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Here, the specially adapted joining elements limit the convertibility of the process to different materials, including thin sheet materials [11] [12].
In: Journal of Materials Processing Technology 214 (2), S. 151-164, 2014, https://doi.org/10.1016/j.jmatprotec.2013.08.015 [6] Martinsen, K., Hu, S.
Joining of dissimilar materials.
Journal of Manufacturing Science and Engineering, https://doi.org/10.1115/1.4025421 [9] Yunwu Ma, Sizhe Niu, Huihong Liu, Yongbing Li, Ninshu Ma, Microstructural evolution in friction self-piercing riveted aluminum alloy AA7075 T6 joints, Journal of Materials Science & Technology, Volume 82, 2021, Pages 80-95, https://doi.org/10.1016/j.jmst.2020.12.023
Experimental tests and mesoscale numerical simulations, Journal of Materials Processing Technology, Volume 294, 2021, 117133, https://doi.org/10.1016/j.jmatprotec.2021.117133 [13] Johan Kolstø Sønstabø, David Morin, Magnus Langseth, Testing and modelling of flow-drill screw connections under quasi-static loadings, Journal of Materials Processing Technology, Volume 255, 2018, Pages 724-738, https://doi.org/10.1016/j.jmatprotec. 2018.01.007

Analysis of Piezoelectric Acoustic Sensor Based on Negative Impedance with FEM in Composite Materials Wenqun Zhang1, a, Xinyue Wu1,b and Wen Cao2,c 1Department of Mechanical Engineering, NUE, Wuhan, China 2Wuhan Environmental Protection Science Research Institute, Hubei, China awenqun@sina.com, bwuxinyue@hotmail.com, cczlinjie@sina.com Keywords: piezoelectric acoustic sensor, sensitivity, negative impedance, coupled multiphysics FEM Abstract.
Introduction Piezoelectric materials are important functional materials widely used in many fields, such as measures, controls, communications and electronics, etc.
When presented as the relation of stress and electric displacement, it is (4) (5) In these equations, is the stress in the materials, the strain, the electric field, and the electric displacement. is the stiffness matrix at constant electric field. and are piezoelectric coefficient and its transpose, respectively. is the dielectric coefficient in void. is the relative dielectric coefficient of piezoelectric material.
Acknowledgments This research was supported by National Natural Science Foundation of China (NSFC: 50605062).
Karl, Journal of Sound and Vibration, Vol.298 (2006), p. 84 [6] J.

The vibrating mixer mixes some different materials, but the mixing uniformity is poor and the mixing efficiency is too low.
Bonding materials, retention and non-normal motion occurred in some silo, hopper and chute of the silo wall.
Acknowledgements This project is supported by National Natural Science Foundation of China (Grant No. 51375221), Natural Science Fund in Jiangsu Province (BK2012865), Scientific and technological projects of Zhengzhou City (20130797) and College Students Practice and Innovation Projects in Jiangsu Province (201311276008Z).
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At present, there are many methods to utilization of the tailings, for example, large quantity of waste rock is usually used as building material, and fine-grained tailings are used to make ground brick and cement material, besides some are also made as new wall materials. 4) Ecological environment protection for ultra lean magnetite resource exploitation land should be valued.
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Thermal Science. (2017) doi.org/10.2298/TSCI170323139J.

It shows that the variability of material properties of reinforced concrete structures significantly impacted the mean deflection of the beam mid-span.
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Experimental materials and methods Set-up.
Materials and apparatuses.
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Çiftçioğlu and F.Özkan Materials Science and Engineering Graduate Program , İzmir Institute of Technology, URLA, İZMİR,TURKEY Keywords: Sol-gel, silica, membrane, gas permeation, ceramic Abstract.
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Deformation behavior of semi-solid steels fabricated by electromagnetic stirring KANG Yonglin 1,2,a, SONG Renbo 1,b, LI Jiguang 1,c and ZHAO Aimin 1,d 1 School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China a kangylin@mater.ustb.edu.cn, bsongrb@263.net, claserli@sina.com, dzhaoaimin@hotmail.com Keywords: Semi-solid, Steel, Compression, Deformation, Stress Abstract.
The spring steel 60Si2Mn and stainless steel 1Cr18Ni9Ti are employed as experimental materials fabricated by electromagnetic stirring.
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