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Debonding and impact tolerant sandwich panel with hybrid foam core

机译：具有混合泡沫芯的​​脱胶和耐冲击夹芯板

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摘要

A major problem of sandwich panels is the debonding at or near the core/face sheet interface, especially under impact loading, which can lead to sudden loss of structural integrity and causes catastrophic consequences. The objective of this study is to develop and characterize new sandwich panels which are based on hybrid cores consisting of metallic millitubes and polymer matrix. To this end, two types of new hybrid cores were proposed. One consisted of polymer resin reinforced by vertically (transversely) aligned continuous metallic millitubes, denoted as Type-Ⅰ sandwich panel. The other was made of polymer resin reinforced by horizontally (longitudinally) aligned continuous metallic millitubes, denoted as Type-Ⅱ sandwich panel. Additionally, traditional sandwich panels with syntactic foam core were also prepared for comparison. Quasi-static compression and bending tests, low velocity impact test, and ballistic impact test demonstrated that the interface debondings and the subsequent shear failure in the core could be largely excluded from the Type-Ⅱ panel. Meanwhile, a significant transition to ductile failure mode was observed in Type-Ⅱ sandwich panel with dramatically enhanced load carrying capacity and impact energy dissipation. The results indicated that Type-Ⅱ panel may be considered as an alternative for sandwich structures requiring debonding and impact tolerance.
机译：夹心板的主要问题是芯/面板界面处或附近的剥离，尤其是在冲击载荷下，这可能导致结构完整性突然丧失并造成灾难性后果。这项研究的目的是开发和表征新的夹心板，该夹心板基于由金属微粒和聚合物基体组成的混合芯。为此，提出了两种类型的新型混合核。其中一种由聚合物树脂组成，这些聚合物树脂由垂直（横向）排列的连续金属微粒增强，称为Ⅰ型夹心板。另一种由水平（纵向）排列的连续金属微粒增强的聚合物树脂制成，称为Ⅱ型夹心板。此外，还准备了具有句法泡沫芯的传统夹心板进行比较。准静态压缩和弯曲试验，低速冲击试验和弹道冲击试验表明，Ⅱ型面板可大大排除界面剥离和随后的岩心剪切破坏。同时，在Ⅱ型夹心板中观察到了向延性破坏模式的明显过渡，从而显着提高了承载能力和冲击能量耗散。结果表明，对于需要脱胶和耐冲击性的夹层结构，Ⅱ型面板可以作为替代品。

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  • 来源
    《Composite Structures》 |2013年第9期|143-150|共8页
  • 作者

    Gefu Ji; Zhenyu Ouyang; Guoqiang Li;

  • 作者单位

    Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA;

    Department of Mechanical Engineering, Southern University and A&M College, Baton Rouge, LA 70813, USA;

    Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA,Department of Mechanical Engineering, Southern University and A&M College, Baton Rouge, LA 70813, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sandwich panel; Hybrid core; Metallic tube; Low velocity impact; Ballistic impact; Interfacial debonding;

    机译：夹芯板;混合芯;金属管;低速冲击;弹道冲击;界面剥离;

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