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Czajkowskiego Street, No. 109, 51-150, Wroclaw, Poland 2 Wroclaw University of Technology, The Institute of Materials Science and Applied Mechanics.
Journal of Achievements in Materials and Manufacturing Engineering. 24 (2007) 198-207
Bocian, Identification of composite materials at high speed deformation with the use of degenerated model.
Journal of Achievements in Materials and Manufacturing Engineering. 28 (2008) 171-174
Journal of Achievements in Materials and Manufacturing Engineering. 49 (2011) 305-312

Experimental Procedure The materials used in the experiments were a low carbon Nb-microalloyed steels, and the chemical compositions were shown in Table 1.
References [1] Liu Qing-you, Deng Su-huai, Sun Xin-jun, Dong Han, Weng Yu-qing: Journal of iron and steel research, international Vol.16 (2009), p.67 [2] E.V.
Hodgson: Materials Science and Engineering A Vol. 273-275(1999), p.448 [3] Chen Ji-ping, Kang Yong-lin, Hao Ying-min, Liu Guang-ming, Xiong Ai-ming: Journal of iron and steel research, international, Vol. 16(2009), p.33 [4] Koh-Ichi Sugimoto, Toshiki Muramatsu, Shun-Ichi Hashimoto, Yoichi Mukaid: Journal of Materials Processing Technology Vol.177 (2006), p. 390 [5] Fu Jun-yan: Iron and Steel.
Vol.40 (2005),p.1 [In Chinese] [6] Chen Liansheng, Na Shunsang, Dj Guobiao, Zhang Hongbo, Wang Yuexiang, Liu Zhenyu, Liu Xianghua and He Shuxing: Special Steel Vol.28 (2007), p. 10 [In Chinese] [7] Zhang Pi-jun , Liu Xiang-hua and Wang Guo-dong: Journal of Northeastern University (Natural Science) vol. 28 (2007), p. 57 [In Chinese] [8] Cao Jian-chun, Liu Qing-you, Yong Qi-long, Sun Xin-jun: Journal of iron and steel research, international, Vol. 14(2007), p.51 [9] Zhao Li-ping, Pang Zai-guang, Ma Yong-lin: Heat treatment of metals, Vol. 33 (2008), p.95 [In Chinese] [10] A.B.

Introduction Impacts of applied or residual stresses on grain boundary wetting process in polycrystalline materials and on their subsequent behaviour are highly variable.
At greater amount of wet GB's in stressed materials, a further percolation transition can occur: continuous solid framework would disappear, implying a dramatic increase in deformability.
Results obtained on the system NaCl /water seem to be promising, and their extending to other materials will be subject for future work.
Skvortsova: Colloid Journal Vol. 59 (1997), p. 827 [7] V.
Barrallier: Material Science Forum Vol. 373 (2002), p. 404 [11] J.L.

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.

Construction of a Generalized Fatigue Diagram of Metallic Materials O.V.
Materials and Methods of Tests The samples of pure titanium VT1-0 in a various structural state were made in the laboratory of nanostructured biocomposites of the Institute of Strength Physics and Materials Science at the installation equal channel angular pressing (ECAP) at the all-round pressing plant with subsequent rolling.
Ramasubbu, Stages of deformation of polycrystalline materials.
Diagnostics of materials. 10 (2009) 51-57
Moscow, Science. 1984

Materials and Methods Instruments: a Shimadzu TOC-VCPH determinator (Japan); a Shimadzu UV-1700 ultraviolet spectrophotometer (Japan); a Amicon 8400(Millipore corp, MA) with effective volume 400ml and effective filter surface 4. 18×10-3 m2; Materials: six types of regenerated cellulose ultrafiltration membranes(Millipore, φ=76mm): 100kDa (which has a nominal molecular weight cut-off=100 kDa), 30, 10, 5, 3 and 1kDa.
Wang, eta.l: Chinese Journal of Environmental Science Vol. 20 (1999) No.1, p. 43.
Wei, Journal of Harbin Institute of Technology Vol. 40 (2008) No.8, p.1208.
Xi, eta.l: Environmental science Vol. 32 (2011) No.6, p.1687.
Zhao, eta.l: Journal of Beijing University of Technology Vol. 32 (2006) No.12, p.1062.

Test materials and Aggregate gradation Material selection.
Webster: Journal of Transportation Engineering, (2002) No.9, p.9
Zhang and et al: Journal of Xi´an Highway University, Vol. 18 (1998) No.3, p.235
(Urban Science Edition), Vol.26 (2009) No.2, p.5
Li and et al: Journal of Wuhan University of Technology, Vol. 29 (2007) No.9, p.5

Thompson, Journal of Materials Science. 35 (2000) 6285-6292
Ribeiro, Journal of Materials Processing Technology. 147 (2004) 336-342
Hebsur, Materials Science and Engineering A. 261 (1999) 300-303
Kurama, Materials at High Temperatures. 26 2 (2009) 145-151
Chen, Journal of Materials Science. 39 (2004) 4855-4860

Nanoparticles (NPs) are (1-100) nm-sized materials.
Iraqi Journal of Science, 64 (12) (2023) 6135-6147
Iraqi Journal of Science, 62 (8) (2021) 2543-2554
International journal of molecular sciences, 17(9) (2016) 1-34
Journal of the Chinese Advanced Materials Society, 3(4) (2015) 270-279

Many researchers have studied the impact response of hybrid composite structure and materials [1-2].
Materials The woven E-glass fibers, a liquid diglycidyl ether of bisphenol A (DGEBA), amine curing agent and imidazole catalyst were supplied by Sigma Aldrich.
Impact energy of hybrid composites at perforation energy In the case of brittle composite materials (Neat Ep, GF1-Ep, GF2-Ep, GF3-Ep, and GF4-Ep), there is very little or no plastic deformation[8].
Acknowledgement The authors would like to thank all members at PoCRE laboratory especially Mohd Faizal and Institute of Science (IOS) for the materials and testing facilities.
Huang: Journal of Polym.