Understanding Degradation of Fiber/Matrix Interface Under Environmental Effects Using Molecular Simulation


Wu C., Wu R., Tam L.

10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE), İstanbul, Turkey, 8 - 10 December 2021, vol.198, pp.2096-2108 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 198
  • Doi Number: 10.1007/978-3-030-88166-5_181
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.2096-2108
  • Keywords: Fiber reinforced polymer, Fiber/matrix interface, Degradation, Environmental effect, Molecular dynamics, REINFORCED POLYMER COMPOSITES, MECHANICAL-PROPERTIES, FRP COMPOSITES, ALKALINE-SOLUTION, CARBON-FIBERS, DURABILITY, WATER, DYNAMICS, ADHESION, BEHAVIOR
  • Istanbul Technical University Affiliated: No

Abstract

With promising mechanical properties, fiber reinforced polymer (FRP) composite has increasing applications in civil engineering, such as external strengthening material for building structures, and load-bearing component and internal reinforcement for new constructions. During intended service-life, the composite is inevitably exposed to changing environments with high levels of temperature, humidity, and ions, and the interfacial degradation between fiber and matrix becomes a critical problem, which leads to interfacial debonding and consequent composite degradation. In order to predict the long-term performance of composite material, it is important to understand the interfacial degradation between fiber and matrix under environmental effects. As a bottom-up approach, molecular dynamics simulation enables the molecular modeling of fiber/matrix interface and the simulation of molecular interactions occurred in local interfacial region, which contributes to the understanding of interfacial degradation under different environment exposures. In this work, recent research progress in understanding the environmental effects on the bonding degradation of fiber/matrix interface from a molecular level is presented. Based on the developed interface models, the variations of molecular structure and related degradation of interfacial properties under different environmental exposures are discussed, and the molecular interactions at the interface are investigated to explore the underlying mechanism. Furthermore, future research direction involving the development of fiber/matrix interface model for further characterization of the interfacial degradation is also provided.