Manufacturing, characteristics and applications of auxetic foams: A state-of-the-art review

Auxetic foams counter-intuitively expand (shrink) under stretching (compression). These can exhibit superior mechanical properties such as resistance to shear and indentation, improved toughness energy absorption (EA) several types of loadings. Their unique deformation mechanism manufacturing process lead special multiphysics variable permeability, synclastic curvature shape memory. Except for traditional absorber stuff, the potential applications auxetic have involved biomedicine, aerospace, smart sensing, etc. However, most are restrained in theoretical stage due complicated fabrication a deficiency stability. For removing barrier practical application, series issues remain be resolved, though explorations manufacture methodologies fruitful past decades. We present here review article discussing state-of-the-art manufacturing, characterization foams. also provide view existing challenges possible future research directions, aiming state perspective inspire researchers further develop field