Fatigue analysis of crack propagation in structures with bonded composite repairs

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Analysis with Boundary Elements Pub Date : 2025-01-13 DOI:10.1016/j.enganabound.2025.106116

Lucas S. Moura , Andres F. Galvis , Andres F. Ramirez , Eder L. Abuquerque , Paulo Sollero

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引用次数: 0

Abstract

Recent growth in the aeronautical and oil industries has increased the demand for efficient repair techniques that offer shorter maintenance periods, greater durability, and reduced costs. Bonded composite repairs have emerged as an excellent solution, enabling the restoration of components without compromising structural integrity. By the first attempt, the coupling of the 3D boundary element method (BEM) coupled to the generalised energy failure criteria is used for analysing crack propagation and fatigue life in structures with bonded composite repairs. This criterion is based on strain energy density concept. Initially, crack propagation for bonded single lap joint (SLJ) and bonded double cantilever beam (DCB) served for experimental validation of the numerical approach. Experimentally, fatigue tests were performed to evaluate crack propagation using digital image correlation (DIC), and the repair debonding via an unidirectional laser vibrometer. Comparing numerical and experimental results revealed that incorporating the failure of the adhesive in the simulation setup improves the accuracy over those models in the literature that consider only the failure of the plate.

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结合复合材料修复结构裂纹扩展的疲劳分析

近年来，航空和石油工业的发展增加了对高效维修技术的需求，这些技术可以提供更短的维修周期、更高的耐用性和更低的成本。粘合复合材料修复已经成为一种极好的解决方案，可以在不影响结构完整性的情况下修复部件。通过首次尝试，将三维边界元法（BEM）与广义能量失效准则耦合，用于分析结合复合材料修复结构的裂纹扩展和疲劳寿命。该准则基于应变能密度概念。首先，对单搭接节点（SLJ）和双悬臂梁（DCB）的裂纹扩展进行了实验验证。实验中，采用数字图像相关（DIC）技术对裂纹扩展进行了疲劳测试，并采用单向激光测振仪对裂纹进行了修复剥离。比较数值和实验结果表明，与文献中只考虑板的失效的模型相比，在模拟设置中考虑胶粘剂的失效提高了模型的精度。

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

Engineering Analysis with Boundary Elements 工程技术-工程：综合

CiteScore

5.50

自引率

18.20%

发文量

368

审稿时长

56 days

期刊介绍： This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods. Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness. The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields. In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research. The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods Fields Covered: • Boundary Element Methods (BEM) • Mesh Reduction Methods (MRM) • Meshless Methods • Integral Equations • Applications of BEM/MRM in Engineering • Numerical Methods related to BEM/MRM • Computational Techniques • Combination of Different Methods • Advanced Formulations.