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Micro-bolt repair for delaminated composite plate under compression

机译：压缩条件下分层复合板的微螺栓修复

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摘要

This study proposes a method for repairing delaminated composite plates using micro-bolts. We first conducted a test to examine the effect of the hole size on the tensile strength of composite laminates. The test results showed that, among laminates with the same total area of holes, those with multiple small holes had a higher tensile strength than those with only a single large hole. Based on this result, brass bolts with a 0.6 mm diameter were used to repair the delaminated composite plates. Buckling tests and analysis were conducted for an intact laminate without delamination, an unrepaired laminate with delamination, a repaired laminate using one bolt, three bolts with two types of layout, and nine bolts. The test results indicate that the unrepaired specimen demonstrates local buckling at 68% of the buckling load of an intact specimen. In contrast, the buckling load was recovered to 82% of that of an intact specimen when only a single brass bolt was fastened. When nine bolts were used, the buckling load recovery rate increased to 90%. Finite element analysis produced the same results as the test, and predicted that the use of nine steel bolts will increase the buckling load to 93%.
机译：这项研究提出了一种使用微螺栓修复分层复合板的方法。我们首先进行了一项测试，以检验孔尺寸对复合材料层压板拉伸强度的影响。测试结果表明，在具有相同总孔面积的层压板中，具有多个小孔的层压板的拉伸强度高于仅具有一个大孔的层压板。基于此结果，使用直径为0.6 mm的黄铜螺栓来修复分层的复合板。对完整无分层的层压板，未分层的未修复层压板，使用一个螺栓的修复层压板，使用两种布局的三个螺栓和九个螺栓进行了屈曲测试和分析。测试结果表明，未修复的试样在完整试样的屈曲载荷的68％处表现出局部屈曲。相反，当仅固定一个黄铜螺栓时，屈曲载荷恢复到完整样品的屈曲载荷的82％。当使用九个螺栓时，屈曲载荷恢复率提高到90％。有限元分析得出的结果与试验相同，并预测使用9个钢螺栓将使屈曲载荷增加至93％。

著录项

  • 来源
    《Composite Structures》 |2018年第5期|245-254|共10页
  • 作者

    Park Sang-Seon; Choe Hyeon-Seok; Kwak Byeong-Su; Choi Jin-Ho; Kweon Jin-Hwe;

  • 作者单位

    Gyeongsang Natl Univ, Sch Mech & Aerosp Engn, Jinju 52828, Gyeongnam, South Korea;

    Gyeongsang Natl Univ, Sch Mech & Aerosp Engn, Jinju 52828, Gyeongnam, South Korea;

    Gyeongsang Natl Univ, Sch Mech & Aerosp Engn, Jinju 52828, Gyeongnam, South Korea;

    Gyeongsang Natl Univ, Sch Mech & Aerosp Engn, Jinju 52828, Gyeongnam, South Korea;

    Gyeongsang Natl Univ, Sch Mech & Aerosp Engn, Jinju 52828, Gyeongnam, South Korea;

  • 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

    Buckling; Delamination; Micro-bolt; Repair;

    机译：屈曲;分层;微螺栓;修复;

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