Design of compliant flexural beam negative Poisson’s ratio structures based on spatial hexahedron feature points method

• Sheng Lin ^[1] ; Congyang Liu ^[1] ; Changfa Zhou ^[1] ; Gang Li ^[1]
  1. [1] Dalian Jiaotong University

     Dalian Jiaotong University

     China

     
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 53, Nº. 10, 2025, págs. 7033-7049
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • Space curved beams with negative Poisson’s ratio (NPR) structures are extensively utilized in aerospace, medical, and other fields due to their exceptional extensibility. The design and optimization have garnered significant research attention owing to their inherent complexity. In this study, we propose a novel NPR cellular designed using the hexahedron feature point method. We designed the NPR cellular unit based on the proposed design method. The unit was subjected to isogeometric theoretical analysis and finite element simulation validation. The results confirm that adjusting the control point weights of the curved beams can significantly enhance the NPR performance of the cellular unit. By employing an array of these cellular units, a spatial NPR structure was designed. Both simulation and experimental analyses demonstrate that the designed structure exhibits negative Poisson’s ratio characteristics, and the value of the negative Poisson’s ratio can be tuned by altering the parameters of the curved beams. The findings of this research offer valuable insights for the development of future NPR structures and provide an innovative framework for designing advanced metamaterial systems with tailored mechanical properties.