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Sandwich structures are widely used in the aircraft industry due to their lightweight and high stiffness compared to their weight. The typical construction of the sandwich panel consists of two facesheets separated by a core. One of the crucial disadvantages of sandwich structures is their resistance for impact loading. Hail strikes are one of the natural threats to the airplane lightweight structures. The surface indentation or puncture rupture caused by the collision with the object could be the initiation for larger damage such as delamination between facesheet and core, which finally leads to the failure of the structure. The experimental campaign was focused on sandwich structures with facesheets made of carbon textile layers and foam core. The investigation of the impact loading to the sandwich structure were examined on the drop-weight testing machine DW1000 from the STEP Lab corporation. To represent the real-world conditions, the results from the hardened steel indenter will be compared with the outcome from the indenter made of ice. The radius of the impactor and the kinetic energy will be in the strict correlation to imitate the natural properties of the hail.

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Investigation of the Damage of the Sandwich Composite Structure for Aerospace Application Under Impact Loading Caused by Hailfall

  • 会议论文

  • 发表日期：

    2025年

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  • Paweł Zielonka,
  • Michał Smolnicki,
  • Jacek Napora,
  • Karina Krawiec,
  • Szymon Duda,
  • Grzegorz Lesiuk

摘要

Sandwich structures are widely used in the aircraft industry due to their lightweight and high stiffness compared to their weight. The typical construction of the sandwich panel consists of two facesheets separated by a core. One of the crucial disadvantages of sandwich structures is their resistance for impact loading. Hail strikes are one of the natural threats to the airplane lightweight structures. The surface indentation or puncture rupture caused by the collision with the object could be the initiation for larger damage such as delamination between facesheet and core, which finally leads to the failure of the structure. The experimental campaign was focused on sandwich structures with facesheets made of carbon textile layers and foam core. The investigation of the impact loading to the sandwich structure were examined on the drop-weight testing machine DW1000 from the STEP Lab corporation. To represent the real-world conditions, the results from the hardened steel indenter will be compared with the outcome from the indenter made of ice. The radius of the impactor and the kinetic energy will be in the strict correlation to imitate the natural properties of the hail.