Acoustic emission-based damage characterization of 70 MPa type IV hydrogen composite pressure vessels during hydraulic tests

Acoustic emission-based damage characterization of 70 MPa type IV hydrogen composite pressure vessels during hydraulic tests

Liao, B. B. (Zhejiang University)
Wang, D. L. (Zhejiang University)
Hamdi, M. (TU Delft Structural Integrity & Composites)
Zheng, J. Y. (Zhejiang University)
Jiang, P. (Zhejiang University; Northeast Petroleum University)
Gu, C. H. (Zhejiang University)
Hong, W. R. (Zhejiang University)

2019-08-23

This paper aims to characterize the damage mechanisms of 70 MPa Type IV hydrogen composite pressure vessels using the acoustic emission (AE) method. First, AE signals were captured during the 0–105 MPa and 0–158 MPa hydraulic tests of two vessels using multi-step loading method. Second, the AE feature parameters in time-domain and frequency-domain such as amplitude, frequency, and energy are studied. A multi-parameter statistical analysis (MPSA) method based on empirical mode decomposition (EMD) and K-means algorithm is performed to cluster AE events for the vessels. Intrinsic mode functions (IMFs) are decomposed by EMD and three IMFs with high frequency are chosen to reconstruct the feature parameters and provide signal pre-processing for K-means clustering analysis. Based on the relationship between AE features and damage modes, three main clusters with separate amplitude, absolute energy, and energy are correlated to matrix cracking, fiber/matrix debonding, and fiber breakage damage mechanisms. Besides, the effectiveness of MPSA method for signal classification is validated by principal component analysis (PCA) and fast Fourier transformation (FFT) method. Finally, the AE feature parameters such as amplitude and counts to peak for the three main damage modes are studied for the hydraulic proof tests and the burst tests to explore the damage evolution behaviors of the vessels with pressure increasing. Results show that AE method can be reliably used to characterize damage evolution mechanisms in composite pressure vessels.

Damage evolution mechanisms
Damage modes recognition
Hydraulic tests
Hydrogen composite pressure vessel

http://resolver.tudelft.nl/uuid:6fed8ff8-ad7e-42cd-9a41-28846f1863f4

https://doi.org/10.1016/j.ijhydene.2019.02.217

2021-08-10

0360-3199

International Journal of Hydrogen Energy, 44 (40), 22494-22506

Institutional Repository

journal article

© 2019 B. B. Liao, D. L. Wang, M. Hamdi, J. Y. Zheng, P. Jiang, C. H. Gu, W. R. Hong