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the accuracy of mathematical model. Two kinds of filling methods were investigated and the results show that the bottom filling is better than the top filling that can achieve stable filling and reduce defects. Key words: titanium alloy; vertical centrifugal casting; hydraulic simulation; numerical simulation; top filling; bottom filling 1 Introduction Titanium alloys possesses a high......
. Fig. 1 Experiment model of rock filling embankment (Unit:mm): (a) Cross section; (b) Side view; (c) Top view Table 1 Main parameters of model experiment 2.2.2 Exciter machines Two kinds...J. Cent. South Univ. Technol. (2009) 16: 1034-1038 DOI: 10.1007/s11771-009-0171-7 Vibration compaction characteristics of rock filling embankment YANG Ming-hui(杨明辉), LIU Guang-xuan(刘广轩), ZHAO......
J. Cent. South Univ. Technol. (2007)06-0858-06 DOI: 10.1007/s11771-007-0163-4 Buckling analysis of super-long rock-socketed filling piles in soft soil area by element free Galerkin... stability of super-long rock-socketed filling piles widely used in bridge engineering in soft soil area such as Dongting Lake, the second stability type was adopted instead of traditional first type......
that the rheo-filling process is stable and the flowing front of the slurry shows a parabolic shape when the slurry starts to fill. When the slurry touches the in-gate top, the slurry spreads out steadily... Numerical simulation on rheo-diecasting mould filling of semi-solid key-shaped component BAI Yue-long(白月龙)1, 2, MAO Wei-min(毛卫民)1, XU Jun(徐 骏)2,XU Hong(徐 宏)3, HOU Hua(侯 华)3 1. School of Materials......
J. Cent. South Univ. (2018) 25: 2910-2928 DOI: https://doi.org/10.1007/s11771-018-3962-x Sedimentary system characteristics and depositional filling model of Upper Permian–Lower Triassic in South... base-level cycles (MC1–MC5). On this basis, the Permian–Triassic sedimentary systems and their filling model were analyzed in accordance with the change of base-level cycle and transition......
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Filling and solidification of TiAl melt in centrifugal field SHENG Wen-bin(盛文斌) Department of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China Received 10 April 2006... to describe the filling and solidification of TiAl melt by permanent mold centrifugal casting. The model was solved numerically and the filling and solidification processes in the centrifugal field were......
填沉降比,避免出现非胶结充填体顶水高度超过安全高度值,威胁充填挡墙的安全. 图2 非胶结充填体顶水高度随充填沉降比变化规律 Fig. 2 Backfilling of cementing filling body top water level changing with filling subsidence ratio 3.2 非胶结充填体顶水高度随充填挡墙...载的变化规律如图3所示. 图3 非胶结充填体顶水高度随充填挡墙作用荷载的变化规律 Fig. 3 Backfilling of cementing filling body top water level changing with filling retaining wall load 从图3可知,在充填挡墙尺寸,充填体浓度,胶结充填体高度一定的前提下,充填沉降比不变时......
Numerical simulation for thermal flow filling process of casting CHEN Ye(陈 晔)1, ZHAO Yu-hong(赵宇宏)2, HOU Hua(侯 华)1 1. College of Materials Science and Engineering, North University of China... algorithm (SOLA) method was used to solve the velocity and pressure field of the thermal flow filling process, and the volume of fluid (VOF) method for the free surface problem. Since the "donor-acceptor......
and Technology Beijing, Beijing 100083, China)Abstract:To reduce the difficulty of material filling into the top region of tooth in hot precision forging of gears using the alternative die designs, relief-cavity designs in different sizes were performed on the top of die tooth. The influences of the conventional process and relief-cavity designs on corner filling, workpiece stress, die stress......