Integration of eddy current sensors into repair patches for fatigue reinforcement at rivet holes

IF 1.8 3区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Strain Pub Date : 2021-05-06 DOI:10.1111/str.12387

S. Schmid, U. Martens, W. Schomburg, K. Schröder

引用次数: 4

Abstract

Fatigue cracks at rivet holes occur at advanced service life of aircrafts due to cyclic loading. As a repair method, adhesively bonded stiffener patches enhance the fatigue life of the structure by delaying crack initiation and reducing crack growth. Combining a crack sensor with a repair patch to a sensor‐based stiffener patch allows crack growth reduction and monitoring at the same time. This paper presents a feasibility study on the integration of eddy current sensors into carbon fibre reinforced plastic (CFRP) repair patches. To this end, a specific patch design is developed, and samples are manufactured by ultrasonic fabrication. The performance of the patches is investigated in fatigue tests in terms of ‘crack reinforcement’ and ‘crack detection.’ Both requirements are met. The undertaking of future efforts to tailor the sensor‐based repair patch concept to an individual application in aircraft maintenance seems reasonable.

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将涡电流传感器集成到铆钉孔疲劳补强补片中

在飞机使用寿命较长的情况下，由于循环载荷的作用，铆钉孔处会出现疲劳裂纹。作为一种修复方法，粘结加劲肋补片通过延迟裂纹萌生和减少裂纹扩展来提高结构的疲劳寿命。将裂纹传感器与修复补片结合到基于传感器的加强补片中，可以同时减少裂纹扩展并进行监测。本文介绍了将涡流传感器集成到碳纤维增强塑料（CFRP）修补片中的可行性研究。为此，开发了一种特定的贴片设计，并通过超声波制造来制造样品。在疲劳试验中，从“裂纹强化”和“裂纹检测”的角度研究了补片的性能这两个要求都得到满足。未来致力于将基于传感器的维修补丁概念定制为飞机维护中的单个应用似乎是合理的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Strain 工程技术-材料科学：表征与测试

CiteScore

4.10

自引率

4.80%

发文量

期刊介绍： Strain is an international journal that contains contributions from leading-edge research on the measurement of the mechanical behaviour of structures and systems. Strain only accepts contributions with sufficient novelty in the design, implementation, and/or validation of experimental methodologies to characterize materials, structures, and systems; i.e. contributions that are limited to the application of established methodologies are outside of the scope of the journal. The journal includes papers from all engineering disciplines that deal with material behaviour and degradation under load, structural design and measurement techniques. Although the thrust of the journal is experimental, numerical simulations and validation are included in the coverage. Strain welcomes papers that deal with novel work in the following areas: experimental techniques non-destructive evaluation techniques numerical analysis, simulation and validation residual stress measurement techniques design of composite structures and components impact behaviour of materials and structures signal and image processing transducer and sensor design structural health monitoring biomechanics extreme environment micro- and nano-scale testing method.