Taiyuan City Vocational College

Taiyuan, China

Taiyuan City Vocational College

Taiyuan, China
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Zhang J.-J.,North University of China | Zhang J.-J.,Taiyuan City Vocational College | Sun Y.-Y.,North University of China | Li D.-S.,Beihang University | And 4 more authors.
Journal of Physics D: Applied Physics | Year: 2015

Graphene-based polymer composite films have wide-ranging potential applications, such as in sensors, electromagnetic shielding, absorbing materials, corrosion resistance and so on. In addition, the practical applications of graphene-based polymer composite films are closely related to their mechanical properties. However, the mechanical properties of graphene-based polymer composite films are difficult to characterize with tensile tests. In this paper, the bugle test was used to investigate the mechanical properties of graphene-based polymer composite films. The experimental results show that the Young's modulus of polymer composite films increases non-linearly with an increase in the doping content of graphene, and viscoelastic deformation is induced under cyclic loading conditions. Moreover, in order to describe their mechanical behavior, an 'Arruda-Boyce' finite-strain constitutive model (modified BPA model), based on the strain amplification hypothesis, and a traditional 'Arruda-Boyce' model was proposed, which incorporated many of the features of previous theories. The numerical treatment of the modified BPA model associated with finite element analysis is also discussed. This new model is shown to be able to predict the experimentally observed mechanical behavior of graphene based polymer composite films measured by the bugle test effectively. © 2015 IOP Publishing Ltd.

Kou Z.-M.,Taiyuan University of Technology | Kou Z.-M.,Shanxi Province Mine Fluid Control Engineering Research Center | Wei X.-Y.,North University of China | Lian H.-Z.,Taiyuan City Vocational College
Meitan Xuebao/Journal of the China Coal Society | Year: 2012

Studied on hydraulic fluctuation principle, and set up hydraulic exciting system consisted of wave exciter and hydraulic cylinder so that the exciting principle was applied on simulation vibration screen to solve the present problems in inertia shock excitation. The system exciting principle is that hydraulic shock waves are periodically produced in pipeline by wave exciter forcing flat so as to drive piston and piston rod as well as loads fixedon it periodic motion, that is exporting vibration. The hydraulic exciting principle was applied on simulation vibration screen and test was conducted to study its controlled law in different working conditions and various parameters. The test results prove that the vibration screen's frequency is independently controlled by excitation frequency of wave exciter. And when its amplitude is defined, pressure is increasing with frequency improving. When its pressure is defined, its amplitude is decreasing with frequency improving.

Fan C.,Taiyuan University of Technology | Fan C.,Taiyuan City Vocational College | Zhang S.,Taiyuan University of Technology | Lu G.,Taiyuan University of Technology
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2010

Under strong earthquake the reinforced concrete (RC) ductile frame usually undergoes large plastic deformation. Most of kinetic energy rising from the earthquake is dissipated through plastic deformation. A little part is converted into elastic deformation energy. In view of this mechanism of energy transformation a new seismic design procedure for RC ductile frame is proposed in this paper. The design proceeds in two steps. The first step is to select a suitable collapse mechanism and then to transform it into a single degree-of-freedom system. The second one is to calculate the rigid-plastic spectrum according to the selected collapse mechanism, seismic fortification intensity and site class and to determine the seismic requirement. To illustrate the effectiveness, the method is applied to two example structures. One is a five-storey and the other is a nine-storey RC frame design. The results obtained are in good agreement with the ones by the non-linear time-history analysis. It is shown that the method proposed in this paper has advantages of clear notion, simple calculation and reliable accuracy. It can be used in seismic design for reinforced concrete structures.

Fan C.,Taiyuan City Vocational College | Ji H.,Shanxi University
2011 International Conference on Electric Technology and Civil Engineering, ICETCE 2011 - Proceedings | Year: 2011

In this paper finite element method program ANSYS is used to study difference between plastic displacements of structure under strong earthquake calculated using rigid-plastic model and calculated using elastic-plastic model. The results show that rigid-plastic model can be introduced to calculate the max plastic motion under strong earthquake. Motivated by this a rigid-plastic response spectrum is introduced, which provides an easy method to calculate the maximum plastic displacement of structure under strong earthquake. The procedure is formulated using a step by step format followed by an example. Results are compared with refined elastic-plastic Time-History Analysis and found to be extremely encouraging. © 2011 IEEE.

Fan C.,Taiyuan University of Technology | Fan C.,Taiyuan City Vocational College | Lu G.,Taiyuan University of Technology | Zhang S.,Taiyuan University of Technology
World Information on Earthquake Engineering | Year: 2011

A seismic plastic-damage analyses method for reinforced concrete frames is developed in this article, based on the classical plastic model and the continuum damage model. The Plastic-damage constitutive law is implemented into a beam model for framed structures, in which these are described by elastic beams and columns with two inelastic hinges at their ends. A damage index is useful in evaluating the state of structural members and a meaningful global damage index for whole structure are introduced. The method together with the member and global damage indices, are adequate for the computation of the limit load of reinforced concrete frames subjected to seismic actions. Examples of applications of the methodology to the non-linear analysis of reinforced concrete framed structures were finally given. The result indicates that the method has reliable accuracy.

Fan C.,Taiyuan City Vocational College | Fan C.,Taiyuan University of Technology | Zhang S.,Taiyuan University of Technology | Lu G.,Taiyuan University of Technology
Journal of Earthquake Engineering and Engineering Vibration | Year: 2013

Equivalent single-degree-of-freedom (ESDOF) systems for the first two modes are converted. Modal yield strength and ductility coefficients of the ESDOF system are determined and the distribution of hysteretic energy in each story is got by modal pushover analysis. The energy contribution of each mode is determined using energy spectra and the required amount of energy dissipation is estimated and used to design appropriate energy dissipation system. The application of the method is illustrated by an example of a nine-story steel frame with passive energy dissipation system design. The results from the proposed method agree with the results from the non-linear time-history analysis.

Tian X.-Y.,Taiyuan City Vocational College
2011 International Conference on Computer Science and Service System, CSSS 2011 - Proceedings | Year: 2011

After the computer-aided design (CAD) introduces the optimization design method, the design process not only continue to choose the design parameters, select the best design, but also speed up the design speed, shorten design cycle. Here the structure of a Overhead Traveling Crane (OTC) is studied, script file (SCR) parameteric drawing is performed with the result data by combined global search optimization algorithm as input parameters, and the parameterized design of mechanical structure are achieved. © 2011 IEEE.

Fan C.L.,Taiyuan City Vocational College | Ji H.,Taiyuan City Vocational College
Advanced Materials Research | Year: 2011

Displacement based seismic design of RC frame with friction damper is proposed in this paper based on the displacement shape of RC frame. and multi-degree-of-freedom system is transformed into an effective single-degree-of-freedom system. Based on equivalent linearization equivalent period is determined by using the elasto-plastic displacement response spectra, and then the structural members are designed. At the same time, target deformability of the frame and friction damper device is obtained by decomposing the structural storey drift. And the expected deformability of the structure can be guaranteed by appropriate the friction energy dissipation brace. This method could effectively control the seismic performance of the structure in earthquakes. © (2011) Trans Tech Publications.

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