Papers by Author: Bin Wang

Abstract: This paper briefly analyses the routing establishing process of AODV and points out its imperfection, proposes the AODV routing establishing principle based on SNR. The Network delay and data throughput of the improved AODV have all been improved as simulation results proves. Finally the conclusion was given, illustrating that the improvement avoids the bad influence to the transmission rate of the whole link, which brings by low SNR node, and increases the data transmission efficiency.

Abstract: A structural failure model is presented for the rock mass with a discontinuous weak structural plane. The present model takes into account the effect of weakening of both deformation and strength parameters. And it can degenerates into classical Mohr-Coulomb model or Jaeger model according to corresponding conditions. The numerical tests by Particle Flow Code demonstrate that the capability and performance of the proposed model in capturing behaviors of the mass rock.

Abstract: The Mg-Zn-Zr alloy ZK60 with added trace rare-earth elements Y(0.9wt%) and Ce(0.9wt%) were prepared. After hot extrusion and aging treatment, the tensile mechanical properties of the alloys were tested at room temperature. Microstructures of the alloys were investigated by optical microscope (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The existing form, affecting mechanisms of trace Y and Ce in alloys and the effects on the microstructures and mechanical properties of ZK60 alloy were discussed. The results showed that: trace rare-earth elements Y and Ce both had remarkable grain-refining effects on the alloys, while the grain-refining effect of Y was more significant than that of Ce. RE elements Y and Ce improved the mechanical properties of the ZK60 alloy, but the strengthening effect of Y was more remarkable. It was found that σb of Mg-Zn-Zr-Y alloy was improved by 12.6％. Addition of Ce to the ZK60 alloy led to an increase in ductility of the alloy from 15% to 17%.

Abstract: It has been investigated that the influence of processing parameters on mechanical properties of weld zone for Ti-24Al-15Nb-1.5Mo and TC4 dual alloy welded by electron beam in vacuum. The results shows the remarkable influence factors are heat treatment regime and deformation for yield strength of welded dual alloy samples at room temperature tensile test, and the remarkable influence factor is forging temperature for the elongation in tensile test at 500°C. From the combined analysis about other properties at room temperature and 500°C, the microstructure of the weld seam, it can been gotten the optimum parameters of processing dual alloy, i.e. forging at 1020°C, soaking for 12 hour at 700°C, air cooling, about 40% deformation and using billet of rolling state.