Nanostructured nacre-inspired composites: unveiling microballistic impact dynamics

Abstract

The accelerating research and innovation in armor materials development have had a significant impact on enhancing the safety of individuals, communities, and entire nations, making it a crucial field of study. In recent years, nature has played a significant role in shaping recent technological advancements in this field. Among the class of impact resistant natural materials, nacre has demonstrated excellent strength and toughness due to its hierarchical layered arrangement.

In this study, we utilize all-atom molecular dynamics simulations to investigate the impact resistance characteristics of microstructures inspired by nacre. We focus on microballistic impact studies to explore the impact-resistant properties, with a specific emphasis on examining the influence of grain size in a multi-layered graphene-polyethylene composite, modeled via reliable force fields. Furthermore, a thorough examination of the fundamental molecular mechanisms that govern deformation behavior is conducted, and strategy for optimization of the impact resistance is developed. This effort enhances our comprehension of the complex relationship between structure and properties in impact-resistant materials inspired by nature, providing valuable insights for creative material design and engineering applications