State Key Laboratory of High Performance Complicated Manufacturing

Laboratory of, China

State Key Laboratory of High Performance Complicated Manufacturing

Laboratory of, China

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Li X.-H.,State Key Laboratory of High Performance Complicated Manufacturing | Li X.-H.,Central South University | Yan Y.-S.,State Key Laboratory of High Performance Complicated Manufacturing | Yan Y.-S.,Central South University | And 4 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2011

The effect of filler wire, plate thickness and annealing process on the microstructure and properties of nickel based alloy (C-276) welding line were investigated. Results show that during autogenous welding, with the increase of thickness, the grain size within the welding seam area increase by 2 μm in proper order with the metallographic structure become more even and distribute along certain direction. The precipitation phase move from welding area to heat affected zone; the tensile strength of the welding seam being lower than that of matrix; the shape of fracture being irregular; all fractures show trace of plastic deformation; the highest hardness appears at the heat affected zone. There was no obvious corresponding relation between the corrosion resistance and the thickness of the welding plate. After filler wire, the metallographic structure distribute orderly; the shape being regular; a large number of precipitation phase being produced; the grain size increase by 5 μm~10 μm; the tensile strength in welding zone decreases; the hardness in welding zone being higher than that in heat-affected zone; the corrosion resistance being better than that at autogenous welding. After solution annealing, the precipitated phase decrease; the grain being coarsened and recrystallized; the recrystallized grain size decrease by 2 μm in welding zone and increase by 15 μm~20 μm in heat-affected zone than that before recrystallization; the tensile strength in welding zone decreases while the corrosion resistance increases significantly.


Li J.P.,Central South University | Li J.P.,State Key Laboratory of High Performance Complicated Manufacturing | Tan P.,Central South University | Tan P.,State Key Laboratory of High Performance Complicated Manufacturing | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

During the construction of high speed railway box girder, the interior formwork's floating problem is always been a big common quality fault plagued the construction in the process of concrete pouring, this leads to the roof thickness of box girder arising, the harm is great. This paper combined the construction project of Hebang single linear 32 meter interior formwork, according to the actual condition of the construction, proceeding the simulation analysis and experimental study of floating date on box girder interior formwork. Using the solidworks2010 establish the mode of box girder interior formwork, then, import the mode to the workbench14.5 proceeding simulation analysis. The simulation analysis of interior formwork maximal floating date is 10.67 millimeter, while the measured date is 10.63 millimeter, the deviation is 3.2%. The result manifests the feasibility of the simulation analysis of interior formwork floating date, this provide a reference to the structure optimization of the interior formwork used in the high speed railway. © (2014) Trans Tech Publications, Switzerland.


Li J.P.,Central South University | Li J.P.,State Key Laboratory of High Performance Complicated Manufacturing | Huang J.,Central South University | Huang J.,State Key Laboratory of High Performance Complicated Manufacturing | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

In the high speed railway box girder construction,for the web is narrow and with a lot of rebar,and furnished with prestressed channels,insert-type Vibrators alone can not fully guarantee compacting concrete. It is easy to cause the phenomenon such as honeycomb, pitting,surface hole,seriously affect the quality of construction,The plate type vibrator is commonly used for auxiliary vibration at the construction site. This paper combined the construction project of Hebang single linear 32 meter side formwork,according to the actual situation of the construction, the use of the plate type vibrator are analyzed in the simulation.Using the solidwork2010 established a high speed railway box girder side formwork model,then import the model into workbench 14.5 to do the analysis.Simulation values comply with the relevant standards,provides theoretical support for the plate type vibrator system for use in high speed box girder beams construction. © (2014) Trans Tech Publications, Switzerland.


