Title: Research on crack propagation of aircraft engine blades based on multi-physics field coupling and modal frequencies

Authors: Junxi Bi; Xinyu Ge; Zenglin Hu; Jinfeng Li; Shaonan Yang; Hongwei Gao; Min Wu

Addresses: School of Aeronautics, Inner Mongolia University of Technology, Hohhot, Inner Mongolia, China; College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia, China ' College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia, China ' College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia, China ' Inner Mongolia Autonomous Region Measurement and Testing Research Institute, Hohhot, Inner Mongolia, China ' Hohhot Boyang Renewable Energy Co., Ltd., Hohhot, China ' Vocational and Technical College of Inner Mongolia Agricultural University, Baotou, China ' Undergraduate Academic Affairs Office, Inner Mongolia University of Technology, Hohhot, Inner Mongolia, China

Abstract: With the continuous development of the aviation industry, crack propagation in aircraft engine blades has become an undeniable factor affecting aviation safety. In this study, a method based on multi-physics coupling and modal frequencies is proposed to investigate the characteristics and mechanisms of crack propagation in aircraft engine blades. Firstly, a numerical model based on finite element analysis and the Extended Finite Element Method (XFEM) is established to describe the multi-physics response and crack propagation behaviour of engine blades. Secondly, the proposed numerical model and analysis methods are utilised to conduct in-depth research on the characteristics and mechanisms of crack propagation in aircraft engine blades. Furthermore, modal frequency analysis is introduced to analyse the dynamic response and crack propagation mechanisms of the blades under different modes. Finally, the main achievements and contributions of the study on crack propagation of aircraft engine blades based on multi-physics coupling and modal frequency analysis are summarised, and future research directions are discussed.

Keywords: engine blades; fatigue crack; natural frequency; fluid-structure coupling.

DOI: 10.1504/IJRS.2024.139212

International Journal of Reliability and Safety, 2024 Vol.18 No.2, pp.103 - 120

Received: 18 Sep 2023
Accepted: 12 Dec 2023
Published online: 26 Jun 2024 *

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