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- Title
Multiaxial fatigue life prediction for various metallic materials based on the hybrid CNN‐LSTM neural network.
- Authors
Heng, Fei; Gao, Jianxiong; Xu, Rongxia; Yang, Haojin; Cheng, Qin; Liu, Yuanyuan
- Abstract
A new algorithm optimization‐based hybrid neural network model is proposed in the present study for the multiaxial fatigue life prediction of various metallic materials. Firstly, a convolutional neural network (CNN) is applied to extract the in‐depth features from the loading sequence composed of the critical fatigue loading conditions. Meanwhile, the multiaxial historical loading information with time‐series features is retained. Then, a long short‐term memory (LSTM) network is adopted to capture the time‐series features and in‐depth features of the CNN output. Finally, a full connection layer is used to achieve dimensional transformation, which makes the fatigue life predictable. Herein, the hyperparameters of the LSTM network are automatically determined using the slime mold algorithm (SMA). The test results demonstrate that the proposed model has pleasant prediction performance and extrapolation capability, and it is suitable for the life prediction of various metallic materials under uniaxial, proportional multiaxial, nonproportional multiaxial loading conditions. Highlights: A multiaxial fatigue life prediction model was proposed based on the deep learning methods.The advantages of convolution neural network and long short‐term memory network are combined.Effectiveness of the new method was verified by four materials.The extrapolated capability of different machine learning models is explored.
- Subjects
MATERIAL fatigue; FATIGUE life; CONVOLUTIONAL neural networks; DEEP learning; FORECASTING; MYXOMYCETES
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2023, Vol 46, Issue 5, p1979
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.13977