Bending resistance and transverse energy absorption behaviors of auxetic tubes with orthogonal pattern of peanut-shaped perforations.

AbstractThe perforated auxetic tube with peanut-shaped perforations (PHT) are proposed and its mechanical responses are investigated by three-point bending experiment and validated finite element simulation. Compared to the auxetic tube with elliptical perforations (EHT) under the same porosity, the PHT exhibits significant improvement of up to 100%, 49%, 34%, and 148% in peak force, bending stiffness, ductility and energy absorption capacity, respectively. Additionally, a parametric analysis is performed to identify the role of each design parameter and provide optimal solutions for the PHT design. This study provides valuable guidance for enhancing the bending mechanical properties of perforated auxetic tubes. [ABSTRACT FROM AUTHOR]