TY - JOUR
T1 - A novel machine learning model to design historical-independent health indicators for composite structures
AU - Moradi, Morteza
AU - Gul, Ferda C.
AU - Zarouchas, Dimitrios
PY - 2024
Y1 - 2024
N2 - Developing comprehensive health indicators (HIs) for composite structures encompassing various damage types is challenging due to the stochastic nature of damage accumulation and uncertain events (like impact) during operation. This complexity is amplified when striving for HIs independent of historical data. This paper introduces an AI-driven approach, the Hilbert transform-convolutional neural network under a semi-supervised learning paradigm, to designing reliable HIs (fulfilling requirements, referred to as 'fitness'). It exclusively utilizes current guided wave data, eliminating the need for historical information. Ensemble learning techniques were also used to enhance HI quality while reducing deep learning randomness. The fitness equation is refined for dependable comparisons and practicality. The methodology is validated through investigations on T-single stiffener CFRP panels under compression-fatigue and dogbone CFRP specimens under tension-fatigue loadings, showing high performance of up to 93% and 81%, respectively, in prognostic criteria.
AB - Developing comprehensive health indicators (HIs) for composite structures encompassing various damage types is challenging due to the stochastic nature of damage accumulation and uncertain events (like impact) during operation. This complexity is amplified when striving for HIs independent of historical data. This paper introduces an AI-driven approach, the Hilbert transform-convolutional neural network under a semi-supervised learning paradigm, to designing reliable HIs (fulfilling requirements, referred to as 'fitness'). It exclusively utilizes current guided wave data, eliminating the need for historical information. Ensemble learning techniques were also used to enhance HI quality while reducing deep learning randomness. The fitness equation is refined for dependable comparisons and practicality. The methodology is validated through investigations on T-single stiffener CFRP panels under compression-fatigue and dogbone CFRP specimens under tension-fatigue loadings, showing high performance of up to 93% and 81%, respectively, in prognostic criteria.
KW - Compression-compression fatigue
KW - Intelligent health indicator
KW - Prognostics and health management
KW - Semi-supervised learning
KW - T-single stiffener CFRP
KW - Tension-tension fatigue
UR - http://www.scopus.com/inward/record.url?scp=85186622390&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2024.111328
DO - 10.1016/j.compositesb.2024.111328
M3 - Article
AN - SCOPUS:85186622390
SN - 1359-8368
VL - 275
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 111328
ER -