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Online since: November 2012
Authors: Ling Cao
Design and Optimization of Elastic Diaphragm in Miniature High-Temperature Pressure Sensor
Ling Cao
Department of Mechanical and Electrical Engineering, Baoji University of Arts and Sciences, Baoji 721016, Shaanxi, P.R.
Meanwhile, the maximum stress of the diaphragm which can withstand is far lower than the material yield strength as the diaphragm area smaller, so the diaphragm can not easily breakage and deformation when pressure applied on it.
Deng: Journal of Northwestern Polytechnical University, Vol. 26 (2008) No.6, p.782.
Meanwhile, the maximum stress of the diaphragm which can withstand is far lower than the material yield strength as the diaphragm area smaller, so the diaphragm can not easily breakage and deformation when pressure applied on it.
Deng: Journal of Northwestern Polytechnical University, Vol. 26 (2008) No.6, p.782.
Online since: January 2011
Authors: Jing Song Shan, Zhong Yin Guo
Study On Joint Deflection of Existing Joint Plain Concrete Pavement Upon Adoption of Hot Mixture Asphalt Overlay
Jingsong Shan 1,aand Zhongyin Guo2
1School of Transportation Engineering, Tongji University, Shanghai of China, Postal code 201804
Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation (Shandong University of Science and Technology), Qingdao of China, Postal code 266510
2School of Transportation Engineering, Tongji University, Shanghai of China, Postal code 201804
acyhsjs@163.com
Keywords: Joint plain concrete pavement, Asphalt overlay, Joint deflection, Spring element, Shear stress, Deflection criterion
Abstract.
The equation (2) and (3) can be given by; (2) (3) where: =shear stress ks =elastic coefficient of spring Δ =defferential movements of corresponding nodes at the joint =shear strain between the slabs b =average distance of nodes Introducing (3) into (2) yields (4) By the transpose of ks, equation (4) becomes (5) When the value of ks is close to equation (5), the material property of joint is similar to cement concrete slab and no differential movements occur at the joints under traffic loading.
Sun: China Civil Engineering Journal, Vol. 34, (2001) p. 45 [4] X.
The equation (2) and (3) can be given by; (2) (3) where: =shear stress ks =elastic coefficient of spring Δ =defferential movements of corresponding nodes at the joint =shear strain between the slabs b =average distance of nodes Introducing (3) into (2) yields (4) By the transpose of ks, equation (4) becomes (5) When the value of ks is close to equation (5), the material property of joint is similar to cement concrete slab and no differential movements occur at the joints under traffic loading.
Sun: China Civil Engineering Journal, Vol. 34, (2001) p. 45 [4] X.
Online since: January 2014
Authors: Liang Li
By the tool deflection compensation, we can make residual material removal knife, take the knife to ensure a thin wall thickness accuracy.
2 Processing Examples and Results
In order to verify NC tool deflection compensation feasibility, we arranged some experiments.
References [1] Hiroyasu IWABE, Masaki MIZUOCIH and Kazuhiro YOKOYAMA, Study on Machining Accuracy of Thin Wall Workpiece by End Mill, Japan Society of Mechanical Engineers Volume 63, No. 605 (1997.1) [2] J.Tlusty, S.Smith and J.Badrawy, Design of a High Speed Machine for Aluminum Aircraft Parts, Manufacturing Science and Technology, Vol.2/1997 [3] S.Smith, D.Dvorak, Tool path strategies for high speed milling aluminum workpiece with thin webs, Mechatronics 8 (1998) 291-300 [4] Hauki OBARA et al, A Method to Machine Three-Demensional Thin Parts, Initiatives of Precision Engineer ing at The Beginning of Millennium 2001 [5] Kline,WA, Devor, RE, and Lindberg, R, , The Prediction of Cutting Forces in End Milling with Application to Cornering Cuts, International Journal of Machine Tool Design and research, 22(1):7-22. (1982)
References [1] Hiroyasu IWABE, Masaki MIZUOCIH and Kazuhiro YOKOYAMA, Study on Machining Accuracy of Thin Wall Workpiece by End Mill, Japan Society of Mechanical Engineers Volume 63, No. 605 (1997.1) [2] J.Tlusty, S.Smith and J.Badrawy, Design of a High Speed Machine for Aluminum Aircraft Parts, Manufacturing Science and Technology, Vol.2/1997 [3] S.Smith, D.Dvorak, Tool path strategies for high speed milling aluminum workpiece with thin webs, Mechatronics 8 (1998) 291-300 [4] Hauki OBARA et al, A Method to Machine Three-Demensional Thin Parts, Initiatives of Precision Engineer ing at The Beginning of Millennium 2001 [5] Kline,WA, Devor, RE, and Lindberg, R, , The Prediction of Cutting Forces in End Milling with Application to Cornering Cuts, International Journal of Machine Tool Design and research, 22(1):7-22. (1982)
Online since: September 2014
Authors: Xue Qing Tang, Pei Cheng Wu, Shou Cai Ma
Introduction
Light steel has been more and more applied to adding storey and reinforcement project as a kind of new material, because of its good mechanical performance, as well as the characteristics of high strength and light weight.
Acknowledgement This work was financially supported by the the science and technology projects of Housing and construction department of Gansu province in 2012--- “Design research of strengthening and seismic on the light steel storey adding structure, which based on concrete structure”(project number JK2012-17).
Journal of Vibration and Shock, Vol.2(1985)
Acknowledgement This work was financially supported by the the science and technology projects of Housing and construction department of Gansu province in 2012--- “Design research of strengthening and seismic on the light steel storey adding structure, which based on concrete structure”(project number JK2012-17).
