2023 2nd International Conference on Applied Mathematics and Physics (ICAMP 2023)
Prof. Dr. Chuang Feng

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Prof. Dr. Chuang Feng, Nanjing Tech University, China

Biography: Dr. Chuang Feng obtained his PhD at The University of Western Ontario in Canada in 2014. From Janurary 2015 to September 2019, he worked as Research Fellow and DECRA Fellow at RMIT University in Melbourne, Australia. Dr. Feng joined Nanjing Tech University as a full professor in 2019, Dr Feng has published more than 40 SCI papers with more than 2000 citations and h-index being 22. Three of his published papers are ESI highly cited and one of them was IOPselect due to its novelty and potential and significant impact on future research. His research work has attracted interests from well known world-class universities and research institutes. During the past few years, Dr. Feng has gained more than 6000,000 RMB research funding nationally and internationally. He served as reviewing expert for a number of research fundings, including Natural Science Foundation of China, Natural Science Foundation of Beijing, Austratrian Research Council, etc. [More]


Speech title: Micromechanical Modelling on Electrical Conductivity of Graphene Reinforced Porous and Saturated Cement Composites

Abstract: The incorporation of graphene and its derivatives as inclusions for electrically conductive cement composites is currently under extensive investigations due to their potential applications in structural health monitoring. Experiments have shown that the electrical conductivity of the cement composites is highly dependent on the porosity and the fluid contained in the pores. Therefore, it is necessary to quantitatively predict the overall electrical conductivity of the graphene reinforced cement composites while identifying the effects of the pores and the fluid contained. Taking graphene nanoplatelets (GNPs) as inclusions, samples are prepared by wet method, and the electrical conductivity of the samples with different saturations are tested by four-probe method. Constitutive equations for electron tunneling and interface resistance are established while determining the electrical conductivity of GNP reinforced cement composites (GNPRCC), in which the effects of pore and saturation are incorporated. A hybrid micromechanical model (HMM) with a two-step homogenization frame work and a functionally graded electric double layer (FGEDL) simulating saturated pores is developed for the first time. Our model shows excellent agreement with experimental data for different scenarios compared to other models. It is found for the HMM-FGEDL the enhancement of GNPs needs to be considered before incorporating pores for dry samples, whereas pores need to be considered first for saturated ones. Setting the aspect ratio of pores to be 0.01, which is the consistent with the internal-cracks observed in experiments, is preferred while modelling the electrical conductivity of the GNPRCCs.