Molecular interfacial shearing creep behavior of carbon fiber/epoxy matrix interface under moisture condition

Tam, Lik‐ho; Minkeng, Marc A. Ntjam; Lau, Denvid; Mansour, Walid; Wu, Chao

doi:10.1016/j.engfracmech.2023.109177

Cited by 35 publications

(5 citation statements)

References 68 publications

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“…To elucidate and substantiate the mechanisms underlying this enhanced interface bonding, molecular dynamics (MD) simulations are leveraged [18,19]. These simulations serve to validate and provide a detailed insight into the complex interactions occurring at the atomic level, reinforcing the mechanical performance of the composite material [20,21]. By elucidating the interplay between modified graphite surfaces and epoxy resin, this investigation contributes to a deeper understanding of composite material design, offering valuable insights for the continued development and optimization of graphite-resin composites.…”

Section: Energy Proceedingsmentioning

confidence: 99%

Effects of Surface Functionalization on Interface Bonding of Graphite/Epoxy Composites

Yao,

Zheng,

Ming

2024

Preprint

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Epoxy resin-reinforced graphite composite materials have found significant applications in the construction of fuel cell bipolar plates under stable power supply, owing to their lightweight and high durability characteristics. These composite materials are formulated by blending graphite with thermosetting resin and curing agent. The interfacial bonding between graphite and epoxy resin plays a pivotal role in determining the performance of these composites. Typically, the bonding between graphite and resin is governed by van der Waals forces, which possess relatively lower binding energy, rendering the interface susceptible to failure under external forces. To address this limitation, this study endeavors to modify the graphite surface with functional groups and adjust the process to facilitate a chemical bonding interface between graphite and resin. Characterization techniques reveal the formation of new chemical bonds between graphite and resin. Molecular dynamics simulations further validate the detailed mechanism through which this enhanced interface bonding elevates the mechanical performance of the composite material. This investigation offers valuable insights for the advancement of graphite-resin composite materials.

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Section: Energy Proceedingsmentioning

confidence: 99%

Effects of Surface Functionalization on Interface Bonding of Graphite/Epoxy Composites

Yao,

Zheng,

Ming

2024

Preprint

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“…When the impact load acted on the composite material, the deformation of the fibers and resin caused relative displacement between them, resulting in interfacial shear. Interfacial shear leads to stress concentration near the interface, causing interface debonding, the formation of microcracks, and even interface failure [32]. When the energy was less than 9 J, the material primarily consumed impact energy through the deformation of the fibers and resin.…”

Section: Effect Of Surface Treatment On Impact Resistancementioning

confidence: 99%

Influence of Interface Modification on the Moisture Absorption and Thermal Resistance of Ramie Fiber/Degradable Epoxy Composites

Geng,

Cai

2024

Materials

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Natural fiber/degradable epoxy composites have received much attention for their advantages of low carbon emissions, low environmental pollution, and utilization of renewable resources. However, the poor interfacial bonding strength and inferior moisture resistance of natural fiber/degradable epoxy composites restrict their application areas. In order to improve the moisture and heat resistance of natural fiber/degradable epoxy resin-based composites, this study modified the surfaces of ramie fibers with hydroxylated carbon nanotubes, silane coupling agents, and sodium hydroxide, respectively. Three types of modified ramie fiber/degradable epoxy composites, namely F-CN-DEP, F-Si-DEP, and F-OH-DEP, were prepared using a winding forming process. The water absorption rate and short-beam shear strength of the materials were tested under different environments, and the fiber morphology and thermal–mechanical properties of the materials were investigated by scanning electron microscopy (SEM) and dynamic mechanical analysis (DMA). The results show that F-CN-DEP exhibited the lowest moisture absorption rate; the highest shear strength, of 43.8 MPa; and a glass transition temperature (Tg) of 121.7 °C. The results demonstrate that carbon nanotubes on the fiber surface can improve the interfacial stability of ramie fiber/degradable epoxy composites in humid and hot environments. These results give guidelines for the development of natural fiber/degradable epoxy composites.

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“…Creep is one of the timedependent phenomena, which reflects the relaxation of materials. Tam et al 141,144 explored the creep behavior of the fiber-matrix interface at different loads and found a threshold stress for the onset of creep failure, which decreases in moisture conditions.…”

Section: Atomic-and Molecular-scale Simulations Of Frp Compositesmentioning

confidence: 99%

Multiscale mechanics and molecular dynamics simulations of the durability of fiber-reinforced polymer composites

Lin,

Wang

2023

Commun Mater

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Fiber-reinforced polymer (FRP) composites have gained widespread applications in many engineering fields, making it imperative to study long-term performance under service conditions. Due to their heterogeneity and multifield coupling conditions, the long-term performance of FRP composites has become a complex scientific problem that involves multiscale and multidisciplinary aspects. With advancements in nanotechnology and computational power, researchers have increasingly conducted studies on the deterioration mechanisms and durability of FRP composites using top-down experiments and bottom-up multiscale simulations. Here, we review micro- and nano-mechanics in relation to the durability of FRP composites, including progress in the use of atomic and molecular simulations. We elucidate the role of multiscale methods, particularly molecular dynamics simulations, in the study of FRP composites and outline its prospects, to illustrate how micro- and nano-mechanics contribute to research on the durability of FRP composites.

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Molecular interfacial shearing creep behavior of carbon fiber/epoxy matrix interface under moisture condition

Cited by 35 publications

References 68 publications

Effects of Surface Functionalization on Interface Bonding of Graphite/Epoxy Composites

Effects of Surface Functionalization on Interface Bonding of Graphite/Epoxy Composites

Influence of Interface Modification on the Moisture Absorption and Thermal Resistance of Ramie Fiber/Degradable Epoxy Composites

Multiscale mechanics and molecular dynamics simulations of the durability of fiber-reinforced polymer composites

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