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<p>Graphene origami-enabled metamaterials (GOEMs) represent a novel graphene composite, where sophisticated micro-architectural design enables the combination of a negative Poisson’s ratio (NPR) and outstanding mechanical performance. This unique material architecture paves the way for new paradigms in next-generation underwater protection. This study integrates GOEMs into pressure-resistant cylindrical shells. By coupling the material model of GOEMs with Reddy’s higher-order shear deformation shell theory, the governing equations for the nonlinear large deformations of GOEM cylindrical shells are deduced. Subsequently, these equations are solved via an accurate Galerkin method, thereby obtaining the nonlinear post-buckling response of the shells under hydrostatic pressure. Systematic parametric investigations reveal the impacts of geometric parameters, content, distribution patterns, and folding degree of graphene origami (Gori) on the post-buckling behavior of GOEM cylindrical shells. It has been found that the NPR effect can moderately compromise the load-bearing capacity of the shell. Furthermore, positioning a larger quantity of graphene near the inner and outer surfaces of the shell is conducive to enhancing the structural performance. The findings provide theoretical foundations and design guidelines for advancing intelligent underwater protective structures based on GOri technology.</p>

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Post-Buckling Behavior of Graphene Origami Metamaterial-Reinforced Laminated Cylindrical Shells Under Hydrostatic Pressure

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Jinsuo Li,
  • Haowei Zhao,
  • Congao Zhang,
  • Yongqi Li,
  • Jiabin Sun,
  • Zhenhuan Zhou

摘要

Graphene origami-enabled metamaterials (GOEMs) represent a novel graphene composite, where sophisticated micro-architectural design enables the combination of a negative Poisson’s ratio (NPR) and outstanding mechanical performance. This unique material architecture paves the way for new paradigms in next-generation underwater protection. This study integrates GOEMs into pressure-resistant cylindrical shells. By coupling the material model of GOEMs with Reddy’s higher-order shear deformation shell theory, the governing equations for the nonlinear large deformations of GOEM cylindrical shells are deduced. Subsequently, these equations are solved via an accurate Galerkin method, thereby obtaining the nonlinear post-buckling response of the shells under hydrostatic pressure. Systematic parametric investigations reveal the impacts of geometric parameters, content, distribution patterns, and folding degree of graphene origami (Gori) on the post-buckling behavior of GOEM cylindrical shells. It has been found that the NPR effect can moderately compromise the load-bearing capacity of the shell. Furthermore, positioning a larger quantity of graphene near the inner and outer surfaces of the shell is conducive to enhancing the structural performance. The findings provide theoretical foundations and design guidelines for advancing intelligent underwater protective structures based on GOri technology.