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<p>Sandwich composite structures are extensively applied in aerospace, shipbuilding and energy engineering owing to their excellent mechanical properties and structural flexibility. In this paper, a novel ceramic/multi-strand twisted wire based entangled material (MTWEM) sandwich structure, whose core layer is divided into multi-strand twisted spiral coil (SC-MTWEM) and multi-strand twisted wire mesh (WM-MTWEM), is fabricated, and the shear damage behavior of the sandwich structure is investigated. By observing the microscopic morphology, the surface of the joint organization is intact and flawless, and the element distribution and compound composition of each part are analyzed. The experimental results indicate that the damage is dominated by the fracture of the ceramic panel and the shear deformation of MTWEM. The damage form is validated by simulation analysis. As the density and thickness of MTWEM increase, the shear resistance increases, but the damage occurs in advance. The fracture is postponed due to the thickening of the ceramic panel, but the core layer with the same parameters contributes to the stabilization of its shear resistance. The special interlocking structure of WM-MTWEM provides better resistance to shear deformation than SC-MTWEM with the same parameters, but the damage of ceramic panel occurs earlier.</p>

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Shear behavior and damage forms of ceramic/multi-strand twisted wire-based entangled materials sandwich structure

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Yu Tang,
  • Qihang Dai,
  • Jialong Chen,
  • Bao Zi,
  • Yiwan Wu,
  • Dang Wei,
  • Hongbai Bai

摘要

Sandwich composite structures are extensively applied in aerospace, shipbuilding and energy engineering owing to their excellent mechanical properties and structural flexibility. In this paper, a novel ceramic/multi-strand twisted wire based entangled material (MTWEM) sandwich structure, whose core layer is divided into multi-strand twisted spiral coil (SC-MTWEM) and multi-strand twisted wire mesh (WM-MTWEM), is fabricated, and the shear damage behavior of the sandwich structure is investigated. By observing the microscopic morphology, the surface of the joint organization is intact and flawless, and the element distribution and compound composition of each part are analyzed. The experimental results indicate that the damage is dominated by the fracture of the ceramic panel and the shear deformation of MTWEM. The damage form is validated by simulation analysis. As the density and thickness of MTWEM increase, the shear resistance increases, but the damage occurs in advance. The fracture is postponed due to the thickening of the ceramic panel, but the core layer with the same parameters contributes to the stabilization of its shear resistance. The special interlocking structure of WM-MTWEM provides better resistance to shear deformation than SC-MTWEM with the same parameters, but the damage of ceramic panel occurs earlier.