Influence of adhesive fillets on fatigue behaviour of single‐strap composite repairs

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

Strain Pub Date : 2023-06-09 DOI:10.1111/str.12454

F. Ramírez, R. Moreira, M. D. de Moura

引用次数: 0

Abstract

The objective of this work is to analyse the influence of adhesive fillets on the fatigue/fracture behaviour of single‐strap adhesive repairs of carbon‐epoxy composites. A cohesive zone model (CZM) appropriate for high‐cycle fatigue analysis was employed. A preliminary model validation was performed using results ensuing from experimental testing of single‐strap adhesive repairs without fillets. Subsequently, the numerical model was used to investigate the effect of outer, inner and both (outer and inner) fillets on the quasi‐static strengths and on the fatigue lives of these repairs. It was concluded that inner fillets provide the best option concerning the increase of fatigue life or a maximum fatigue load for a given planned service‐life of the repaired component.

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粘接圆角对单带复合材料修复疲劳性能的影响

本工作的目的是分析粘合圆角对碳-环氧复合材料单带粘合修复疲劳/断裂行为的影响。采用了适用于高周疲劳分析的内聚区模型（CZM）。使用无圆角的单带粘合剂修复的实验测试结果进行了初步模型验证。随后，使用数值模型研究了外部、内部和两个（外部和内部）圆角对这些修复的准静态强度和疲劳寿命的影响。得出的结论是，在给定的维修部件计划使用寿命内，内圆角提供了增加疲劳寿命或最大疲劳载荷的最佳选择。

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.