5篇
您的检索式：作者名="ZHONG Yuguo"
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| 1 | Fracture Behavior and Processing Deformation of C71500 Cupronickel Alloy during Hot Tensile Deformation显示文摘The hot tensile deformation properties and microstructure evolution of high purity C71500 cupronickel alloy at 1023-1273 K and 0.0001-0.1 s^(-1)strain rates were studied by uniaxial hot tensile deformation method.Based on the experimental data,the flow behavior,microstructure and fracture characteristics of the alloy were analyzed after considering the influence of different deformation parameters.The relationship between microstructure and high temperature(T≥1023 K)plasticity is discussed,and the fracture mechanism is revealed.The relationship between strain rate sensitivity coefficient and stress index and plastic deformation is discussed.The constitutive equation of the alloy is established by Johnson-Cook model.Based on the dynamic material model,the energy dissipation model is established,and Prasad’s instability criterion based on Ziegler’s expected rheological theory is used to predict the unstable region in the processing map.Processing map in hot tensile is analyzed to provide theoretical basis for different processing technology. | 高鑫 武会宾 LIU Ming ZHANG Yuanxiang ZHOU Xiangdong ZHONG Yuguo | 2021 | Journal of Wuhan University of Technology(Materials Science)2021，36，3： | 1 |
| 2 | Barium Titanate Prepared by Stearic Acid-Gel Method显示文摘Stearic acid-gel method was used to prepare barium titanate.All the samples show a cubic perovskite structure and thus no ferroelectricity is detected at room temperature.X-ray diffraction reveals that the grains can hardly grow even firing at high temperature so that the grain size in most of the samples is below the ferroelectric critical size.A tentative explanation is proposed of the peculiarities based on the nonstoichiometry at the surface layer. | REN Tianling ZHANG Peilin WANG Yuguo ZHONG Weilie WANG Xiaohui XU Baokun | 1994 | Chinese Physics Letters1994，11，5： | 0 |
| 3 | Dynamic Analysis of Launch Vehicle Piping Systems显示文摘Due to complex assembly boundaries and working environment of the piping system in a launch vehicle,it is difficult to simulate realistic flight conditions on the ground.The lack of analysis on the complex environment and boundary conditions in the design process may lead to flight failures,even cause the fuel to combust and destroy the launch vehicle.This paper studies the technology and methods for dynamic simulation analysis of piping systems in launch vehicles,and established a dynamic simulation model of representative pipelines,which is expected to provide a basis for simulation analysis of piping system states in realistic flight. | WANG Shuai LI Chao ZHOU Yuguo ZHANG Xinyao YANG Dongsheng ZHONG Sheng | 2023 | Aerospace China2023，24，3： | 0 |
| 4 | Size Effect in Ferroelectric Long Cylinders显示文摘The Curie temperature and polarization in a ferroelectric cylinder with infinite length have been examined using Landau free energy expansion.The Curie temperature and polarization decrease with decreasing cylinder diameter for the positive extrapolation length,and reach zero at the critical size.For negative extrapolation length,both Curie temperature and polarization increase with decreasing cylinder diameter. | WANG Yuguo ZHANG Peilin WANG Chunlei ZHONG Weilie N.Napp D.R.Tilly | 1995 | Chinese Physics Letters1995，12，2： | 0 |
| 5 | Size and Temperature Dependence of Dielectric Constant of Ultrafine PbTiO_(3) Particles显示文摘Using sol-gel method,we prepared ferroelectric PbTiO_(3) fine particles with particle size covering the range 20-200nm;the dielectric properties of powder compact were studied in the present work.The room temperature dielectric constant increases with the decrease in particle size and reaches a maximum value at the size of about 40nm.The temperature dependence of dielectric constant involving the evolution of particle size during the measurement is discussed. | QU Baodong JIANG Bin WANG Yuguo ZHANG Peilin ZHONG Weilie | 1994 | Chinese Physics Letters1994，11，8： | 0 |
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