The chiral lattice is a unique structural network not symmetric to its mirror image, and with a negative Poisson’s ratio. Previous investigations have considered this structural network for the design of superior structural components with sandwich construction, but these were limited by the in-plane Poisson’s ratio predicted to be exactly −1. This paper presents estimates of the mechanical pro...

Volume-changing robotic units present an exciting pathway for modular robotics. However, current attempts have been relatively limited, requiring tethers, complex fabrication or slow cycle times. In this letter, we AuxBots: auxetic-based approach to create high force, fast time self-contained modules. By driving the auxetic shell's expansion with a motor and leadscrew, these robots are capable ...

Abstract Auxetic materials showing a negative Poisson’s ratio can offer unusual sensing capabilities due to drastic percolation changes. This study presents the capacitive response of wet-fractured carbon nanotube paper composites in exposure humidity. A strained composite strip is fractured produce numerous cantilevers consisting cellulose fibers coated with nanotubes. During stretching, thin ...

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 ...

Auxetic structures (AXSs) are a novel class of materials with unique mechanical deformation behavior associated negative Poisson ratio. The combination AXS configurations various types has unveiled wide field applications, including military high-velocity protection against explosions and ballistic projectiles. However, the characteristic geometric re-entrant model AXSs imposes limitations diff...

Auxetic lattices have attracted increasing attention due to their unusual mechanical behavior and potential for an array of applications. However, a narrow window stiffness realizable given cell topology limits In this study, pair novel 2D re-entrant auxetic capable exhibiting enhanced energy absorption is proposed by introducing vertical ligaments into conventional structures. These modified w...