In recent years, hydrogen, one of renewable energy, has attracted attention. For widespread commercialization of the hydrogen-energy systems, a useful and reliable evaluation method should be developed for capturing the degradation of strength and fatigue properties of metals in presence of hydrogen. This paper implemented transient hydrogen diffusion-elastoplastic coupling analysis program into a commercial software of Finite Element Analysis (Abaqus) to predict the fatigue crack growth (FCG) acceleration of a low carbon steel (JIS-SM490B) in high-pressure hydrogen gas. For this simulation, hydrogen-diffusion properties (concentration and diffusivity) depending on plastic strain were experimentally obtained. Our thorough numerical results proposed a practical technique to predict an onset of hydrogen-enhanced FCG acceleration measured in experiments, via the numerically obtained gradient of hydrogen concentration at the crack tip. In addition, a practical technique to predict the hydrogen-enhanced FCG acceleration ratio was also discussed based on the gradient of hydrogen concentration.
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ASME 2018 Pressure Vessels and Piping Conference
July 15–20, 2018
Prague, Czech Republic
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5168-5
PROCEEDINGS PAPER
Transient Hydrogen Diffusion/Elastoplastic Coupling Analysis for Predicting Fatigue Crack Growth Acceleration of Low-Carbon Steel in Gaseous Hydrogen
Kaito Kawahara,
Kaito Kawahara
University of Ryukyus, Okinawa, Japan
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Masaki Fujikawa,
Masaki Fujikawa
University of Ryukyus, Okinawa, Japan
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Junichiro Yamabe
Junichiro Yamabe
Kyushu University, Fukuoka, Japan
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Kaito Kawahara
University of Ryukyus, Okinawa, Japan
Masaki Fujikawa
University of Ryukyus, Okinawa, Japan
Junichiro Yamabe
Kyushu University, Fukuoka, Japan
Paper No:
PVP2018-84390, V06BT06A031; 7 pages
Published Online:
October 26, 2018
Citation
Kawahara, K, Fujikawa, M, & Yamabe, J. "Transient Hydrogen Diffusion/Elastoplastic Coupling Analysis for Predicting Fatigue Crack Growth Acceleration of Low-Carbon Steel in Gaseous Hydrogen." Proceedings of the ASME 2018 Pressure Vessels and Piping Conference. Volume 6B: Materials and Fabrication. Prague, Czech Republic. July 15–20, 2018. V06BT06A031. ASME. https://doi.org/10.1115/PVP2018-84390
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