COMPUTATIONAL SIMULATION OF THE INTERFACE BONDING BETWEEN OXIDIZED CARBON FIBER AND EPOXY MOLECULES

摘要：

　　Considering the long service life of FRP in extensive applications under extreme environment,it is necessary to understand the long-term service performances of FRPs.The water effect on the properties of the interface for FRP material is vital but its mechanisms is still unclear.In this paper,molecular dynamics methods are explored to study the interfacial adhesion of oxidized carbon fiber/epoxy interface under dry and moisture ingress environment.The atomic models of the oxidized CF/epoxy interface at the nanometer scale were established to investigate the bonding performances of the epoxy on carbon fibers under dry and wet conditions.Besides,a quantitative analysis of the surface free energy variation of the carbon fiber/epoxy resin interface with and without water ingress were performed using the enhanced sampling method metadynamics to simulate its debonding process.Compared to the dry environment,a reduction by 52%of the surface free energy was found with saturated water uptake.Water effectively deteriorate the interfacial adhesion through hydrogen bonds formed between epoxy and carbon fiber.

关键词： carbon fiber/epoxy composite interfacial adhesion water ingress MD

作者: Yanrong Xiao Guijun Xian Hui Li

作者单位: Key Lab of Structural Dynamic Behavior and Control of the Ministry of Education,(Harbin Institute of Technology),Harbin 150090,China;School of Civil Engineering,Harbin Institute of Technology(HIT),Harbin 150090,China

会议类型: 国际会议

会议名称: the Sixth Asia-Pacific Conference on FRP in Structures (APFIS2017)(第六届亚太纤维增强复合材料结构工程国际会议暨第十届全国建设工程FRP应用学术交流会)

会议地点: 新加坡

会议语种:英文

页码: 1-10

在线出版日期: 2017-07-19（万方平台首次上网日期，不代表论文的发表时间）