Hu S.C.,Central South University | Hu S.C.,State Key Laboratory of High Performance Complicated Manufacturing | Ouyang S.,Central South University | Ouyang S.,State Key Laboratory of High Performance Complicated Manufacturing | And 3 more authors.
Advanced Materials Research | Year: 2014

In order to investigate the electromechanical coupling dynamic behaviors of portal crane's hoisting system, the electromechanical coupling model of the system was established by utilizing Lagrange-Maxwell equation. Taking the MQ2535 portal crane as an example, the electromechanical coupling dynamic characteristic curves of the hoisting system was studied based on the MATLAB simulation platform, in addition that the interrelate and interactive characteristics between the electromagnetic system and mechanical system was presented. It is shown that the results have larger difference compared with the results of neglecting the electromechanical coupling effects. This is because of the energy-stored role of the electromagnetic system and the load tracking property of the driving motor that the dynamic load got buffered and then the dynamic load factor became lower. The research results can provide theoretical supports for matching and optimizing the parameters of electromechanical system and improving the portal crane safety. © (2014) Trans Tech Publications, Switzerland.


Hu S.C.,Central South University | Hu S.C.,State Key Laboratory of High Performance Complicated Manufacturing | Zheng Y.F.,Central South University | Zheng Y.F.,State Key Laboratory of High Performance Complicated Manufacturing | And 2 more authors.
Advanced Materials Research | Year: 2013

This paper establishes finite element model of the spreader based on ANSYS, simulating its mechanical properties: static strength and modal vibration. Based on the calculation results, it points out the weaknesses of the spreader under more cases and its vibration characteristics, in addition, we also discuss the impacts on environment and human body from the perspective of ergonomics, which can provide theoretical basis for further fatigue life and dynamics research. © (2013) Trans Tech Publications, Switzerland.


Li J.P.,Central South University | Li J.P.,State Key Laboratory of High Performance Complicated Manufacturing | Ruan J.,Central South University | Ruan J.,State Key Laboratory of High Performance Complicated Manufacturing | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

Steel structure climbing formwork has been widely used in bridge pier and bridge tower, etc. But the design of 30 degrees slope climbing formwork design is rarely involved. The climbing formwork which in the upper surface of leaning bridge tower is affected by concrete buoyancy and the downside is affected by concrete gravity.That cause insufficient stiffness, deformation of the template, non-uniform cross-section of the bridge and large angle deviation which have great harm to the bridge quality.This paper which combined the construction project of Huaibei Xiangwang Bridge establish the mode of climbing formwork, then, import the mode to the Workbench14.5 proceeding simulation analysis. Getting the stress and deformation of the climbing formwork, check the strength and stiffness.Then optimize the structure of climbing formwork to ensure the stiffness and control the deformation of the template. The stress of downside climbing formwork after optimization is uniform and maximum stress is reduced about 30%.This paper provide a reference to the design of the climbing formwork used in the large angle leaning bridge tower. © (2014) Trans Tech Publications, Switzerland.


Hu S.C.,Central South University | Hu S.C.,State Key Laboratory of High Performance Complicated Manufacturing | Zou N.B.,Central South University | Zou N.B.,State Key Laboratory of High Performance Complicated Manufacturing | And 2 more authors.
Advanced Materials Research | Year: 2014

Given the importance of the jib system which has direct impact on the comprehensive performance of portal crane, this article regards the Jib system as a whole. Detailed finite element model of the jib system was established and vibration modes were calculated based on the finite element method. This paper conducted a transient dynamic simulation and obtained dynamic response to the boom structure in the process of lifting rated weight at the maximum amplitude position. This research approach is not only very useful to obtain dynamic response and assess the fatigue life of the jib system in the design phase, but also to provide a theoretical basis for the design of portal crane. © (2014) Trans Tech Publications, Switzerland.


Hu S.C.,Central South University | Hu S.C.,State Key Laboratory of High Performance Complicated Manufacturing | Liu B.,Central South University | Liu B.,State Key Laboratory of High Performance Complicated Manufacturing | And 2 more authors.
Advanced Materials Research | Year: 2014

Large span gantry crane girder structure has a direct effect on the performance of the whole machine. This paper, by using ANSYS, gets the distribution of the stress and deformation of the box girder under different working conditions, and verifies that the box girder structure can well meet the requirements of the mechanical properties. On this basis, it establishes the objective function and constraint conditions of box girder structure, and gets the best work parameters by using Matlab to optimize the structure. The results of structure optimization can guide well in the designing and manufacturing of similar products. © (2014) Trans Tech Publications, Switzerland.

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