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The system includes function generator (33220A), power amplifier (AG1016), materials testing system (MTS810), high-energy low-pass filter, attenuator, sensor, oscilloscope, computers, specimens and fixture.
overall increase apparently with the fatigue cycles increasing, which demonstrates the Rayleigh wave nonlinearity parameters are sensitive for the changes of microscopic defects in the materials internal.
Acknowledgments We would like to acknowledge the support of the National Natural Science Foundation of China (10802027).
Journal of the Acoustic Society of America, Vol. 120 (2006), p. 1266
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Strength concept of orthogonal anisotropic masonry l Masonry strength characteristics based on orthogonal anisotropic material Masonry materials have different intensity (as shown in table 1) by stretching and compressing, which can be determined by multidirectional single axis test.
The quadratic multinomial of orthotropic materials in one plane stress state is as bellow: (12) Because of the positive or negative shear stress does not affect the failure of the material, it can take ,and the eq. (12) can be simplified as bellow: (13) Where have six strength parameters, five of which can be made by single axis strength test
It needs to make same corresponding modification when it is applied to anisotropic obvious masonry materials Substituted the Page date o into eq. (10),the follow eq.(20) can be obtained
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Introduction Microcapsulation is a novel technique in which some natural or synthetical macromolecule materials serve as wall materials of microcapsules, encapsule some materials such as solid/liquid food/drug or chemical raw materials, and ultimately be made into the micro or nano particles.
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Microstructure and Properties of Welding Joints of 7A52 aluminium alloy by the Friction Stir Welding Donggao Chen1,2,a, Jinhe Liu1,b, Zhihua Ma2,c, Chen Ye2,d, Wen Liu2,e 1Northwestern Polytechnical University, school of materials science and engineering, ShanXi Xi︐an, 710072, China. 2Ningbo Branch of China Academy of Ordance Science,Zhejiang Ningbo, 315103,China.
Experiment materials and experiment methods Experiment materials.The welding material used in this test is 30mm thickness 7A52 aluminum alloy, test plate size is 300mm × 150mm, chemical composition is shown in the table 1.
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Materials and experimental methods The 55vol.% TiB2P/2024Al composite was fabricated by Squeeze Casting patent technology.
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The material of this part is brass.
XNBS1025) and the National Natural Science Foundation of China (No.11272188, No.60873080).
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The use of the low-cost photocatalyst and the possibility of its activating with solar light offer economically reasonable and environmentally friendly solutions to the disinfection process, development of self-cleaning materials and the protection of technical materials from biodeteriorating microorganisms [19].
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This system could be expressed in functional expression as follows: (1) Explain: indicate the tensile strength of Small diameter cold-rolled reinforced bar; indicate the tensile strength of raw materials; indicate the reduction of area; indicate the speed of cold-rolling; indicate the coefficient of extension; indicate the parameter related to materials.
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