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Dr Chuang Feng

Topic 1: Eigenvalue Buckling Analysis of Functionally Graded Graphene Platelets Reinforced Cylindrical Shells

Authors: Yu Wang, Chuang Feng, Lili Li, Jie Yang from the School of Engineering, RMIT University, Melbourne Australia

Presented by: Dr Chuang Feng, Research Fellow (Australian Research Council DECRA Fellow) with the School of Engineering at RMIT University, Melbourne, Australia

Abstract

Cylindrical shell structures have wide applications as structural elements in many engineering fields. This paper proposes a new novel class of multi-layered cylindrical shells reinforced by non-uniform distribution of graphene platelets (GPL) in the thickness direction.

 Finite element method (FEM) is used to analyse the elastic buckling behaviours of the cylindrical shells, for which the effective Young’s modulus of the composites is determined by modified Halpin-Tsai micromechanics model. A comprehensive parametric study is conducted on the influences of the distribution pattern, weight fraction, geometry and size of GPLs together with the total number of layers on the critical buckling load of cylindrical shells with various geometries. It is found that a very small amount of GPLs added into polymer can dramatically increase the critical buckling load of the structure.

Dispersing more GPLs with fewer graphene sheets near the inner and outer surfaces of the cylindrical shell is the most effective way to increase the critical buckling load. Moreover, it is indicated that the effects of distribution pattern on the buckling load become significant when the ratio of radius to thickness of the shell is approximately larger than 10.

Keywords: Graphene platelets; Nanocomposites; Buckling

TOPIC 2: Vibration of functionally graded trapezoidal nanocomposite plates reinforced with graphene nanoplatelets

Authors:  Zhan Zhao, Chuang Feng, Jie Yang from the School of Engineering, RMIT University, Melbourne Australia

Presented by Dr Chuang Feng, Research Fellow (Australian Research Council DECRA Fellow) with the School of Engineering at RMIT University, Melbourne, Australia

Abstract

This paper investigates the free vibration characteristics of a novel class of functionally graded multilayer trapezoidal nanocomposite plates reinforced with non-uniformly distributed graphene nanoplatelets (GPL) by employing the finite element method (FEM). The effective Young’s modulus of the nanocomposites is calculated by Halpin-Tsai micromechanics model including the effects of GPL geometry and size while Poisson’s ratio and mass density are determined by the rule of mixture. A comprehensive parametric study is conducted to study the influences of the distribution pattern, weight fraction, shape and size of GPL nanofillers as well as the total number of layers on the free vibration characteristics of the plates. It is found that the natural frequencies of the trapezoidal plate are significantly enhanced by adding a very small amount of GPLs into the matrix, and that placing more square shaped GPLs with fewer graphene layers near the top and bottom surfaces of the plate is the most effective way to increase the plate stiffness consequently its natural frequencies.

Keywords: Graphene nanoplatelets; Functionally graded nanocomposites; Trapezoidal plate; Natural frequency

Presenter’s resume

Dr Chuang Feng got Bachelor and Master degree from China in 2004 and 2007, respectively. Then he worked as Assistant Professor in a university for three years. In 2014, Dr Feng obtained PhD degree from the University of Western Ontario in Canada. After that, he became a Research Fellow at RMIT University.

Since his Master study, Dr Feng has published 13 papers in journals and 8 in conference proceedings. He has received several competitive scholarships and awards in Canada and Australia, including the Western Graduate Research Award and Academic Achievement Scholarship in Canada and an Endeavour Research Fellowship and ARC DECRA Fellowship in Australia.