Scholarlink

<p>Sandwich composites have demonstrated significant potential for high-end industrial applications, particularly in emerging sectors such as new energy vehicles and aerospace. However, limited research on the structural variations of their core layers has hindered their broader application and further development. In this study, honeycomb sandwich composites were fabricated with plain-weave carbon fiber/epoxy resin face sheets and aluminum honeycomb cores. Low-velocity impact tests and post-impact compression tests of the composite with different parameter combinations by varying cell side lengths, honeycomb wall thicknesses, and core heights were conducted. The damage mechanisms were further analyzed using a 3D profilometer and scanning electron microscopy (SEM). The results indicated that the honeycomb core induces a secondary load increase during the impact response, accompanied by a multi-stage damage evolution process and a dynamic transformation of the load-bearing mechanism. Under an impact energy of 30&#xa0;J, the L4-T0.06-H5 exhibited the highest peak load of 5.36&#xa0;kN, which was 70.28% higher than that of the L4-T0.06-H10, effectively improving the energy absorption capacity. Compression-after-impact tests revealed that the L2-T0.06-H10 had the highest residual strength retention of 0.74, demonstrating superior damage tolerance and the structural integrity. This work pioneers a new direction for sandwich composites, and the proposed design ensures structural integrity preservation under post-damage conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Damage Mechanism of Honeycomb Sandwich Composites with Superior Low-Velocity Impact Behavior and Residual Compressive Strength

  • 期刊论文

  • 发表日期：

    2026年2月18日

查看全文
  • Jiarun Zhang,
  • Xiaoping Gao,
  • Xiaori Yang,
  • Wei Wu,
  • Mingze Gao,
  • Jinwei Yang

摘要

Sandwich composites have demonstrated significant potential for high-end industrial applications, particularly in emerging sectors such as new energy vehicles and aerospace. However, limited research on the structural variations of their core layers has hindered their broader application and further development. In this study, honeycomb sandwich composites were fabricated with plain-weave carbon fiber/epoxy resin face sheets and aluminum honeycomb cores. Low-velocity impact tests and post-impact compression tests of the composite with different parameter combinations by varying cell side lengths, honeycomb wall thicknesses, and core heights were conducted. The damage mechanisms were further analyzed using a 3D profilometer and scanning electron microscopy (SEM). The results indicated that the honeycomb core induces a secondary load increase during the impact response, accompanied by a multi-stage damage evolution process and a dynamic transformation of the load-bearing mechanism. Under an impact energy of 30 J, the L4-T0.06-H5 exhibited the highest peak load of 5.36 kN, which was 70.28% higher than that of the L4-T0.06-H10, effectively improving the energy absorption capacity. Compression-after-impact tests revealed that the L2-T0.06-H10 had the highest residual strength retention of 0.74, demonstrating superior damage tolerance and the structural integrity. This work pioneers a new direction for sandwich composites, and the proposed design ensures structural integrity preservation under post-damage conditions.