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Low velocity impact response of 3D printed structures formed by cellular metamaterials and stiffening plates: PLA vs. PETg

机译:通过蜂窝上金属材料和加强板形成的3D印刷结构的低速冲击响应:PLA与PETG

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摘要

This work studies the low-velocity impact response of 3D-printed layered structures made of thermoplastic materials (PLA and PETg), which form sacrificial claddings for impact protection. The analyzed structures are composed of crushable cellular cores placed in between terminal stiffening plates. The cores tessellate either honeycomb hexagonal unit cells, or hexagonal cells with re-entrant corners, with the latter exhibiting auxetic response. The given results highlight that the examined PETg protectors exhibit higher energy dissipation ratios and lower restitution coefficients, as compared to PLA structures that have the same geometry. It is concluded that PETg qualifies as an useful material for the fabrication of effective impact protection gear through ordinary, low-cost 3D printers.
机译:这项工作研究了由热塑性材料(PLA和PETG)制成的3D印刷分层结构的低速冲击响应,从而形成牺牲衬垫用于冲击保护。分析的结构由放置在端子加强板之间的可抵抗力蜂窝芯构成。核心镶嵌蜂窝状六方单元细胞,或具有​​再参与角的六边形细胞,后者表现出辅助反应。与具有相同几何形状的PLA结构相比,给定的结果突出显示所检查的PECG保护器表现出更高的能量耗散比和较低的恢复系数。得出结论,PETG有资格作为通过普通的低成本3D打印机制造有效冲击保护齿轮的有用材料。

著录项

  • 来源
    《Composite Structures》 |2021年第1期|113128.1-113128.12|共12页
  • 作者单位

    Univ Nova Lisboa Fac Ciencias Tecnol CERIS P-2829516 Caparica Portugal|Univ Nova Lisboa Fac Ciencias & Tecnol Dept Engn Civil P-2829516 Caparica Portugal;

    Univ Nova Lisboa Fac Ciencias & Tecnol Dept Engn Civil P-2829516 Caparica Portugal|Univ Nova Lisboa Fac Ciencias & Tecnol CINAMIL P-2829516 Caparica Portugal;

    Univ Nova Lisboa Fac Ciencias & Tecnol Dept Engn Civil P-2829516 Caparica Portugal;

    Univ Lisbon CENTEC P-1049001 Lisbon Portugal|Univ Lisbon Inst Super Tecn P-1049001 Lisbon Portugal;

    Univ Nova Lisboa Fac Ciencias Tecnol CERIS P-2829516 Caparica Portugal|Univ Nova Lisboa Fac Ciencias & Tecnol Dept Engn Civil P-2829516 Caparica Portugal;

    Univ Naples Parthenope Dept Engn I-80143 Naples Italy;

    Univ Salerno Dept Civil Engn I-84084 Fisciano SA Italy;

  • 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

    Cellular metamaterials; Low velocity impact; PLA; PETg; Auxetic response;

    机译:细胞超材料;低速冲击;PLA;PETG;辅助反应;

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