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Methods for Crack Prevention of Large Volume Concrete Foundation of High-rise Building Guo Jinjun1,a and WANG Wei2,b∗ 1 Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China 2 Department of Civil Engineering, Shaoxing University, Shaoxing 312000, China a gjjcivil@yahoo.cn, bwellsking.wang@gmail.com Keywords: crack prevention; concrete foundation; high-rise building; control methods Abstract.
The designs of concrete materials and mixture ratio are crucial, and choosing primary materials rationally is the key of active control.
For various reasons, the present foundation thickness is designed very conservatively; this is a waste of material and increases the difficulty to control the crack at the same time.
Arnon: ACI Materials Journal, Vol. 106(2009), p.537 [2] M.
Adil and B.Peter: ACI Materials Journal, Vol. 100(2003), p.492 [9] L.

Research significance Using iron ore tailings as a partial fine aggregate can decrease energy and raw materials consumption.
Materials.
Acknowledgments This work was financially supported by the Research Project of Science and Technology Program of Beijing Government (D08040300200801) and the Open Fund of Key Laboratory of Transportation Engineering of Beijing, Beijing University of Technology.
References [1] Shuhui Zhang, Xiangxin Xue, Zaifeng Jin: Journal of Materials and Metallurgy.
[2] Jiwei Cai; Shaobo Zhang; Guixiang Hou: Journal of Wuhan University of Technology.

Batista3, d 1 Department of Mechanical, Energy and Management Engineering, University of Calabria, Rende CS 87036, Italy. 2 LaBoMaP, Arts et Metiers ParisTech, 71250 Cluny, France 3 X-Ray Diffraction Center for Materials Research, University of Coimbra, 3030-380 Coimbra, Portugal aserafino.caruso@unical.it, bjose.outeiro@ensam.eu, cd.umbrello@unical.it, dcastanhola@fis.uc.pt Keywords: Hard Turning, Cryogenic cooling, White layer, AISI 52100 Abstract.
Further corrections to the residual stress data were made due to the volume of material removed.
Astakhov, “Machining residual stresses in AISI 316L steel and their correlation with the cutting parameters”, Machining Science and Technology, 2002, 6/2: pp. 251-270
Yang, “Formation of white layers in steels by machining and their characteristics”, metallurgical and materials transactions, 2002, 33: pp. 1245-1254
Umbrello, “Influence of material microstructure changes on surface integrityt in hard machining of AISI 52100 steel”, International Journal of Advanced Manufacturing Technology 54 (9): pp. 887-898

Materials and Methods Materials Fe(Cl)3, Al(Cl)3.6H2O, Cu(Cl)2, SDS, chloroform, methanol, and L-lactic acid (88-92%) were purchased from Merck, Germany.
Other materials required was purchased locally.
Peng, Recent progress of preparation of branched poly(lactic acid) and its application in the modification of polylactic acid materials.
International Journal of Biological Macromolecules. 193 (2021) 874–892
Progress in Polymer Science (Oxford). 34 (2009) 99–124

Studies on the Bioceramic Coating on Titamium Substrate Including Silicon and Calcium by Micro-arc Oxidation and Osteoblast ’s Adhesion and Proliferation on the coating Dechao Li1, a, Xin Liu1,b, Lei Han1,b,Jinlong Li1,b,Su Cheng2,b 1The Affiliated Stomatological Hospital of Jiamusi University,Jiamusi 154004,China 2 The Material Institute of Harbin Institute of Technology, Harbin 150080,China adechaoli2004@yahoo.com.cn, bhunterxinxin@163.com Keywords: Porous Titanium; Micro-arc Oxidation; Osteoblast Abstract.
Materials and methods Porous titanium sintering.
With high-strength graphite for mould materials, preparation of 30mm×30mm×10mm square mold, the mold wall was daubed BN ceramic layer which prevented the reaction between moulds and titanium beads by reason of the high sintering temperature.
Acknowledgements We appreciate the National Natural Science Foundation of China (Grant number50872025, 51002039) for financially supporting this work.
Journal of Biomedical Materials Research, 2003, 67(1): 655-665

