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

Paper Number: 106995

106995 - Blister Damage Evolution in Plastic Liner of Type IV Hydrogen Storage Vessel Studied by Fracture Mechanics 

Type Ⅳ vessels are widely used for high-pressure hydrogen storage of onboard vehicles due to their advantages in lightweight, durability, economy, etc. However, the plastic liner of type Ⅳ vessel is likely to blister during depressurization after exposing it to high-pressure hydrogen, which can further cause the liner to fracture and hydrogen leakage. The generally accepted reason why the plastic linear blisters is that hydrogen is absorbed by the plastic liner at high pressure and occupies the preexisting cavities in the liner, which causes cracking-like blistering under internal pressure acting on the cavities when depressurizing. A model based on fracture mechanics was deployed to predict the blister damage evolution in the plastic liner. The blister damage propagation was evaluated by tearing energy induced by the internal pressure acting on the cavity, which is related to the vessel’s inner pressure. And the blister damage evolution inside the plastic liner with different depressurization rates was also studied. Besides, the effects of the cavity location and size on blister growth were studied. It was found that the internal pressure acting on the cavity plays a key role in blister growth and blister damage evolution varies with the location and size of the cavity.

Presenting Author: Hao Shi Zhejiang University

Presenting Author Biography: I am a graduate student at Zhejiang University, pursuing a master's degree in engineering.

Authors:

Hao Shi Zhejiang University
Wenzhu Peng Zhejiang University
Liqing Wei Zhejiang University
Qiubing Kang Zhejiang University
Qi Chen Zhejiang University
Zhengli Hua Zhejiang University