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9 results on '"Chen, Jintao"'

5. Significant positive magnetoresistance of graphene/carbon composite films prepared by electrospraying and subsequent heat treatment

Author

Jianlin Li, Xia Liu, Chen Jintao, Lianjun Wang, Zijia Zhang, Wan Jiang, and Chen Liqing

Subjects
Materials science, Magnetoresistance, Silicon, Graphene, Composite number, Polyacrylonitrile, chemistry.chemical_element, Nanotechnology, General Chemistry, law.invention, chemistry.chemical_compound, chemistry, law, General Materials Science, Composite material, Carbon, Graphene nanoribbons, Graphene oxide paper
Abstract

Graphene/carbon composite films were prepared by electrospraying a graphene/polyacrylonitrile composite solution on SiO2-coated silicon substrates and subsequent heat treatment. The as-produced graphene/carbon composite films had a porous structure comprising graphene layers. With a magnetic field applied perpendicularly to the sample, an unexpectedly significant positive magnetoresistance attributed to e–e interaction and weak localization has been observed, which constantly increases with the magnetic field in the temperature range of 300–50 K from 0 to 80 kOe.

Published
2012
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6. A finite element model for numerical simulation of thermo-mechanical frictional contact problems

Author

Duan Qinglin, Chen Jintao, Zhang Hong-wu, and Han Wei

Subjects
Classical mechanics, Finite element limit analysis, Mechanical Engineering, Computational Mechanics, Contact analysis, Thermal contact, Smoothed finite element method, Mixed finite element method, Mechanics, Boundary knot method, Finite element method, Extended finite element method, Mathematics
Abstract

Two kinds of variational principles for numerical simulation of heat transfer and contact analysis are respectively presented. A finite element model for numerical simulation of the thermal contact problems is developed with a pressure dependent heat transfer constitutive model across the contact surface. The numerical algorithm for the finite element analysis of the thermomechanical contact problems is thus developed. Numerical examples are computed and the results demonstrate the validity of the model and algorithm developed.

Published
2003
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