Introduction Recent applications of TiN films include the surface modification of orthodontic appliance materials [1], TiN-coated carbon fiber cathode for high emission of electrons [2], TiN-filmed proton-exchange membrane fuel cell [3], and the hottest application may be to the photo-thermal agents for cancer therapy. [4] & [5] The nitrogen implantation as the interlayer of TiN/N2 on the substrate NAK80 steel is important because of its excellent effect of both surface hardening and anti-corrosion of substrate surface, nevertheless high current of nitrogen is not a solid metal but a gas.
Conditions for TiN Deposition Symbols Substrate Surface Temperature(°C) Deposition time (Min) Bias Voltage (V) Gas Pressure (Torr) A 420 55 800→270 5.8 × 10-3 B 350 50 400→180 5.8 × 10-3 C 500 80 800→270 4.5 × 10-3 M Before Deposition (NAK80) The first advantage of the nitrogen ion film is that it can create unbalanced structures and metallurgical phase properties that cannot be processed on the bulk material and can form crystalline and glassy phases.
Yao, Journal of Materials Science 54 (2019) 5743-5756
Hwang, Key Engineering Materials 777 (2018) 132-137

It is clear that with a protrusion, the filling ratio is much better, due to the pre-distribution of material.
The velocity vector points to the housing wall, which implies that the material flows partially to the housing wall.
To avoid this problem, R9 is designed to a smaller one in first sizing, which can increase the back flow resistance of material and make more material flow into small fillets.
Acknowledgement The authors would like to express our gratitude to the support by special fund of Jiangsu Province for Transformation of Scientific and Technological Achievements, and National Natural Science Foundation of China (No. 50975175) for the financial support to this study.
Liu, Study on liquid bulge forming small tangential round corner of automobile axle housings, Journal of plasticity engineering. 8(2001) 36-39 (in Chinese)

Effect of UHMWPE Fiber Laminate on Effective Protection Area of Ceramic Composite Target Song Gaoa, Bin Chenb, * College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, China agaosong310035@163.com, bchenbin_gfkd@sina.com Keywords: UHMWPE, Fiber Laminate, Ceramic Composite Target.
Material model.
The corresponding material parameters are shown in Table 2, 3, 4, and 5 respectively.
Material parameters of aluminum, core and lead sleeve [6] Material ρ/(kg· m-3) E/GPa Et/MPa β fs aluminum 2700 70 0.3 330 730 1 0.7 core 7850 210 0.29 1200 2000 1 0.3 lead sleeve 11340 16 0.42 20 0 1 0.5 Table 4.
Journal of Ballistics, 2018, 30(3): 67-72

Metal flow rule of multi-way tube hydro forming for air handling unit Huadian WEN a, Xiaoting XIAO , Kai ZHANG and Ying CHEN Faculty of Material and Energy Guangdong University of Technology Guangzhou 510006 ，China aemail：whd2016@yahoo.cn Key words: hydro forming; multi-way tube; law of metal flow; numerical simulation Abstract.
Material model .The Material is pure copper, and its parameters are as follows: The diameter is 12mm; the length is 250mm; the thickness is 1mm; the mass density is 8.900000e-009; the Young's modulus is 1.198000e+005; the Poisson's ratio is 3.100000e-001 and its Stress-strain curve is showed in figure 3: Filling zone between tubes Forming zone End filling zone Fig.3 Stress-Strain Curve of copper Fig.5: Typical nodes position Boundary conditions.
Acknowledgements The authors would like to thank the National Natural Science Foundation of China(Granted No.U0934006)for funding this research.
[4] Zhang, S: Journal of Materials Processing Technology, Vol 91(1999), p236-244
[5] Wang Xiu-feng, Lang Li-hui: CAE design and application in Sheet metal forming (Beijing University Of Aeronautics And Astronautics Press, Beijing 2008) [6] Liu Quan-kun: Material forming basic principle (Mechanical Industry Press，Beijing:2005) [7] Fan Si-jian: Modern Hydro forming Technology(Defense Industry Press ,Beijing 2009)

The relationship between of CT number and volumetric strain When X-ray transmitting material, the intensity of X-ray obeys the following equation. )exp(0 x II mρµ−= (1) Where, 0I and I are incident intensity and the transmitted through material intensity of X-ray respectively, mµ is the absorption value per unit mass of material, ρis the volumetric density and x is the path length of radiation beams.
In fact, rather the damping per unit length of the transverse material is used and related to the medical scale expressed in Hounsfield-Units.
Fatigue and Creep Crack Growth in Fine Sand Asphalt Materials.
Journal of Testing and Evaluation, Vol. 25, No. 4, 1997, p. 424-428 [2] Yang Gengshe, Zhang Changqing.
Xi'an: Shanxi Science and Technology Press, 1998, p.79-90.