Search results

Choo: Material Science and Engineering, Vol. 252A (1998), p. 256-268
Xin: Journal of Nuclear Materials, Vol. 407 (2010), p. 189-194.

In practical project, surface is made of a material with physics properties.
We consider the normal stress only.For a bar, its original length is, after tension, its length is , deformation is , normal stress is , according to the hooke’s law , F stands for external force, E is the elastic modulus of the material, A is the cross section area of the bar.
This method can be used in sheet metal manufacturing process to get the reasonable blank shape, reduce the subsequent allowance, save material and decrease cost.
Acknowledgment This work is supported by Development Program of Shaanxi Science and Technology Research under Grant No. 2011K07-11, namely “Research on Sheet Metal Manufacturing Process Knowledge Base System”, and Shaanxi 13115 Technology Innovation Program under Grant No. 2010FWPT-05, namely “Technological Innovation Public Service Platform for SME aggregation industry”, and Shaanxi Industrialized Program under Grant No. 2010JC09.
Journal of Northwestern Poly Technical University. 16(1998) 327-332

Discrete analysis of maize ear at different impact head Li Xinping ,Du Zhea, Ma Yidong, Gao Chunyan, Ma Fuli College of agricultural engineering, Henan University of Science and Technology, Luoyang China, 471003 aEmail:duzhe03@sina.com KeyWords: maize,moisture,impact head, threshing, breakage,discrete Abstract: In order to find the best impact head and threshing moisture content to damage the arrangement law of maize ear,the impact test with different varieties and different moisture of the maize ear is carried out in the drop impact test bench.
Thus, it is necessary to test the impact on maize ear, comparative analysis of threshing discrete characteristics and kernel injury of different varieties maize ear in the different impact heads and moisture contents.And it can provide the theoretical guidance for the design of subsequent threshing machine. 1 Test materials and methods 1.1 Test material The test maize varieties as Zhengdan 958 and Beiqing 210 artificial harvesting,moisture content are 23.8% and 22.5%.All maize ears are treated to a moisture content,as 20.4%,more than 20% of the high moisture area,which is equivalent to a kernel in harvest period.16.7%,(14% to 20%) the middle moisture area,which is equivalent to damp or dry kernel.13.2%,(12% to 14%) the standard moisture area, which is equivalent to a kernel put in storage.10.2%, less than 12% of the low moisture area,which is the equivalent of a very boring kernel[4]. 1.2 Test equipment The test apparatus includes a moisture tester and a maize ear impact test system.Test
[3]Zhao Xuedu Ma Zhongsu,Sun Yonghai.Experimental study of the mechanical properties of grain maize [J]．Journal of jilin university of technology，1996，21(1)：60~65

According the materials of the accompanying tube(Aluminum alloy 6063-T651), we can determine the projectiles of the accompanying: elastic modulus is 69Gpa; density is 270Kg/m3; Poisson’s ratio is 0.33.
The maximum stress is266.6MPa.At this node ,the varying curves of stress flowing with time is shown in Fig. 6.The maximum stress is less than the compressive strength of this material, which meet the design requirements, Besides ,there is a problem that the accompanying tube is easily fractured at the boss during the high-speed repeated impact process .
Acknowledgment The author wish to acknowledge the support of the operation expenses for universities' basic scientific research of central authorities (HEUCFZ1025); the ministry of education institution of higher learning doctor discipline end scientific research fund aids a project financially (20102304110007); the public fund from The Ministry of Science and Technology of China (2005DIB3J138).
Wand: Journal of China Ordnance Society.

The influence of Ni and Cr on the primary austenite dendrite in D-type graphite cast iron Di Chu1, a, Xudong Yue1,b, Shu Xu1,c and Jin Liu1,d 1School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou 121001, China a232810566@qq.com, bx.d.yue@163.com, csuxsu@126.com, d279383596@qq.com Keywords: Alloy element, D-type graphite, Primary austenite dendrite.
Experimental contents and methods Using pig iron and scrap steel as raw material targeted at Titanium addition to 0.2 percent, carbon equivalent 4.1 percent D-type graphite cast iron for the study.
[12] Bing Liu, Xiaoyan Zhou: Journal of Xinjiang institute of technology.

