formula (6), and make this into formula(5) and we can get: (7) Assume the gas flow rate as 0 when under high pressure, according to formula (5) and (7), the Leakage rate is: (8) Thus, sealing performance was determined by pressure gradient under the certain environment of structure and working conditions, while the pressure gradient was determined by material and working conditions.
The material of sealing ring is GH4169[2].
Acknowledgement It is a project supported by the Natural Science Foundation of China (51266012) .
Journal of Nanchang Hangkong University Vol.27 No.2, 2013
Online since: July 2016
Authors: Monika Tatarková, Peter Tatarko, Ján Balko
Wear Behavior of Stoichiometric and Nonstoichiometric Zirconia
BALKO Ján 1, a*, TATARKOVÁ Monika 1,b, TATARKO Peter 1,c
1Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, Slovak Republic
ajbalko@saske.sk
Keywords: zirconia, tribology, stichiometry, friction coefficient, wear rate
Abstract.
Materials sintered at 1450°C had higher values of hardness (~ 1.2 GPa) than materials sintered at 1250°C.
Fig. 2a shows wear rate for materials sintered at 1250 °C.
Summary Four kinds of zirconia materials have been tested.
√m), materials sintered at 1450°C had toughness values from 5.9 – 6.1 MPa.
Materials sintered at 1450°C had higher values of hardness (~ 1.2 GPa) than materials sintered at 1250°C.
Fig. 2a shows wear rate for materials sintered at 1250 °C.
Summary Four kinds of zirconia materials have been tested.
√m), materials sintered at 1450°C had toughness values from 5.9 – 6.1 MPa.