Recent advances in graphene origami-enabled auxetic metamaterial structures

Abstract

Mechanical metamaterials (MMs) have garnered significant attention in recent years owing to their extraordinary mechanical properties that cannot be found in natural materials. As a distinctive class of MMs, graphene origami-enabled auxetic metamaterials (GOEAMs) offer unique advantages over traditional MMs and possess materials properties that are independent of complicated architecture or topology. Since its concept was first proposed in 2021, this emerging field has quickly attracted the attention from many researchers who have carried out extensive studies on the design and analysis of various GOEAM structures. This paper aims to provide a comprehensive review and systematic discussion on the state-of-the-art in this emerging field, beginning with a brief introduction of origami as well as the mechanical and physical properties of graphene and graphene origami (GOri). Subsequently, the modelling framework of GOEAMs and the commonly employed approaches for predicting their effective material properties are reviewed. This is followed by detailed discussions on the structural responses, including bending, buckling, postbuckling and free vibration of various GOEAM structures under different loading conditions. The article also identifies current challenges and future research directions, offering valuable insights into the future development and practical engineering applications of GOEAM based structures.