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of carbon steel/Al-alloy bi-layered tubes with different thickness ratios and internal pressures. Two types of instabilities, namely the bifurcation instability of inner tube and the limit load instability of outer tube are noticed and examined. It is indicated that the onsets of the wrinkling of inner and outer tube are delayed with increasing the thickness ratio. The bending capacity......
Superplasticity and superplastic instability of AZ31B magnesium alloy sheet WANG Ling-yun(汪凌云)1, SONG Mei-juan(宋美娟)1, 2, LIU Rao-chuan(刘饶川)2 1.College of Materials Science and Engineering...: AZ31B magnesium alloy; superplasticity; superplastic instability; strain sensitivity; cavity evolution; damage
and failure features of goaf surrounding rock under different spans D and column thickness d were carried out by FLAC3D software. Using FISH language to define Mohr-Coulomb criterion for rock shear failure, zone’s shear failure criterion and other key parameters in the course of calculation can be monitored. Lastly, according to the research results, reasonable process parameters for mining design......
J. Cent. South Univ. (2020) 27: 3807-3820 DOI: https://doi.org/10.1007/s11771-020-4563-z Unified strength model based on the Hoek-Brown failure criterion for fibre-reinforced polymer-confined pre... by regression analysis of experimental data; however, in this article, a new unified strength model is proposed using the Hoek-Brown failure criterion. To study the strength of FRP-confined damaged......
J. Cent. South Univ. (2018) 25: 1966-1975 DOI: https://doi.org/10.1007/s11771-018-3887-4 Effects of different numerical algorithms on simulation of chemical dissolution-front instability in fluid... instability problem in fluid-saturated porous rocks is no exception. Since this kind of instability problem has both the conventional (i.e. trivial) and the unconventional (i.e. nontrivial) solutions......
J. Cent. South Univ. (2017) 24: 720-725 DOI: 10.1007/s11771-017-3473-1 Effects of porosity heterogeneity on chemical dissolution-front instability in fluid-saturated rocks ZHAO Chong-bin(赵崇斌)1... characteristics of the porosity field. The main purpose of this work is to investigate the effects of porosity heterogeneity on chemical dissolution front instability in fluid-saturated rocks......
Onset and Direction of Shear Banding Instability in Metallic GlassesYan Chen,Lanhong DaiState Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences摘 要:The shear banding instability occurs as the homogenous deformation in metallic glasses(MGs) develops to a critical point, at which the discontinuity in deformation......
A Novel Criterion of Mixing Time in Gas-Stirred Ladle SystemsJun Zhang22. School of Metallurgy and Resource, Anhui University of Technology摘 要:A novel criterion of mixing time in gas-stirred ladle systems was proposed in this paper. The essential difference between the previous criterion and the present one is that the former is based......
J. Cent. South Univ. (2021) 28: 1448-1458 DOI: https://doi.org/10.1007/s11771-021-4708-8 A new nonlinear empirical strength criterion for rocks under conventional triaxial compression XIE Shi-jie(谢... University of Technology, Hefei 230009, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: The failure criterion of rocks is a critical factor......
to evaluate the microstructural transformations and instability phenomena. The material investigated was deformed by compression in the temperature and strain rate ranges of 300-500 ℃ and 0.001-1.0 s-1, respectively. The deformation efficiency was calculated by strain rate sensitivity (m) values obtained by hot compression tests. The power dissipation efficiency and instability parameters were......