• 文献标题:   Probing the molecular-level energy absorption mechanism and strategic sequencing of graphene/Al composite laminates under high-velocity ballistic impact of nano-projectiles
  • 文献类型:   Article
  • 作  者:   GUPTA KK, MUKHOPADHYAY T, DEY S
  • 作者关键词:   kinetic energy absorption, highvelocityimpact, ballistic performance of graphene, al, composite, graphene reinforced aluminum composite, disordered graphene composite
  • 出版物名称:   APPLIED SURFACE SCIENCE
  • ISSN:   0169-4332 EI 1873-5584
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.apsusc.2023.156502 EA MAY 2023
  • 出版年:   2023

▎ 摘  要

Motivated by recent discoveries concerning the extreme superiority of multilayer graphene in terms of kinetic energy dissipation compared to conventional monolithic materials, this article investigates the ballistic perfor-mance and physics-informed strategic sequencing of graphene-reinforced aluminum laminates under the influ-ence of random disorder based on extensive molecular-level simulations of high-velocity impact. It is unraveled that strategic sequencing of graphene layers within the aluminum matrix can significantly enhance kinetic en-ergy absorption, while preventing complete penetration. However, the reinforcement of bilayer graphene in-creases the projectile's post-impact residual velocity due to high magnitude of stress wave release provided by the reinforcement. We have further mitigated this effect to a significant extent by increasing the effective thickness of Al laminates. Based on the insights gained by a series of molecular-level simulations, we have proposed hybrid multifunctional laminates by coupling two individual configurations with high energy ab-sorption and no penetration, respectively. By strategically providing higher graphene concentration near target surfaces, up to 90.77% of the kinetic energy can be absorbed. The findings of this study would be crucially useful in materializing the bottom-up multi-scale design pathway for producing graphene-reinforced Al composites to develop a novel class of functional barrier material-based engineered surfaces with improved nano-scale ballistic performance.