Energy absorption of thin walled tube filled with gradient auxetic structures-theory and simulation

• Published in: International journal of mechanical sciences Vol. 201; p. 106475
• Main Authors: Gao, Qiang, Liao, Wei-Hsin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2021
• Subjects: Auxetic structures; Energy absorption; Gradient; Thin walled tube; Thin walled tube; Gradient; Energy absorption; Auxetic structures
• ISSN: 0020-7403; 1879-2162
• DOI: 10.1016/j.ijmecsci.2021.106475

•A thin walled tube filled with double arrowed gradient auxetic structure is proposed.•Analytical models are established to predict the dynamic characteristics of thin walled tubes filled with auxetic structures.•Compared to the numerical simulations, the analytical models are accurate to predict the dynamic responses. In recent years, auxetic structures have been applied in the energy absorption field due to the unique mechanical properties. Inspired by foam filled structures, this study proposes a thin walled structure filled with double arrowed auxetic structure and investigates the energy absorption characteristics. The gradient configuration is introduced to improve the energy absorption performance. The effects of the gradients on the energy absorption are investigated. A theoretical model is also established to predict the energy absorption to quantify the energy dissipated due to thin walled tubes, gradient auxetic structures and their interactions. The accuracy of the theoretical model to predict the energy absorption characteristics is validated through the numerical simulations. [Display omitted]