Crack growth evaluation based on the extended finite element and particle filter combined method

IF 4.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Analysis with Boundary Elements Pub Date : 2024-10-21 DOI:10.1016/j.enganabound.2024.106004

Guizhong Xie , Jinghui Li , Hao Li , Liangwen Wang , Xiaoke Li , Hongrui Geng

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引用次数: 0

Abstract

In the issue of significant prediction deviations in fatigue crack predictions, the parameter uncertainties are usually neglected. To deal with this drawback, this paper proposes a crack growth evaluation method which takes parameter uncertainties into account to predict crack fatigue life. Firstly, the life model of crack growth is established through the combination of extended finite element method (XFEM) and Paris law. Then, the particle filter (PF) is used to reduce the uncertainty of material parameters through the actual monitoring data, and the material parameters in Paris law are estimated. Finally, the updated material parameters are put into the crack growth model for calculation, enabling a more accurate prediction of fatigue crack life. The feasibility of the proposed method is verified by two numerical examples, and the analysis results show that the proposed method can predict the fatigue crack growth life accurately.

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基于扩展有限元和粒子过滤器组合方法的裂纹生长评估

在疲劳裂纹预测存在重大预测偏差的问题上，参数的不确定性通常被忽视。针对这一缺陷，本文提出了一种考虑参数不确定性的裂纹生长评估方法来预测裂纹疲劳寿命。首先，通过扩展有限元法（XFEM）和巴黎定律的结合，建立了裂纹生长的寿命模型。然后，利用粒子过滤器（PF）通过实际监测数据降低材料参数的不确定性，并对巴黎定律中的材料参数进行估计。最后，将更新后的材料参数放入裂纹增长模型中进行计算，从而更准确地预测疲劳裂纹寿命。通过两个数值实例验证了所提方法的可行性，分析结果表明所提方法能准确预测疲劳裂纹生长寿命。

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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.