Adhesively Bonded Composite Patch Repair in Load-Bearing Applications for the Aviation Industry: Manufacturing, Design, and Simulation

IF 3.2 2区材料科学 Q2 ENGINEERING, MECHANICAL Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-01-08 DOI:10.1111/ffe.14552

P. H. E. Fernandes, M. Baumert, S. Dieckhoff, C. Nagel, V. C. Beber

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Abstract

Four adhesively bonded composite patch repairs are considered: with one and two double CFRP layers and with scarf ratios of 1:15 and 1:30. Prepregs are applied to an artificially cracked aluminum plate and bonded using a film adhesive. Considering curing-induced deflection of patches, samples with two double CFRP layers and a scarf ratio of 1:15 exhibit the highest deflection, while the patch with one double CFRP layer and a scarf ratio of 1:30 shows the lowest deflection. FE simulations align with experimental results showing deviations between −3% and +16%. Fatigue results of crack length as function of cycles reveal that patched samples have longer lifetimes (3.2–4.3 times) compared to nonpatched samples. Among patched samples, those with two double CFRP layers and a scarf ratio of 1:15 provide approximately 20% and 8% longer service life compared to counterparts with one double CFRP layer and a scarf ratio of 1:30, respectively.

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航空业承重应用中的粘合剂粘接复合材料补丁修复：制造、设计和模拟

考虑了四种粘接复合补丁修复：一层和两层双层CFRP层，围巾比例分别为1:15和1:30。将预浸料涂在人工开裂的铝板上，并用薄膜粘合剂粘合。考虑固化引起的挠度，两层双层CFRP、围带比为1:15的贴片挠度最大，一层双层CFRP、围带比为1:30的贴片挠度最小。有限元模拟与实验结果一致，显示偏差在- 3%和+16%之间。裂纹长度随周期变化的疲劳结果表明，修补试样的寿命比未修补试样长（3.2 ~ 4.3倍）。在打补丁的样品中，两层双层CFRP、围巾比为1:15的样品比一层双层CFRP、围巾比为1:30的样品的使用寿命分别延长约20%和8%。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.