Journal of Vibration and Shock, Vol.2(1985)
Online since: September 2012
Authors: Chu Hui Liu
MACHINING SECURITY EVALUATION
(a) acceptable (b) unacceptable
Fig.4 Probable machining problem of initial joint hole
As shown in Fig.4 (b), if orientation error of a wing-fuselage joint is too big, part of its initial connecting hole will have no material to be machined in FMP.
Journal of Zhejiang University SCIENCE A, 10(11):1624-1630
Journal of Zhejiang University SCIENCE A, 10(11):1624-1630
Online since: July 2014
Authors: Wu Mei Zhang, Xing Huang
Calculation for Earth Pressure of Cavity Expansion Considering Displacement
WUMEI ZHANG1, a, XIN HUANG2,b
1,2School of Transportation Science and Engineering BUAA, Beihang University, 37 Haidian Street ,Beijing, 100191, P.
Without considering the friction effect between the soil units and retaining structure, the input material parameters includes: gravity of soil γ (KN/m3), elastic modulus E (KPa), soil cohesion c (KPa), Poisson ratio μ, frictional angle φ(º), void ratio e, Saturation ω, osmotic coefficient k (cm/s), and each parameter selects 4 or 5 different number, assuming the distance between a point on the wall of the hole and the ground is h (m), initial radius of the hole is r (m), the expansion displacement of the wall is x (m).
[3] Yekai Chen, Yimin Wang, Riqing Xu and Xiaonan Gong: Chinese Journal of Rock Mechanics and Engineering, Vol.23 No.6 (2004), p. 980-988
Without considering the friction effect between the soil units and retaining structure, the input material parameters includes: gravity of soil γ (KN/m3), elastic modulus E (KPa), soil cohesion c (KPa), Poisson ratio μ, frictional angle φ(º), void ratio e, Saturation ω, osmotic coefficient k (cm/s), and each parameter selects 4 or 5 different number, assuming the distance between a point on the wall of the hole and the ground is h (m), initial radius of the hole is r (m), the expansion displacement of the wall is x (m).
[3] Yekai Chen, Yimin Wang, Riqing Xu and Xiaonan Gong: Chinese Journal of Rock Mechanics and Engineering, Vol.23 No.6 (2004), p. 980-988
Online since: October 2013
Authors: Jia Jun Ma, Jian Hua Zhao
Spectroscopic Methods Used for Structural Analysis of Natural Crystals
Zhao Jianhua and Ma Jiajun
Heilongjiang University of Science and Technology, Harbin 150022 China
zhjh6868@126.com
Keywords: Natural Crystal Growth, Spectroscopic Methods, Crystal Growth
Abstract.
The same color of the material in the same direction of the crystal absorption intensity of visible light can cause crystals in different shades of color differences, so this area is caused by the absorption intensity differences resulting yellow color change amethyst and citrine crystal shades differences the main reason.
Klabunde: Chemistry-A European Journal, Vol.8 (2002), p.3991
The same color of the material in the same direction of the crystal absorption intensity of visible light can cause crystals in different shades of color differences, so this area is caused by the absorption intensity differences resulting yellow color change amethyst and citrine crystal shades differences the main reason.
Klabunde: Chemistry-A European Journal, Vol.8 (2002), p.3991
Online since: August 2013
Authors: Chao Sun, Shu Li Zhao, Wen Jing Chai, Ze Qun Liu
In this paper, through SAP2000 the test model [1] is simulated and analyzed, the reasonable method is derived for analyzing shaped column frame.
2 Shaped reinforced concrete columns frame test model
The reinforcement model figure is shown in Figure 1.
2.1 Material performance
The average value of measured concrete cube compressive strength is 53Mpa, the elastic modulus is 36693Mpa.
[2] Zhao Guo fan .Higher reinforced concrete structure science [M] Beijing: China Electric Power Press, 1999
Journal of Chongqing Jianzhu Universit .2000,22 (1): 26 to 32 [6] JGJ3-2010.
[2] Zhao Guo fan .Higher reinforced concrete structure science [M] Beijing: China Electric Power Press, 1999
Journal of Chongqing Jianzhu Universit .2000,22 (1): 26 to 32 [6] JGJ3-2010.
Online since: March 2010
Authors: Cheng Li, Ying Tie, Yan Ping Zheng
The results of stress field
distribution around hole can be used to resolve the material fracture due to the external load, and
provide an important data for design of mechanical structure with hole.
Acknowledgement The project is supported by the National Natural Science Foundation of China(50975261)and Scientific and Technological Foundation of He'nan Educational Committee(2009A460009) References [1]X.Q.
International Journal of Fatigue Vol. 330-335(2007), p.330-335 [4] C.M.
Acknowledgement The project is supported by the National Natural Science Foundation of China(50975261)and Scientific and Technological Foundation of He'nan Educational Committee(2009A460009) References [1]X.Q.
International Journal of Fatigue Vol. 330-335(2007), p.330-335 [4] C.M.
Online since: December 2011
Authors: Sheng Tao Zhang, Qing Wang, Yang Zhang
Benzene is an important chemical raw material, widely used in chemical industries.
Huaiman Chang,in: The behavior of chemicals in soil and environmental quality, Social Science Press,first ed.
YiLi,Quanjiu Wang,Wenyan Wang:Journal of Irrigation and Drainage.Vol.26(2007),p.5 [5].
Huaiman Chang,in: The behavior of chemicals in soil and environmental quality, Social Science Press,first ed.
YiLi,Quanjiu Wang,Wenyan Wang:Journal of Irrigation and Drainage.Vol.26(2007),p.5 [5].