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Featured researches published by Guiqin Li.


International Journal of Computer Integrated Manufacturing | 2016

Disassembly operations’ efficiency evaluation in a virtual environment

Chenggang Wang; Peter Mitrouchev; Guiqin Li; Lixin Lu

Disassembly operations play a very important role during the initial design phase of industrial products. The available disassembly evaluation methods today seldom make disassembly as the preferred end-of-life solution for the reuse of parts or components in an economically sustainable way for lower value products. In virtual environment (VE), for instance, a human model is often involved in a digital mock-up model for assembly/disassembly (A/D) evaluation. However, it has limited application areas because of the high cost investment. Focusing on the evaluation of disassembly operations in a VE, a method based on five new criteria – visibility of a part, disassembly angles, number of tools’ changes, path orientation changing, and sub-assembly stability – is proposed here. All five criteria are presented by automatically calculated dimensionless coefficients, thus allowing the evaluation of the complexity of disassembly sequences in a VE. For this purpose, a mixed virtual reality disassembly environment based on Python programming language has been developed, using Visualisation Toolkit and Open Dynamics Engine libraries. The results of the analysis and findings demonstrate the feasibility of the proposed approach thus providing significant assistance for the evaluation of disassembly sequences during Product Development Process.


International Journal of Production Research | 2012

Evaluation of the logistic model of the reconfigurable manufacturing system based on generalised stochastic Petri nets

Guiqin Li; P. Mitrouchev; Y. Wang; D. Brissaud; Lixin Lu

To reveal the influence on system performance by the logistic model of reconfigurable manufacturing system (RMS), the generalised stochastic Petri nets (GSPN) modular modelling approach is presented in this paper. It is based upon the characteristics of a bottleneck service. According to this approach, the bottleneck service in the production process is found first. By corresponding different resources in the service to different modules of the GSPN, the module is reconfigured. The analysis of the model using the Markov chain is hereby presented, as is the average utilisation factor of RMS. Following this, the production capacity of different products and the average productivity of reconfigurable manufacturing cells (RMCs) are discussed.


Journal of Polymer Research | 2017

Experimental investigation and modeling of the tension behavior of polypropylene at different temperature

Guiqin Li; Jun Wang; Jiemin Feng; Qing Guo; Junlong Zhou; Peter Mitrouchev

The mechanical behavior of polypropylene polymer was investigated under the effect of various temperatures. Mechanical properties of polymer were carried out through uniaxial tensile tests for low and high temperatures respectively. The results showed that both yield stress and the elastic modulus of the material decrease with the increase of temperature. Similarly, the post-yielding behavior of the material can be clearly observed at low temperature, and this behavior gradually disappears as the temperature increases. A phenomenological constitutive model is proposed in order to understand the mechanical behavior of polymer by combining the hyperbolic and multi-linear relationships. It is based on the experiments, and the proposed constitutive model is successfully validated by the excellent agreement between model prediction and experimental results.


International Workshop of Advanced Manufacturing and Automation | 2017

A Study on Material Properties of Sealed Rubber Cylinder for Compressible Packer

Lixin Lu; Yue Qian; Guiqin Li; Peter Mitrouchev

The stress–strain curve of the packer seal rubber cylinder material is obtained by uniaxial tensile test in this paper, and the material constants of the Yeoh model is fitted in Origin. During the test, two kinds of samples are tested, the side and intermediate cylinder, and two sets of figures are measured for each sample, totally four sets of data are obtained. By the fitting results of the side and middle cylinder are achieved by comparing the material constants for each sample respectively.


International Workshop of Advanced Manufacturing and Automation | 2017

The Effect of Temperature on Mechanical Properties of Polypropylene

Guiqin Li; Junjie Li; Jun Wang; Jiemin Feng; Qing Guo; Junlong Zhou; Peter Mitrouchev

The significant diversity exists among the mechanical properties of PP polymers in range from high temperature to low temperature. With the increasing application of PP polymers in the automobile industry, the mechanical properties of PP polymers which depending on temperature are extensively studied by a growing number of scholars. The presented study concentrates on determining the mechanical properties depending on temperature by the use of mathematical method. With the focus on automotive applications, the elasticity constants values have been determined in the range from −30 up to 110 ℃ using uniaxial tensile. Experimental results indicate that the elasticity present a dramatic decrease with the increase in temperature, Based on the experimental investigation and the theoretical research by domestic and foreign scholars. The properties like the elasticity are mathematically described depending on the temperature in different mathematical methods and the influence of temperature on elastic modulus was summarized.


