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Strength enhancement of bonded composite laminate joints reinforced by composite Pins

机译：复合销加固粘合复合层压板的强度增强

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摘要

This paper presents an experimental and numerical investigation in the static strength enhancement of composite laminate Single Lap bonded Joints (SLJ), reinforced by pins made of Uni-Directional (UD) fibre reinforced plastic composite materials. Bonded lap joint specimens were experimentally tested in tension to obtain the failure loads and failure modes. The specimens were subsequently benchmarked against the hybrid version of the joint resulted from the introduction of composite Pins. The Pin reinforcement enhanced the hybrid single lap joint strength by an average of 19.1% increase. Numerical models generated were used for correlation with the experimental results. Numerical and experimental results observation indicated that increased strength of the hybrid bonded/Pinned joint was partly attributed to the load sharing between the adhesive and the Pin past the adhesive failure initiation as well as to the enhanced out-of-plane bending stiffness after the Pin introduction on the lap joint. Numerical investigations were performed as well with hybrid SLJ reinforced by composite pins versus designs employing metallic Pins. The simulations showed that for the investigated lap joint design parameters, the hybrid metallic pin joint failed at a higher failure load. Nevertheless, the hybrid joint utilizing the composite Pin could benefit from the enhanced corrosion resistance properties. In the case of applying a larger composite Pin diameter and/or rearranging the fibre orientation in the Pin, the hybrid SLJs could potentially achieve higher strength characteristics before the adhesive bond ultimate failure in relation to the steel Pin, as well as resulting to additional weight saving up to 46.9%.
机译：本文介绍了复合层压板单圈键合接头（SLJ）的静力强度增强的实验性和数值研究，由单向（UD）纤维增强塑料复合材料制成的销加强。在实验上测试粘结的旋盖接头标本，以获得失效载荷和失效模式。随后将标本与引入复合引脚引入关节的混合动力版本。销加固增强了杂交单圈关节强度，平均增加了19.1％。生成的数值模型用于与实验结果相关。数值和实验结果观察表明，杂交粘合/固定接头的强度部分归因于粘合剂和销之间的负荷共用，通过粘合剂衰竭启动以及销后的增强的平面外弯曲刚度。介绍在膝盖接头上。与采用金属销的复合引脚加固的混合SLJ进行了数值研究。模拟表明，对于调查的LAP联合设计参数，混合金属销接头在更高的故障负载下失效。然而，利用复合销的混合接头可以受益于增强的耐腐蚀性特性。在施加较大的复合销直径和/或重新排列销中的纤维取向的情况下，杂交SLJ可能在与钢销相关的粘合剂粘合终极故障之前潜在地实现更高的强度特性，以及导致额外的重量节省高达46.9％。

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  • 来源
    《Composite Structures》 |2020年第3期|111916.1-111916.10|共10页
  • 作者

    Li Wenhao; Guo Shijun; Giannopoulos Ioannis K.; He Shun; Liu Yiding;

  • 作者单位

    Cranfield Univ Sch Aerosp Transport & Mfg Ctr Aeronaut Cranfield MK43 0AL Beds England;

    Cranfield Univ Sch Aerosp Transport & Mfg Ctr Aeronaut Cranfield MK43 0AL Beds England;

    Cranfield Univ Sch Aerosp Transport & Mfg Ctr Aeronaut Cranfield MK43 0AL Beds England;

    Cranfield Univ Sch Aerosp Transport & Mfg Ctr Aeronaut Cranfield MK43 0AL Beds England;

    Cranfield Univ Sch Aerosp Transport & Mfg Ctr Aeronaut Cranfield MK43 0AL Beds England;

  • 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

    Composite Pin; Bonded Joint; Delamination; Hybrid Joint;

    机译：复合销;粘合关节;分层;混合关节;

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