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Effect of heating-rate on failure temperature of pre-loaded brass H62 CHEN Bin(陈斌), PENG Xiang-he(彭向和), FAN Jing-hong(范镜泓), SUN Shi-tao(孙士涛) College of Resource and Environment Science...; Abstract: The response and failure of brass H62......
Effect of heating-rate on failure temperature of pre-loaded magnesium alloy LUO Ji(罗 吉)1, 2, CHEN Bin(陈 斌)1, 2, YUAN Quan(袁 权)1, 2, ZHANG Ding-fei(张丁非)3, QUAN Guo-zheng(权国政)3 1. College... 2010 Abstract: The response and failure of magnesium alloy AZ31 specimens subjected to different pre-loaded-stress levels and heating rates were investigated with a Gleeble-1500 thermo......
were captured with the pneumatic device. Gradient function was adopted to evaluate image definition. The results show that without the pneumatic device, the phenomenon of image dithering and blurring... of precision alignment. The gradient function value of these images becomes bigger and the image blurring is eliminated after using the pneumatic device. Key words: thermosonic flip-chip bonding......
Roof collapse of shallow tunnels with limit analysis methodYANG Xiao-li(杨小礼), LONG Ze-xiang(龙泽祥) (School of Civil Engineering, Central South University, Changsha 410075, China)Abstract:A new failure mechanism is proposed to analyze the roof collapse based on nonlinear failure criterion. Limit analysis approach and variational principle are used to obtain analytical findings concerning......
Simulation analysis on three-dimensional slope failure under different conditions ZHANG Ke1, CAO Ping1, LIU Zi-yao1, HU Hui-hua2, GONG Dao-ping2 1. School of Resources and Safety Engineering...: The failure mechanism of two-dimensional (2D) and three-dimensional (3D) slopes were investigated by using the strength reduction method. An extensive study of 3D effect was conducted with respect......
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, is a function of load, geometry and crack size, it is more appropriate to have a relationship between the stress intensity factor at failure (Kmax) and the failure stress (σf) from the fracture data... surface cracked tensile plates made of 2219-T87 Al alloy at cryogenic temperatures were correlated using a modified inherent flaw model. Fracture parameters to generate the failure assessment diagram......
of the failure surface function projected in the x-z plane was deduced through the variation method. The failure surface satisfied boundary conditions was obtained by the difference theorem. Further... bound punching failure analysis of circular foundation overlying a cave in Karst area based on the Hoek-Brown failure criterion LI Liang1, ZENG Zhonglin1, WANG Zhibin2, LI Taoyu1 (1. School of Civil......
of distribution algorithm (EDA); function optimization; parameter estimation Alopex[1-3](Algorithm of pattern extraction)算法首先于1974年被提出,用于确定视觉感受野形状,后来用来解决一些组合优化和模式匹配问题.该算法具有较强的局部精细搜索能力和较高的精度.将自变量的变化对函数值的影响作为启...AEA算法大幅度减小,算法的效率明显提高.在较为简单的函数寻优中,新算法只需几十次迭代就达到预定的精度,可见收敛速度较快.特别是对于寻优难度较大的Rosenbrock’s Function(即新算法f3),在表3中显示3种算法在 1 000次迭代中均没有收敛到设定值.在表4中,新算法在100次计算中有18次达到了预定精度;表5中,新算法在100次计算中均到达了设定的精度.而......
compression. Key words: seafloor massive sulfide; constitutive model; failure characteristics; damage; uniaxial strain; triaxial strain 1 Introduction Seafloor massive sulfide is following manganese... localization condition for high porosity sandstone. MENG et al [9, 10] had studied mechanism of rock deformation and failure and monitoring analysis in water-rich soft rock roadway. KHALEDI et al [11] had......