Reduced-scale Model Tests of Fires in Railway Tunnel and Structure Fire Safety HongLi Zhao 1, a, ZhiSheng Xu 1,b and XuePeng Jiang 1,c 1Institute of Disaster Prevention Science and Safety Technology, Central South University, Changsha 410075, China azhaohonglixh@126.com, bxuzhsh82@163.com, cjxp5276@126.com Keywords: reduced-scale fire model tests; smoke temperature distribution; smoke velocity; backlayering distance Abstract.
Methanol (with materials that can emit smoke) was used as fuel.
KHOURY: Progress of Structure Engineering Material, 2000, Vol.2, p. 429-447
XU: Journal of the China Railway Society, 2004, Vol.1, p. 124-128, in Chinese

Electromagnetic Simulation and Dynamic Analysis about the Electromagnetic Propelling System of Magnetic Suspension Launcher Yunsheng Zhang a, Xiaoning Chen b, Liyang Huang c and Peng Chen d National Key Laboratory on Electromagnetic Environmental Effects and Electro-optical Engineering, PLA University of Science and Technology, Nanjing 210007, China ayunsheng_zhang@163.com, bcxnbox@163.com, c345949836@qq.com, dchp1987@sina.com Keywords: magnetic suspension, launcher, magnetic field distribution, polar distance, coil interval Abstract: Launcher is widely used in rescue and delivering items.
The intensity, variation and distribution of the magnetic field in different medium, the interlinking of the magnetic field and current, the material, form and size of the projectile [1] will determine the performance of the launcher.
The transient magnetic field simulation and calculation In the electromagnetic propelling system of magnetic suspension launcher, ferromagnetic material is nonlinear and the secondary is in motion.
In other words, the magnetic field, which is generated by the primary of the cylindrical linear induction motor with larger polar distance, can cut the secondary projectile with faster speed, so that the secondary projectile of the same material and dimension will be launched at faster speed.
Journal of the China Railway Society, 2006:28(3)

There is no one use bicomponent parallel reaction model to simulate biomass combustion process recently, so this article will use bi-component parallel reaction kinetics model to simulate the combustion process of biomass (sawdust), and solve its dynamics parameters. 2 Experiment part 2.1 Materials and equipment In this paper, the biological samples is taken from the sawdust in Jilin area and use the Pyris-1 Thermogravimetric analyzer produced by United States PerkinElmer company.The analyzer can real-time display samples’ weight, self-adjust to zero and calculate with standard procedure, etc.
With temperature increasing, low molecular weight material begins to decompose gasify first.
Progress in Energy and Combustion Science, Vol. 2 (2004), p. 219-230 [2] H.
Journal of Engineering for Thermal Energy and Power, Vol.5 (2002), p. 451-454 [3] X.

A Mechanical Calculation of the Flexible & Floating Anti-ship Collision Device for Bridge Piers Wei Lv1, a, Ruilin Lu1, b, Xiangliang Ning 1, c,Yuan Yuan 1, d , Yuxin Hu 1, e Huajuan Zeng 1, f 1ZhuZhou Times New Material Technology Co., Ltd., Zhuzhou, Hunan, 412007, China, alvwei@teg.cn, bluruilin@teg.cn, cningxiangliang@teg.cn, dyuanyuan@teg.cn, ehuyuxin@teg.cn fcenghj@teg.cn Keywords: anti-collision of the pier, flexible energy-absorbing anti-collision, finite elements, ABAQUS Abstract.
“Application of the Anti-collision System in Bridge Projects ”, in Science and Technology of Overseas Building Materials[J].2007, 28(6), In Chinese
“A Three Dimensional Analysis of the Ship Collision[J]” .Journal of Ssssri, 1986(1), In Chinese

Assuming linear - elastic characteristics of the material in the entire load range, the angle δ defining the position of bending, has a constant value, which can be described by the equation: tgδ=EIxEIytgβ (1) For the rectangular section, we obtain: tgδ=hb2tgβ (2) Fig. 1.
Materials and Structures. 43/2010, pp. 1247-1248
Lejano, Investigation of biaxial bending of reinforced concrete columns through fiber method modeling, Journal of Research in Science, Computing, and Engineering 4:3/2007