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Parameter identification of inertially stabilized platforms using current command designLI Zhi-qiang(黎志强), ZHANG Zhi-yong(张智永), ZHOU Qing-kun(周擎坤), FAN Da-peng(范大鹏)(College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China)Abstract:Accurate parameter identification is essential when designing controllers for inertially stabilized......
for strain-softening rock based on normal distribution and its parameter determination CAO Wen-gui(曹文贵), LI Xiang(李 翔), ZHAO Heng(赵 衡) (Institute of Geotechnical Engineering, Hunan... parameters of statistical damage constitutive model, the model parameters were mostly determined with regression for the stress-strain curve by rock tri-axial test in the past. Obviously, some deficiencies......
Identification of nucleation parameter for cellular automaton model of dynamic recrystallization JIN Zhao-yang(金朝阳)1, 2, LIU Juan(刘 娟)1, CUI Zhen-shan(崔振山)1, WEI Dong-lai(韦东来)1 1. National Die...; Abstract: The accuracy of nucleation parameter is a critical factor in the simulation of microstructural evolution during dynamic recrystallization (DRX). Based on the flow stress curve under hot......
J. Cent. South Univ. Technol. (2008) 15(s1): 424-428 DOI: 10.1007/s11771-008-392-1 Optimization of rheological parameter for micro-bubble drilling fluids by multiple regression experimental... Introduction At present, orthogonal experimental design and uniform design are mainly applied to optimizing oil and gas wells drilling fluids. Orthogonal test possesses many advantages......
J. Cent. South Univ. (2018) 25: 3085-3097 DOI: https://doi.org/10.1007/s11771-018-3976-4 Physical simulation test of soil-rock mixture from synthetic transparent soil DING Xiao-hua(丁小华)1, 2, ZHOU... is mixed with liquid paraffin and n-tridecane at a mass ratio of 4.4 at room temperature of 17℃. Physical and mechanical properties of transparent soil are determined by physical test and compared......
of microstructure evolution inside the shear band in biaxial compression test [J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2011, 35(6): 652-667. [12] PIETRUSZCZAK S... of shear banding in the direct shear test [J]. Géotechnique, 2007, 57(6): 513-526. [21] ZHOU Q, HELENBROOK B T, SHEN H H. A computational study of the micromechanics under pre- and post- failure in a 2-D......
Simulation of polycrystalline aluminum tensile test with crystal plasticity finite element method SI Liang-ying(司良英)1, 2, L? Cheng(吕 程)2, K. Tieu2, LIU Xiang-hua(刘相华)1 1. State Key Laboratory... was used to generate the virtual polycrystalline microstructure. The effect of grain size and necking during the tensile test has been analyzed. 2 Theory of crystal plasticity 2.1 Kinematics of crystalline......
by compression test at 533-773K and initial strain rate of 0.002-2s-1 to a true strain of 1.0 followed by water quench. Polarized optical microscopy and transmission electron microscopy were applied to observe...%), occurs when Zenner-Hollomon parameter(Z parameter) is low, but the true stress-strain curve doesnt accompany stress oscillation. Continuous dynamic recrystallization occurs when Z parameter......
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