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Thermal Vibration of Functionally Graded Circular Plates Lei WU and Liansheng MAa School of Sciences, Lanzhou University of Technology, Lanzhou, China a lsma@lut.cn Keywords: Functionally graded materials (FGM); Circular plate; Thermal vibration; Shooting method.
It is assumed that the mechanical and thermal properties of functionally graded materials vary continuously through the thickness of the plate and obey a simple power law related to the volume fraction of the constituents.
Introduction Due to the excellent property of functionally graded materials (FGM) to withstanding high temperature gradient environments, it is widely used in many important engineering structures, such as aerospace, nuclear reactors and chemical plants.
Acknowledgements This work was supported by the National Fundamental Science Foundation of China (10472039), the Natural Science Foundation of Gansu Province(ZS041-A25-007) and the Doctoral Foundation of Lanzhou University of Technology.
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Research on Lyapunov exponent of chaos feature in different stress stage of concrete joint system Song Jun-wei Jiangxi bluesky university, Nanchang 330098,China sjw77@tom.com Keywords: Lyapunov exponent; concrete materials; features of stages; dynamics; stability criterion Abstract: According to the research on whole curves of strain-stress of concrete materials, the paper illustrates in evidence features of stages and shows that the discrete feature of curve often occurs in strain-softening stage.
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Materials and methods Materials The experimental materials were purchased from Ya’an.
The Mass of Mixing Material (x2): the total mass of materials which were mixed when the test was applied.
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Weld pool and keyhole detection based on visual sensors in plasma arc welding Ren Wenjian 1, a, Liu Xinfeng 1,b and Gao Jinqiang1,c 1 MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, and Institute of Materials Joining, Shandong University, Jinan 250061, China arwjsuccess@126.com, bliuxinfengabc@163.com, cjqg@sdu.edu.cn Keywords: Plasma Arc Welding, Visual Sensor, Keyhole, Weld Pool Abstract.
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Kurzydlowski1 1 Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, Warsaw 02-507, Poland 2 The Open University, Department of Materials Engineering, Walton Hall, Milton Keynes MK7 6AA, United Kingdom 3 The University of Manchester, Materials Performance Centre, Sackville Street Campus Manchester M60 1QD, United Kingdom Keywords: Digital Image Correlation, micro samples, mechanical properties, life assessment, pressure vessel steels.
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Introduction So far, the most widely used construction materials in civil engineering is still steel and concrete, the effective combination of the two materials can play the advantages of them, but there is also a very serious problem, that is steel corrosion.
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