Session: HT-07-01 Design and Analysis of High Pressure Hydrogen Equipment (Joint with CS-02 and MF-02)

Paper Number: 107027

107027 - Research on the Influence of the Liner Crack Size and Location on Fatigue Life of 70MPA Type III Cylinder 

Hydrogen energy is a potential "energy carrier" with the characteristics of diverse sources, large-scale storage, clean and environmental protection, etc. Carbon fiber reinforced composite hydrogen storage cylinder with Aluminum liner (Type III hydrogen storage cylinder) is widely used in automobile hydrogen storage due to its mature manufacturing process, light weight and excellent hydrogen embrittlement resistance. However, its safety and fatigue resistance are still of great concern. Fatigue failure is an important failure form of Type III hydrogen storage cylinder, and it is also an important reason to restrict its high-pressure development. Under the action of repeated inflation and deflation, the stress on the metal liner changes periodically, and fatigue cracks will initiate and expand on the surface of the metal liner. In this work, the fatigue crack growth method based on fracture mechanics is adopted, and the fatigue life prediction model of III type bottle is established by using the finite element calculation software platform. At the same time, an elastic-plastic finite-element analysis has been carried out to study the autofrettage process and fracture behaviour of 6061 aluminum liner. The impacts of various parameters (length, depth and location of initial cracks) on fatigue life and crack growth process are also investigated.

Presenting Author: Yulin Wang Zhejiang University

Presenting Author Biography: I am a master of the School of Energy Engineering of Zhejiang University, and my research direction is high-pressure hydrogen storage vessel.

Authors:

Yulin Wang Zhejiang University
Qinan Li Zhejiang University
Wenlong Ha ZheJiang HeBang Security Technology Co.，Ltd.
Yiming Zhao Zhejiang University
Zhengli Hua Zhejiang University
Liqing Wei Zhejiang University
Chaohua Gu Zhejiang University