Elastic properties of 2D auxetic honeycomb structures- a review

The research field of auxetics, materials or structures exhibiting a negative Poisson's ratio, has received attention because of the unusually advantageous material properties that can be achieved with it, such as high indentation resistance and high shear resistance. In the past decades, the theoretical understanding of different factors that can lead to an auxetic behaviour has advanced greatly, resulting in a rapid increase in the number and type of the structures designed to exhibit this behaviour. These now exploit a number of different mechanisms, providing a large selection of properties which can be tailored for the specific needs. This review aims to describes the auxetic structures that have currently been identified and designed, describing the different approaches utilised to define their mechanical behaviour and analysing their structural properties, limitations, and potential field of application. In particular, the focus lies on the major works within the field, discussing their limitations and addressing works done to complement them.

Automated summary

The field of auxetics, which focuses on materials or structures with a negative Poisson's ratio, has gained attention due to their advantageous properties including high indentation and shear resistance. Significant progress has been made in understanding the factors contributing to auxetic behavior, resulting in a wide variety of designed structures. This review provides an overview of identified and designed auxetic structures, discussing their mechanical behavior, structural properties, limitations, and potential applications, with a focus on important works and complementary research.