International Workshop of Advanced Manufacturing and Automation | 2017

Effect of Pressure on Packer’s Sealing Performance

Lixin Lu; Lei Tang; Guiqin Li; Peter Mitrouchev

The sealing performance of packer under different setting pressure is studied in this paper, and the finite element analysis is carried out. Firstly, the finite model of packer is established by using ANSYS software. Different setting pressure are provided, which cause the compression change of packer rubber. The relationship between the setting pressure and the compression distance and the maximum contact stress of the packer rubber is found out by analyzing this change, including the gap between the rubber and the central pipe and the contact stress between the rubber and the inner wall of the casing. Finally, the observed phenomena and simulation data are analyzed and summarized, and the influence of the setting pressure on the sealing performance of the packer is obtained.


International Workshop of Advanced Manufacturing and Automation | 2017

Seal Property of Rubber Cylinder Shoulder in Packer

Lixin Lu; Tao Deng; Guiqin Li; Mitrouchev Peter

The end of the rubber cylinder will flow into the annular space between the central oil pipe and the casing and form, which cause shoulder protrusion. This appearance will cause stress concentration at the end of the rubber cylinder, which may cause the end of the rubber cylinder to be damaged. In order to solve the problem of the shoulder protruding of sealing cylinder of packer, a kind of shoulder protector is designed in this paper. The effect of the designed shoulder protector is verified by the high temperature and high pressure test.


International Workshop of Advanced Manufacturing and Automation | 2017

The Effect of Extensometers on the Mechanical Properties of the Polypropylene Under Uniaxial Tensile Loading

Guiqin Li; Hao Chen; Jun Wang; Jiemin Feng; Qing Guo; Junlong Zhou; Peter Mitrouchev

The elastic modulus and yield strain of polypropylene were obtained by the tensile test at different temperature. Compare the physical performance parameters which were obtained with or without using the extensimeter, a linear relationship between the two schemes is presented in this article. The coefficient of the linear relationship was calculated by the two sets of data which are obtained with or without using the extensimeter, and the presented linear fitting represents the results more accurate. It greatly reduces the difficulty and intensity of the experiment and provides a more convenient method for the performance testing and testing of high polymer in automobile manufacturing industry.


International Workshop of Advanced Manufacturing and Automation | 2017

Finite Element Analysis of Sealing Performance for Multi Cylinder Packer

Lixin Lu; Tao Deng; Guiqin Li; Peter Mitrouchev

Sealing performance of multi cylinder packer is analyzed by using finite element analysis method in this paper. The setting process is analyzed by apply different sealing load to the multi cylinder packer, and it is found that the different sealing load will cause the different gap between the rubber tube and the central tube in the packer. Thus, the position of the main seal in the multi cylinder packer is thus obtained.


international conference on advanced intelligent mechatronics | 2014

3D geometric removability analysis for virtual disassembly evaluation

Chenggang Wang; Peter Mitrouchev; Guiqin Li; Lixin Lu

In recent years, Virtual Reality interface has been wildly used to simulate various processes and in particular assembly/disassembly operations during the initial stage of product design. This paper deals with a method for 3D geometric removability analysis for disassembly operation evaluation. It is based on the visibility calculation of 3D Geometric and Removability Analysis. For this purpose three new parameters for evaluation are proposed. They are presented by dimensionless coefficients automatically calculated thus allowing evaluating disassembly sequences complexity in a virtual environment. The proposed method is tested and an example for disassembly operations of a mechanical assembly is presented. Results showed that the Removability is great different within different possible disassembly sequences.

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Chenggang Wang

Centre national de la recherche scientifique

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Peter Mitrouchev

Centre national de la recherche scientifique

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P. Mitrouchev

Centre national de la recherche scientifique

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Bin He

Shanghai University

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