Abstract The increase in composites usage for primary and secondary structural components demands advanced repair techniques such as doubler, multi-step, and scarf to restore a damaged structure to its original design capability. Currently, most scarf repairs employ a straight taper at a typical ratio ranging between 1:20 to 1:60 to attain the original design strength. This paper aims to present a new method for reducing the footprint of scarf repairs by optimizing the taper profile through the composite thickness. Experiments are carried out on scarf repairs with piece-wise linear scarf joints, in which the 0° plies are tapered at two different ratios of 1:30 and 1:20, while the 45° and 90° plies are tapered at a ratio of 1:2. Experimental results show that compared to 1:20 straight scarf, the 1:30/1:2 piece-wise linear scarf can achieve 75% of the tensile strength while reducing the repair size by 60%.

中文翻译：

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使用可变围巾角度减少修复尺寸

摘要 随着复合材料用于主要和次要结构部件的增加，需要采用先进的修复技术，如双工、多步和围巾，以将损坏的结构恢复到其原始设计能力。目前，大多数围巾修复采用直锥度，典型比例在 1:20 到 1:60 之间，以达到原始设计强度。本文旨在提出一种通过复合材料厚度优化锥度轮廓来减少围巾修复足迹的新方法。使用分段线性围巾接头进行围巾修复实验，其中 0° 层以 1:30 和 1:20 两种不同比例逐渐变细，而 45° 和 90° 层以两种不同比例逐渐变细1:2。实验结果表明，与1:20直围围巾相比，1:30/1：