Lingyu Sun, Changchao Liu, Mingshun Jiang, Lei Zhang, Faye Zhang, Qingmei Sui, Lei Jia. Fatigue Crack Prediction Method for Aluminum Alloy Based on Fiber Bragg Grating Array[J]. Chinese Journal of Lasers, 2021, 48(13): 1306003
- Chinese Journal of Lasers
- Vol. 48, Issue 13, 1306003 (2021)
Fig. 1. Flow chart of fatigue crack prediction based on FBG
Fig. 2. Component size diagram
Fig. 3. Strain field nephograms at different stages of crack propagation. (a) Crack initiation; (b) initial crack propagation; (c) steady crack propagation; (d) crack approaching failure
Fig. 4. Fatigue crack growth monitoring experimental system based on FBG
Fig. 5. Overall schematic diagram of FBG demodulation system
Fig. 6. Fatigue tensile results of samples 1--4
Fig. 7. Schematic diagram of FBG sensor array
Fig. 8. Actual pasting position of FBG sensor array
Fig. 9. Fitting result of fatigue extension a-N curve
Fig. 10. Wavelength change measured by sensor FBG1
Fig. 11. Relationship between peak-to-peak wavelength and cyclic loading times
Fig. 12. Relationship between peak-to-peak wavelength and crack length
Fig. 13. Tensile results of aluminum alloy sample 5
Fig. 14. Principle diagram of GBRT
Fig. 15. Principle of 5-fold cross-verification
Fig. 16. Prediction result of GBRT algorithm
|
Table 1. Material properties of simulation experiment
|
Table 2. Results of fatigue tensile test
|
Table 3. Evaluation indexes of fitting curve
|
Table 4. 5-fold cross-validation results of GBRT model
|
Table 5. Regression performance evaluation results of GBRT model
|
Table 6. Regression performance evaluation results of model
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20