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: Hybrid Micromechanical Modelling Piezoresistivity of Graphene Reinforced Porous Cement Composites

Abstract: The incorporation of graphene and its derivatives into cement for electrically conductive composites is currently under extensive investigations due to their potential applications as smart materials for large-scale self-sensing structures. The electrical conductivity of graphene nanoplatelet reinforced cement-based composites (GNPRCCs) stems from the combination of electron hopping and conductive networking. This paper develops a two-step micromechanical modeling to predict the electrical properties of GNPRCCs. Meanwhile, the study investigated the piezoresistance performance of GNPRCCs subjected to mechanical deformation. The electrical conductivity and piezoresistance are measured on cement mortar samples using the four-probe method. The developed model shows excellent agreement with experimental data of electrical conductivity and piezoresistance. The highest gauge factors are observed when the GNP concentration reaches the percolation threshold. Parametric study is carried out to identify the effects of the attributes of GNPs, pores and interphase effect on the electrical and piezoresistant properties of the GNPRCCs.

中文简介：冯闯，博士，教授，博导，长期专注从事高性能/智能复合材料与结构的研究与开发，在Computer Methods in Applied Mechanics and Engineering, Engineering Structures, Composites Part A等权威主流期刊上发表SCI论文近40余篇，多次参加在加拿大、澳大利亚等多个国家举办的国际学术会议并进行学术报告。发表论文三篇入选ESI 高被引论文，一篇入选英国物理学会年度精选论文。论文总被引超1750次，单篇最高被引270余次（第一作者）。发表的论文被清华大学、麻省理工学院、多伦多大学等国内外知名高校多次引用和正面评价。