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VHCF strength of helical compression springs - Influence of heat treatment temperature before shot peening Isabell Brunner1, a *, Desislava Veleva1, b, Jörg Beyer1, c, Matthias Oechsner1, d 1State Materials Testing Institute Darmstadt, Chair and Institute for Materials Science, Technische Universität Darmstadt, 64283 Darmstadt, Germany abrunner@mpa-ifw.tu-darmstadt.de, bveleva@mpa-ifw.tu-darmstadt.de, cbeyer@mpa-ifw.tu-darmstadt.de, doechsner@mpa-ifw.tu-darmstadt.de, *corresponding author Keywords: Helical compression springs, SiCr-alloyed valve spring steel, very high cycle fatigue test, heat treatment temperature Abstract.
To analyse the influence of different materials and production parameters on the VHCF fatigue strength of helical compression springs, a project was initiated at the Institute for Materials Technology at the Technische Universität Darmstadt [2].
By adjusting production parameters, the reliability of helical compression springs can be improved for a very high number of cycles even for cost-efficient spring wire materials.
Vol. 4, Elsevier Science Pub.
Sonsino, Course of SN curves especially in the high-cycle fatigue regime with regard to component design and safety, International Journal of Fatigue 29, 2007

Acknowledgements This work was financially supported by the National Social Science Funds of China (08BTQ023) and self-determined research funds of CCNU from the colleges’ basic research and operation of MOE (CCNU10B01002).
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Accordingly, in order to improve atmospheric visibility, protect human health, and reduce ecological damage, it is very much crucial to investigate the characteristics of particulate matter during brown haze for developing effective air pollution control measures in Harbin. 2 Material and methods Sample collection In order to investigate the impacts of brown haze episodes on ambient air quality, daily PM10 samples were consecutively collected from December 30, 2008 to January 12, 2009, including 5 haze days, 4 non-haze days, and 5 transition days.
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Analysis of Unconfined Compressive strength Calculation Formula of Soil-cement Youxi Wang 1,2,a, Junqing Ma 1,b 1Civil Department, Engineering College of CAPF, Xi’an 710086, China 2 Energy school, Xi’an University of Science and Technology, Xi’an 710054, China a w4997710@126.com, bjunqing_11@163.com Key words: cement soil; unconfined compressive strength; influence factor Abstract.
Introduction The soil-cement is widely used in kinds of engineering, such as seepage-proofing in water conservancy engineering, impermeable foundation ditch and abamurus revetment in construction engineering and roadbed reinforcement in highway engineering because of its good performance, low price and wide origin in soil-cement material [1, 2, 3].
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According to data acquisition and evaluation requirement, select the evaluation index as follows: (1) Ground slope(C1): steep slope reduces the friction of loose solid material on a slope, so shear stress is increased, eventually leading to failure of slope
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Study on online mixing pesticide technology and automatic control and detection of concentration Hanxiang Chen1,a,Zhigang Chen1, b,Xin Zhao2,c,Mengxi Chen2,d and Junjing Chen3e 1School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing,Jiangsu,210044,China 1 Key Laboratory of Modern Agricultural Equipment and Technology in Jiangsu University and Ministry of Education,Jiangsu University, Zhenjiang, Jiangsu, 212013, China 2School of Electrical and information engineering,Jiangsu University,Zhenjiang,Jiangsu,212013,China 3School of Environment engineering,Jiangsu University,Zhenjiang,Jiangsu,212013,China aWilliamchensong@126.com,bchenzg@ujs.edu.cn, czhaoxin_sy@126.com, dmengxi17@163.com,echengjunjing000@163.com Keywords: pesticides light permeability, concentration feedback,online mixing drugs, environmental security Abstract.
The structure of concentration detection unit , shown in Figure 2 , Highlight LED, the transparent window, a transparent flow path , photocells , etc. , and the outside with a dark material , the overall package protects the detection signal from interference of external light .
Journal of Anhui Agricultural Sciences,2012,40(31):15236~15238 [3] Tian Xiaohua,Chang Yanqin,Yu Zhu,et al.Study on quick measurement of lactose content in milk with dioptric method[J],Journal of Heilongjiang Bayi Agricultural University,2011,23(5):60~63

Cheng4,d 1 School of Defense Science Studies, Chung Cheng Institute of Technology, National Defense University , Taiwan, R.O.C 2 Department of Biomechatronics Engineering, National Pingtung University of Science and Technology, Taiwan, R.O.C 3 Department of Power Vehicle and System Engineering, Chung Cheng Institute of technology, National Defense University, Taiwan, R.O.C 4 Department of Power Mechanical Engineering, Army Academy, Taiwan, R.O.C a valky_liu@hotmail.com.tw, b jmmiao@mail.npust.edu.tw, c tlliu@ndu.edu.tw, dcheng5721@gmail.com Keywords: Active micro-mixer, CFD, Mixing efficiency, Mixing mechanism, Wankle-type rotor.
In key material of biotechnology, the characteristics of a micro-mixer include small in size, less samplings required, fast reaction time, reduced experimental errors caused by manual operation, increased overall system stability, reduced sample consumption and shortened testing time.
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Kim: Continuous Casting and Rolling for Aluminum Alloy Wire and Rod, Materials Science Forum, Vol. 638-642 (2010), p. 255-260
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Measuring instruments, auxiliary equipment, materials and reagents.
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The essence of coal mine production logistics internal control is the analysis, control and optimization for the multiple logistics subsystems including coal flow, personnel flow, material flow, equipment flow, wind flow and power flow.
It refers to the process that a complex system far from balance state exchanges energy, material and information with the environment, negative entropy increases under the interaction with each unit, the increasing of the organization disordered degree is greater than its own and then form a new ordered structure and produce new energy.
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