Notch Flexure as Kirigami Cut for Tunable Mechanical Stretchability towards Metamaterial Application

Kirigami is an art of paper cutting, which can be used in mechanical metamaterials, actuators, and energy absorption based on its deployable load-deflection characteristics. Traditional cuts with zero width produce undesirable plastic deformation or even tear fracture due to stress concentration stretching. This study proposes enlarge the cut into a notch flexure, applied orthogonality-cutted kirigami sheet, buckles out plane 3D configuration patterns under uniaxial tension. The use compliant beam as makes distribution around more uniform both elastic elastoplastic regime. experimental numerical results show that by tuning geometric parameters material properties sheets, trigger condition adjusted. Potential capability tunable phononic wave propagation this kirigami-inspired metamaterial demonstrated. design methodology offers theoretical guide for kirigami-based structures.