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Song L.,China University of Mining and Technology | Song L.,State Key Laboratory of Deep Rock Mechanics and Engineering | Liu W.,China University of Mining and Technology | Liu W.,State Key Laboratory of Deep Rock Mechanics and Engineering | And 3 more authors.
Procedia Engineering | Year: 2011

Gas coal has also scale-dependent mechanical properties like many other rock materials. It becomes significant to select its mechanics parameters for determining critical conditions of coal and gas outburst and other application in fields such as the underground excavation design of room and pillar. Based on the Weibull theory, a scale constitutive model in uniaxial compression for gas-saturated coal is raised. The scale-dependent variation of ultimate compression strength under different gas pressure is specifically studied. We discuss the effects of interfacial friction during testing and modify our model according to the testing results. Results show that, the ultimate compression strength of coal samples decreases as gas pressure and the ratio of height to diameter increase. The differences between theoretical and experimental results for ultimate compression strength mainly depend on the interfacial friction. The model reasonably agrees with the testing results after modifying, and it can reflect the law of changeable uniaxial compressive strength with the coal sample size and describe almost the whole process of uniaxial loading. © 2011 Published by Elsevier Ltd. Source

Xing P.,Nanchang Hangkong University | Yin X.,Xuzhou Construction Machinery Group Co. | Zhao J.,Henan Mechanical and Electrical Engineering College
Applied Mechanics and Materials | Year: 2010

The mixing blades of concrete mixer, is a relatively complex spatial surface, which is difficult to manufacture. The high cost of traditional mold making does not apply to new product development and experimental studies. So, this paper presents a rapid manufacture method of balde mold, which using the UG software for blade parametric design, and then sub-cutting it to calculate the section coordinates. According to the coordinates, the steel plate had been cut and welded into a mold, through which, the blades can be pressed. Because of its convenient and low-cost, the method is particularly applicable to the occasions of experimental research. © (2010) Trans Tech Publications. Source

Zhang Y.,Harbin Engineering University | Deng J.,Jiangxi Electric Power Research Institute | Shao Y.,Harbin Engineering University | Shi Q.,Xuzhou Construction Machinery Group Co. | And 3 more authors.
Corrosion Reviews | Year: 2014

Polyaniline/organophilic montmorillonite (PANI/OMMT) composite powders were synthesized by in situ intercalation polymerization and were added to the epoxy coating as an anti-corrosive pigment. Fourier translation infrared spectroscopy (FT-IR), X-ray diffraction, and contact angle test were used to characterize the PANI/OMMT powders. The epoxy coating containing the PANI/OMMT powders was studied by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and pull-off adhesion test. The results indicated that a unique combination of OMMT and PANI was realized by in situ intercalation polymerization, that the hydrophobic property of PANI/OMMT powders was enhanced and PANI/OMMT powders had good compatibility with epoxy resin, and that the anti-corrosive property of PANI/OMMT coating was better than that of epoxy resin coating. © 2014 Walter de Gruyter GmbH, Berlin/Munich/Boston. Source

Xing P.,Nanchang Hangkong University | Zhao J.Y.,Henan Mechanical and Electrical Engineering College | Yin X.J.,Xuzhou Construction Machinery Group Co.
Advanced Materials Research | Year: 2011

The inverted umbrella aerator is the key equipment of biological wastewater treatment technology, which have the effects of oxygenation, mixing and plug-flow. the design and optimization of the mixing impeller is most important to the efficiency of oxygenation.In this paper, the solid modeling and finite element analysis and optimal design of aerator blades was made based on the study of the oxygenation mechanism.Firstly, the working process of the blades have been studied through solid modeling, mesh generation and finite element analysis process, and the stress-strain finite element analysis was offered based on Nastran, which identified the weak links in the leaves. And more, the optimize and improve designs for the production was made,which set the foundation for the manufacture of the blades. © (2011) Trans Tech Publications. Source

Xing P.,Xian Jiaotong University | Xing P.,Nanchang Hangkong University | Yin X.,Xuzhou Construction Machinery Group Co. | Zhao J.,Henan Mechnical and Electrical Engineering College
Advanced Materials Research | Year: 2011

In this paper, the pressure of s195 diesel engine was forecast and analyzedthrough the equation of combustion established accordingly. And the result was evaluated by the test, which based on the different proportions of the diesel and bio-diesel fuel, then, the very inosculated result was received at last. And more, by measuring the content of soot and NOX, it was found that the waste let became better along with the increase of biodiesel, but was lower in dynamical nature. Through the synthesis value the content of biodiesel about 10% was the best. Source

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