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Effects of ply thickness and architecture on the strength of composite sub-structures

机译：厚度和架构对复合亚结构强度的影响

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摘要

This work presents an experimental study on the effect of: ply thickness; ply-level hybridization; and type of ply architecture on the damage mechanisms that dominate failure and strength of multidirectional laminates. Nine effectively equivalent 0 degrees dominated multidirectional laminates made from unidirectional carbon fibre tapes (UD), non-crimp fabrics (NCF) and spread-tow fabrics (STF) with thickness ranging from 67 mu m to 268 mu m are defined and tested under plain strength tension and compression, open-hole tension and compression, filled-hole compression and tension-bearing. An overall improvement of the strengths with the decrease of ply thickness is observed for the UD and NCF laminates, but nearly no effect of ply thickness is detected for STF laminates. Ply-level hybridization, where thin off-axis plies are combined with thicker grade 0 degrees plies contributes to the improvement of the laminate response, especially when thicker 0 degrees plies are used. However, hybrid-ply laminates are more sensitive to the loading direction and are, therefore, only suitable in structures where highly oriented loadings are expected. Fabric-based laminates do not show especial susceptibility to early failure compared to UD laminates. Their use can, therefore, be an economical solution that does not compromise the structural response, ensuring the weight benefits of composite materials at lower processing costs.
机译：这项工作提出了对厚度的效果的实验研究;底层杂交;造成损伤机制的造型架构的类型和多向层压板的损伤机制。九个有效等效的0度由单向碳纤维胶带（UD），非压接织物（NCF）和涂抹织物（STF）的主导多向层压板，厚度为67μm至268μm，在平原下进行测试和测试强度张力和压缩，开孔张力和压缩，填充孔压缩和张紧轴承。对于UD和NCF层压材料，观察到具有帘布层厚度降低的强度的总体改善，但对于STF层压材料，几乎没有检测到帘布层厚度的效果。晶层杂交，其中薄的轴帘布层与较厚的0度厚度相结合，有助于改善层压反应，特别是当使用较厚的0度时。然而，杂交层层压板对装载方向更敏感，因此，仅适用于预期高负荷的结构。与UD层压板相比，基于织物的层压板对早期失败的特殊易感性表示。因此，它们的使用可以是一种经济型解决方案，不损害结构响应，确保复合材料以较低的处理成本的重量益处。

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  • 来源
    《Composite Structures》 |2021年第1期|113061.1-113061.24|共24页
  • 作者

    Furtado Carolina; Tavares Rodrigo P.; Arteiro Albertino; Xavier Jose; Linde Peter; Wardle Brian L.; Camanho Pedro P.;

  • 作者单位

    Univ Porto Fac Engn DEMec Rua Dr Roberto Frias S-N P-4200465 Porto Portugal|INEGI Inst Ciencia & Inovacao Engn Mecan & Engn Ind Rua Dr Roberto Frias 400 P-4200465 Porto Portugal;

    Univ Porto Fac Engn DEMec Rua Dr Roberto Frias S-N P-4200465 Porto Portugal|INEGI Inst Ciencia & Inovacao Engn Mecan & Engn Ind Rua Dr Roberto Frias 400 P-4200465 Porto Portugal;

    Univ Porto Fac Engn DEMec Rua Dr Roberto Frias S-N P-4200465 Porto Portugal|INEGI Inst Ciencia & Inovacao Engn Mecan & Engn Ind Rua Dr Roberto Frias 400 P-4200465 Porto Portugal;

    INEGI Inst Ciencia & Inovacao Engn Mecan & Engn Ind Rua Dr Roberto Frias 400 P-4200465 Porto Portugal|Univ Nova Lisboa Fac Sci & Technol Dept Mech & Ind Engn UNIDEMI Campus Caparica P-2829516 Caparica Portugal;

    Airbus Operat GmbH Kreetslag 10 D-21129 Hamburg Germany|Chalmers Univ Technol Dept Ind & Mat Sci S-41296 Gothenburg Sweden;

    MIT Dept Aeronaut & Astronaut 77 Massachusetts Ave Cambridge MA 02139 USA;

    Univ Porto Fac Engn DEMec Rua Dr Roberto Frias S-N P-4200465 Porto Portugal|INEGI Inst Ciencia & Inovacao Engn Mecan & Engn Ind Rua Dr Roberto Frias 400 P-4200465 Porto Portugal;

  • 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

    Polymer-matrix composites (PMCs); Mechanical testing; Tow spreading;

    机译：聚合物 - 基质复合材料（PMC）;机械测试;拖曳蔓延;

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