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| 1 | A STUDY ON THE EFFECT OF RADIAL INERTIA ON THE ELASTO-PLASTIC COMBINED STRESS WAVE PROPAGATION IN THIN-WALLED TUBES显示文摘An in-depth analysis of propagation characteristics of elasto-plastic combined stress waves in circular thin-walled tubes has been made. In obtaining the simple-wave solution, however,most researches have ignored the influence of the circumferential stressrelated to the radial inertial effect in the tubes. In this paper the incremental elasto-plastic constitutive relations which are convenient for dynamic numerical analysis are adopted, and the finite-difference method is used to study the evolution and propagation of elasto-plastic combined stress waves in a thin-walled tube with the radial inertial effect of the tube considered. The calculation results are compared with those obtained when the radial inertial effect is not considered. The calculation results show that the radial inertial effect of a tube has a fairly great influence on the propagation of elasto-plastic combined stress waves. | Li Yongchi Huang Chengyi Yuan Fuping Jin Yongmei | 2001 | Acta Mechanica Solida Sinica2001，14，1： | 2 |
| 2 | Viscoplastic Damage-Softening Constitutive Model for Concrete Subjected to Uniaxial Dynamic Compression显示文摘A new viscoplastic damage-softening constitutive model is presented. It is developed by integrating a Bodner-Partom viscoplastic model with a newdamage evolution equation. A set of ordinary differential equations( ODEs) is formulated,and a Runge-Kutta integral method is used to get stress-strain curves given by the model. Also,stress-strain curves of a wide range of strain-rates for concrete were obtained by split Hopkinson pressure bar( SHPB) tests. By fitting the integral stressstrain curves to the experimental ones with the least square optimization method,we determined the material parameters in our model. Some properties of the newmodel,such as strain-rate sensitivity,damage evolution characteristics,strain-rate jump effects and unloading feature,are explored.These results showthat our new model can describe dynamic behaviors of concrete very well,and our integrating-fitting-optimizing method to get material parameters is valid. | Xiaowang Sun Yongchi Li Ruiyuan Huang Zhongbao Ye Kai Zhao | 2017 | Journal of Beijing Institute of Technology2017，26，4： | 2 |
| 3 | Correction of soil parameters in calculation of embankment settlement using a BP network back-analysis model 显示文摘 | Wang Zhiliang Li Yongchi Shen R F | 2007 | Engineering Geology2007，，16： | 1 |
| 4 | Model study of borehole stability显示文摘 | Wang Xiaojun Guo Yong Li Yongchi | 1994 | Drilling Technology1994，6977，： | 1 |
| 5 | Correction of soil parameters in calculation of embankment settlement using a BP network back-analysis model 显示文摘 | WANG Zhiliang LI Yongchi Shen R F | 2007 | Engineering Geology2007，91，2： | 1 |
| 6 | DYNAMIC BUCKLING OF STATICALLY PRELOADED RING-STIFFENED CYLINDRICAL SHELLS UNDER AXIAL FLUID-SOLID IMPACT LOADING显示文摘The Initial Imperfection Amplified Criterion is applied to investigate the geometric nonlineardynamic buckling of statically preloaded ring-stiffened cylindrical shells under axial fluid-solid impact.Tak-ing account of the effects of large deformation and initial geometric imperfection,the governing equations areobtained by the Galerkin method and solved by the Runge-Kutta method.The effects of static preloading(uniform external radial pressure)on the buckling features and the load-carrying ability of ring-stiffened cy-lindrical shells against axial impact are discussed. | Jiang Songqing Li Yongchi Hu Xiuzhang Zheng Jijia | 2000 | Acta Mechanica Solida Sinica2000，13，3： | 1 |
| 7 | Correction of soil parameters in calculation of embankment settlement using a BP network back-analysis model 显示文摘 | Wang Zhiliang Li Yongchi Shen R F | 2007 | Engineering Geology2007，，24： | 1 |
| 8 | Numerical simulation of tensile damage and blast crater in brittle rock due to underground explosion显示文摘 | WANG Zhiliang LI Yongchi SHEN Ruifu | 2007 | International Journal of Rock Mechanics & Mining Sciences2007，44，5： | 1 |
| 9 | A method for evaluating dynamic tensile damage of rock显示文摘 | Zhiliang Wang Yongchi Li J.G. Wang | 2008 | Engineering Fracture Mechanics2008，，10： | 1 |
| 10 | Numerical A- nalysis of the Spallation of Steel Target under Explosive Ladin显示文摘 | CHU Chaohsiang LI Yongchi WANG Xiao-jun | 1981 | Applied Mathematics and Mechnics1981，2，4： | 1 |
| 11 | Numerical analysis of blast- induced wave propagation and spalling damage in a rock plate显示文摘 | Wang Zhiliang Li Yongchi Wang J G | 2008 | In- ternational Journal of Rock Mechanics and Mining Sciences2008，45，： | 1 |
| 12 | Determination of thedamage evolution equation and spallation criterion of metals显示文摘 | LI Yongchi TAN Fuli GUO Yang | 2003 | Journal of Ningbo Univesity2003，16，4： | 1 |
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